Could you please make a backtrace for me?

After installing gdb, run it like:

gdb --args php which phpunit --coverage-html=build/coverage --debug

You'll get a prompt, on which you can type "run". Then, when it crashes, type "bt full", and give me the full output.

No problem.
I run it several times and I get two different error message.
Here is the first kind of error message :

=======================================================

j0k@MBP:~/Sites/f43.me$ sudo gdb --args php which phpunit --coverage-html=build/coverage --debug
GNU gdb (GDB) 7.8.2
Copyright (C) 2014 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-apple-darwin14.1.0".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from php...(no debugging symbols found)...done.
(gdb) run
Starting program: /usr/local/bin/php /Users/j0k/.composer/vendor/bin/phpunit --coverage-html=build/coverage --debug
warning: Could not open OSO archive file "/BinaryCache/corecrypto/corecrypto-233.1.2~26/Symbols/BuiltProducts/libcorecrypto_static.a"
warning: /BinaryCache/coreTLS/coreTLS-35.1.2~2/Objects/coretls.build/coretls.build/Objects-normal/x86_64/system_coretls_vers.o': can't open to read symbols: No such file or directory. warning: Could not open OSO archive file "/BinaryCache/coreTLS/coreTLS-35.1.2~2/Symbols/BuiltProducts/libcoretls_ciphersuites.a" warning: Could not open OSO archive file "/BinaryCache/coreTLS/coreTLS-35.1.2~2/Symbols/BuiltProducts/libcoretls_handshake.a" warning: Could not open OSO archive file "/BinaryCache/coreTLS/coreTLS-35.1.2~2/Symbols/BuiltProducts/libcoretls_record.a" warning: Could not open OSO archive file "/BinaryCache/coreTLS/coreTLS-35.1.2~2/Symbols/BuiltProducts/libcoretls_stream_parser.a" warning:/BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/bdz.o': can't open to read symbols: No such file or directory.
warning: /BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/bdz_ph.o': can't open to read symbols: No such file or directory. warning:/BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/bmz.o': can't open to read symbols: No such file or directory.
warning: /BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/bmz8.o': can't open to read symbols: No such file or directory. warning:/BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/brz.o': can't open to read symbols: No such file or directory.
warning: /BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/buffer_entry.o': can't open to read symbols: No such file or directory. warning:/BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/buffer_manager.o': can't open to read symbols: No such file or directory.
warning: /BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/chd.o': can't open to read symbols: No such file or directory. warning:/BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/chd_ph.o': can't open to read symbols: No such file or directory.
warning: /BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/chm.o': can't open to read symbols: No such file or directory. warning:/BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/cmph.o': can't open to read symbols: No such file or directory.
warning: /BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/cmph_structs.o': can't open to read symbols: No such file or directory. warning:/BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/compressed_rank.o': can't open to read symbols: No such file or directory.
warning: /BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/compressed_seq.o': can't open to read symbols: No such file or directory. warning:/BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/fch.o': can't open to read symbols: No such file or directory.
warning: /BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/fch_buckets.o': can't open to read symbols: No such file or directory. warning:/BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/graph.o': can't open to read symbols: No such file or directory.
warning: /BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/hash.o': can't open to read symbols: No such file or directory. warning:/BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/jenkins_hash.o': can't open to read symbols: No such file or directory.
warning: /BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/linear_string_map.o': can't open to read symbols: No such file or directory. warning:/BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/miller_rabin.o': can't open to read symbols: No such file or directory.
warning: /BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/select.o': can't open to read symbols: No such file or directory. warning:/BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/vqueue.o': can't open to read symbols: No such file or directory.
warning: /BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/vstack.o': can't open to read symbols: No such file or directory. warning:/usr/local/Cellar/php55-xdebug/2.3.0/xdebug-2.3.0/.libs/usefulstuff.o': can't open to read symbols: No such file or directory.
warning: /usr/local/Cellar/php55-xdebug/2.3.0/xdebug-2.3.0/.libs/xdebug.o': can't open to read symbols: No such file or directory. warning:/usr/local/Cellar/php55-xdebug/2.3.0/xdebug-2.3.0/.libs/xdebug_branch_info.o': can't open to read symbols: No such file or directory.
warning: /usr/local/Cellar/php55-xdebug/2.3.0/xdebug-2.3.0/.libs/xdebug_code_coverage.o': can't open to read symbols: No such file or directory. warning:/usr/local/Cellar/php55-xdebug/2.3.0/xdebug-2.3.0/.libs/xdebug_com.o': can't open to read symbols: No such file or directory.
warning: /usr/local/Cellar/php55-xdebug/2.3.0/xdebug-2.3.0/.libs/xdebug_compat.o': can't open to read symbols: No such file or directory. warning:/usr/local/Cellar/php55-xdebug/2.3.0/xdebug-2.3.0/.libs/xdebug_handler_dbgp.o': can't open to read symbols: No such file or directory.
warning: /usr/local/Cellar/php55-xdebug/2.3.0/xdebug-2.3.0/.libs/xdebug_handlers.o': can't open to read symbols: No such file or directory. warning:/usr/local/Cellar/php55-xdebug/2.3.0/xdebug-2.3.0/.libs/xdebug_hash.o': can't open to read symbols: No such file or directory.
warning: /usr/local/Cellar/php55-xdebug/2.3.0/xdebug-2.3.0/.libs/xdebug_llist.o': can't open to read symbols: No such file or directory. warning:/usr/local/Cellar/php55-xdebug/2.3.0/xdebug-2.3.0/.libs/xdebug_private.o': can't open to read symbols: No such file or directory.
warning: /usr/local/Cellar/php55-xdebug/2.3.0/xdebug-2.3.0/.libs/xdebug_profiler.o': can't open to read symbols: No such file or directory. warning:/usr/local/Cellar/php55-xdebug/2.3.0/xdebug-2.3.0/.libs/xdebug_set.o': can't open to read symbols: No such file or directory.
warning: /usr/local/Cellar/php55-xdebug/2.3.0/xdebug-2.3.0/.libs/xdebug_stack.o': can't open to read symbols: No such file or directory. warning:/usr/local/Cellar/php55-xdebug/2.3.0/xdebug-2.3.0/.libs/xdebug_str.o': can't open to read symbols: No such file or directory.
warning: /usr/local/Cellar/php55-xdebug/2.3.0/xdebug-2.3.0/.libs/xdebug_superglobals.o': can't open to read symbols: No such file or directory. warning:/usr/local/Cellar/php55-xdebug/2.3.0/xdebug-2.3.0/.libs/xdebug_trace_computerized.o': can't open to read symbols: No such file or directory.
warning: /usr/local/Cellar/php55-xdebug/2.3.0/xdebug-2.3.0/.libs/xdebug_trace_html.o': can't open to read symbols: No such file or directory. warning:/usr/local/Cellar/php55-xdebug/2.3.0/xdebug-2.3.0/.libs/xdebug_trace_textual.o': can't open to read symbols: No such file or directory.
warning: /usr/local/Cellar/php55-xdebug/2.3.0/xdebug-2.3.0/.libs/xdebug_tracing.o': can't open to read symbols: No such file or directory. warning:/usr/local/Cellar/php55-xdebug/2.3.0/xdebug-2.3.0/.libs/xdebug_var.o': can't open to read symbols: No such file or directory.
warning: `/usr/local/Cellar/php55-xdebug/2.3.0/xdebug-2.3.0/.libs/xdebug_xml.o': can't open to read symbols: No such file or directory.
PHPUnit 4.5.0 by Sebastian Bergmann and contributors.

Configuration read from /Users/j0k/Sites/f43.me/phpunit.xml.dist

Starting test 'Api43\FeedBundle\Tests\Api43FeedBundleTest::testInitBundle'.
.
Starting test 'Api43\FeedBundle\Tests\Command\FetchItemsCommandTest::testNoParams'.
php(2029,0x7fff71114300) malloc: error for object 0x104512190: incorrect checksum for freed object - object was probably modified after being freed.
set a breakpoint in malloc_error_break to debug

Program received signal SIGABRT, Aborted.
0x00007fff809b4286 in pthread_kill () from /usr/lib/system/libsystem_kernel.dylib
(gdb) bt full
#0 0x00007fff809b4286 in pthread_kill () from /usr/lib/system/libsystem_kernel.dylib
No symbol table info available.
#1 0x00007fff871cc42f in vtable for AACAudioFile () from /usr/lib/system/libsystem_pthread.dylib
No symbol table info available.
0000002 0x0000000000000000 in ?? ()
No symbol table info available.
(gdb)

=======================================================

Here is the second (much longer when typed bt full:

(gdb) run
The program being debugged has been started already.
Start it from the beginning? (y or n) y
Starting program: /usr/local/bin/php /Users/j0k/.composer/vendor/bin/phpunit --coverage-html=build/coverage --debug
warning: Could not open OSO archive file "/BinaryCache/corecrypto/corecrypto-233.1.2~26/Symbols/BuiltProducts/libcorecrypto_static.a"
warning: /BinaryCache/coreTLS/coreTLS-35.1.2~2/Objects/coretls.build/coretls.build/Objects-normal/x86_64/system_coretls_vers.o': can't open to read symbols: No such file or directory. warning: Could not open OSO archive file "/BinaryCache/coreTLS/coreTLS-35.1.2~2/Symbols/BuiltProducts/libcoretls_ciphersuites.a" warning: Could not open OSO archive file "/BinaryCache/coreTLS/coreTLS-35.1.2~2/Symbols/BuiltProducts/libcoretls_handshake.a" warning: Could not open OSO archive file "/BinaryCache/coreTLS/coreTLS-35.1.2~2/Symbols/BuiltProducts/libcoretls_record.a" warning: Could not open OSO archive file "/BinaryCache/coreTLS/coreTLS-35.1.2~2/Symbols/BuiltProducts/libcoretls_stream_parser.a" warning:/BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/bdz.o': can't open to read symbols: No such file or directory.
warning: /BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/bdz_ph.o': can't open to read symbols: No such file or directory. warning:/BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/bmz.o': can't open to read symbols: No such file or directory.
warning: /BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/bmz8.o': can't open to read symbols: No such file or directory. warning:/BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/brz.o': can't open to read symbols: No such file or directory.
warning: /BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/buffer_entry.o': can't open to read symbols: No such file or directory. warning:/BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/buffer_manager.o': can't open to read symbols: No such file or directory.
warning: /BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/chd.o': can't open to read symbols: No such file or directory. warning:/BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/chd_ph.o': can't open to read symbols: No such file or directory.
warning: /BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/chm.o': can't open to read symbols: No such file or directory. warning:/BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/cmph.o': can't open to read symbols: No such file or directory.
warning: /BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/cmph_structs.o': can't open to read symbols: No such file or directory. warning:/BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/compressed_rank.o': can't open to read symbols: No such file or directory.
warning: /BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/compressed_seq.o': can't open to read symbols: No such file or directory. warning:/BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/fch.o': can't open to read symbols: No such file or directory.
warning: /BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/fch_buckets.o': can't open to read symbols: No such file or directory. warning:/BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/graph.o': can't open to read symbols: No such file or directory.
warning: /BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/hash.o': can't open to read symbols: No such file or directory. warning:/BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/jenkins_hash.o': can't open to read symbols: No such file or directory.
warning: /BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/linear_string_map.o': can't open to read symbols: No such file or directory. warning:/BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/miller_rabin.o': can't open to read symbols: No such file or directory.
warning: /BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/select.o': can't open to read symbols: No such file or directory. warning:/BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/vqueue.o': can't open to read symbols: No such file or directory.
warning: /BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/vstack.o': can't open to read symbols: No such file or directory. warning:/usr/local/Cellar/php55-xdebug/2.3.0/xdebug-2.3.0/.libs/usefulstuff.o': can't open to read symbols: No such file or directory.
warning: /usr/local/Cellar/php55-xdebug/2.3.0/xdebug-2.3.0/.libs/xdebug.o': can't open to read symbols: No such file or directory. warning:/usr/local/Cellar/php55-xdebug/2.3.0/xdebug-2.3.0/.libs/xdebug_branch_info.o': can't open to read symbols: No such file or directory.
warning: /usr/local/Cellar/php55-xdebug/2.3.0/xdebug-2.3.0/.libs/xdebug_code_coverage.o': can't open to read symbols: No such file or directory. warning:/usr/local/Cellar/php55-xdebug/2.3.0/xdebug-2.3.0/.libs/xdebug_com.o': can't open to read symbols: No such file or directory.
warning: /usr/local/Cellar/php55-xdebug/2.3.0/xdebug-2.3.0/.libs/xdebug_compat.o': can't open to read symbols: No such file or directory. warning:/usr/local/Cellar/php55-xdebug/2.3.0/xdebug-2.3.0/.libs/xdebug_handler_dbgp.o': can't open to read symbols: No such file or directory.
warning: /usr/local/Cellar/php55-xdebug/2.3.0/xdebug-2.3.0/.libs/xdebug_handlers.o': can't open to read symbols: No such file or directory. warning:/usr/local/Cellar/php55-xdebug/2.3.0/xdebug-2.3.0/.libs/xdebug_hash.o': can't open to read symbols: No such file or directory.
warning: /usr/local/Cellar/php55-xdebug/2.3.0/xdebug-2.3.0/.libs/xdebug_llist.o': can't open to read symbols: No such file or directory. warning:/usr/local/Cellar/php55-xdebug/2.3.0/xdebug-2.3.0/.libs/xdebug_private.o': can't open to read symbols: No such file or directory.
warning: /usr/local/Cellar/php55-xdebug/2.3.0/xdebug-2.3.0/.libs/xdebug_profiler.o': can't open to read symbols: No such file or directory. warning:/usr/local/Cellar/php55-xdebug/2.3.0/xdebug-2.3.0/.libs/xdebug_set.o': can't open to read symbols: No such file or directory.
warning: /usr/local/Cellar/php55-xdebug/2.3.0/xdebug-2.3.0/.libs/xdebug_stack.o': can't open to read symbols: No such file or directory. warning:/usr/local/Cellar/php55-xdebug/2.3.0/xdebug-2.3.0/.libs/xdebug_str.o': can't open to read symbols: No such file or directory.
warning: /usr/local/Cellar/php55-xdebug/2.3.0/xdebug-2.3.0/.libs/xdebug_superglobals.o': can't open to read symbols: No such file or directory. warning:/usr/local/Cellar/php55-xdebug/2.3.0/xdebug-2.3.0/.libs/xdebug_trace_computerized.o': can't open to read symbols: No such file or directory.
warning: /usr/local/Cellar/php55-xdebug/2.3.0/xdebug-2.3.0/.libs/xdebug_trace_html.o': can't open to read symbols: No such file or directory. warning:/usr/local/Cellar/php55-xdebug/2.3.0/xdebug-2.3.0/.libs/xdebug_trace_textual.o': can't open to read symbols: No such file or directory.
warning: /usr/local/Cellar/php55-xdebug/2.3.0/xdebug-2.3.0/.libs/xdebug_tracing.o': can't open to read symbols: No such file or directory. warning:/usr/local/Cellar/php55-xdebug/2.3.0/xdebug-2.3.0/.libs/xdebug_var.o': can't open to read symbols: No such file or directory.
warning: `/usr/local/Cellar/php55-xdebug/2.3.0/xdebug-2.3.0/.libs/xdebug_xml.o': can't open to read symbols: No such file or directory.
PHPUnit 4.5.0 by Sebastian Bergmann and contributors.

Configuration read from /Users/j0k/Sites/f43.me/phpunit.xml.dist

Starting test 'Api43\FeedBundle\Tests\Api43FeedBundleTest::testInitBundle'.
.
Starting test 'Api43\FeedBundle\Tests\Command\FetchItemsCommandTest::testNoParams'.

Program received signal SIGSEGV, Segmentation fault.
0x0000000102f77284 in add_line () from /usr/local/opt/php55-xdebug/xdebug.so
(gdb) bt full
#0 0x0000000102f77284 in add_line () from /usr/local/opt/php55-xdebug/xdebug.so
No symbol table info available.
#1 0x0000000102f812d9 in xdebug_hash_apply () from /usr/local/opt/php55-xdebug/xdebug.so
No symbol table info available.
0000002 0x0000000102f77109 in add_file () from /usr/local/opt/php55-xdebug/xdebug.so
No symbol table info available.
0000003 0x0000000102f812d9 in xdebug_hash_apply () from /usr/local/opt/php55-xdebug/xdebug.so
No symbol table info available.
0000004 0x00000001003a5763 in dtrace_execute_internal ()
No symbol table info available.
0000005 0x0000000102f7329a in xdebug_execute_internal () from /usr/local/opt/php55-xdebug/xdebug.so
No symbol table info available.
0000006 0x0000000100420812 in zend_do_fcall_common_helper_SPEC ()
No symbol table info available.
0000007 0x00000001003d7729 in execute_ex ()
No symbol table info available.
0000008 0x00000001003a569f in dtrace_execute_ex ()
No symbol table info available.
0000009 0x0000000102f72f69 in xdebug_execute_ex () from /usr/local/opt/php55-xdebug/xdebug.so
No symbol table info available.
0000010 0x0000000100420732 in zend_do_fcall_common_helper_SPEC ()
No symbol table info available.
0000011 0x00000001003d7729 in execute_ex ()
No symbol table info available.
0000012 0x00000001003a569f in dtrace_execute_ex ()
No symbol table info available.
0000013 0x0000000102f72f69 in xdebug_execute_ex () from /usr/local/opt/php55-xdebug/xdebug.so
No symbol table info available.
0000014 0x0000000100420732 in zend_do_fcall_common_helper_SPEC ()
No symbol table info available.
0000015 0x00000001003d7729 in execute_ex ()
No symbol table info available.
0000016 0x00000001003a569f in dtrace_execute_ex ()
No symbol table info available.
0000017 0x0000000102f72f69 in xdebug_execute_ex () from /usr/local/opt/php55-xdebug/xdebug.so
No symbol table info available.
0000018 0x0000000100420732 in zend_do_fcall_common_helper_SPEC ()
No symbol table info available.
0000019 0x00000001003d7729 in execute_ex ()
No symbol table info available.
0000020 0x00000001003a569f in dtrace_execute_ex ()
No symbol table info available.
0000021 0x0000000102f72f69 in xdebug_execute_ex () from /usr/local/opt/php55-xdebug/xdebug.so
No symbol table info available.
0000022 0x0000000100420732 in zend_do_fcall_common_helper_SPEC ()
No symbol table info available.
0000023 0x00000001003d7729 in execute_ex ()
No symbol table info available.
0000024 0x00000001003a569f in dtrace_execute_ex ()
No symbol table info available.
0000025 0x0000000102f72f69 in xdebug_execute_ex () from /usr/local/opt/php55-xdebug/xdebug.so
No symbol table info available.
0000026 0x0000000100420732 in zend_do_fcall_common_helper_SPEC ()
No symbol table info available.
0000027 0x00000001003d7729 in execute_ex ()
No symbol table info available.
---Type <return> to continue, or q <return> to quit---
0000028 0x00000001003a569f in dtrace_execute_ex ()
No symbol table info available.
0000029 0x0000000102f72f69 in xdebug_execute_ex () from /usr/local/opt/php55-xdebug/xdebug.so
No symbol table info available.
0000030 0x0000000100420732 in zend_do_fcall_common_helper_SPEC ()
No symbol table info available.
0000031 0x00000001003d7729 in execute_ex ()
No symbol table info available.
0000032 0x00000001003a569f in dtrace_execute_ex ()
No symbol table info available.
0000033 0x0000000102f72f69 in xdebug_execute_ex () from /usr/local/opt/php55-xdebug/xdebug.so
No symbol table info available.
0000034 0x0000000100420732 in zend_do_fcall_common_helper_SPEC ()
No symbol table info available.
#35 0x00000001003d7729 in execute_ex ()
No symbol table info available.
0000036 0x00000001003a569f in dtrace_execute_ex ()
No symbol table info available.
0000037 0x0000000102f72f69 in xdebug_execute_ex () from /usr/local/opt/php55-xdebug/xdebug.so
No symbol table info available.
0000038 0x0000000100420732 in zend_do_fcall_common_helper_SPEC ()
No symbol table info available.
0000039 0x00000001003d7729 in execute_ex ()
No symbol table info available.
0000040 0x00000001003a569f in dtrace_execute_ex ()
No symbol table info available.
0000041 0x0000000102f72f69 in xdebug_execute_ex () from /usr/local/opt/php55-xdebug/xdebug.so
No symbol table info available.
0000042 0x0000000100420732 in zend_do_fcall_common_helper_SPEC ()
No symbol table info available.
0000043 0x00000001003d7729 in execute_ex ()
No symbol table info available.
0000044 0x00000001003a569f in dtrace_execute_ex ()
No symbol table info available.
0000045 0x0000000102f72f69 in xdebug_execute_ex () from /usr/local/opt/php55-xdebug/xdebug.so
No symbol table info available.
0000046 0x00000001003b38d6 in zend_execute_scripts ()
No symbol table info available.
0000047 0x000000010035e938 in php_execute_script ()
No symbol table info available.
0000048 0x0000000100442f28 in do_cli ()
No symbol table info available.
#49 0x0000000100441b8e in main ()
No symbol table info available.
(gdb)

=======================================================

And the third one using 2.3.1:

j0k@MBP:~/Sites/f43.me$ sudo gdb --args php which phpunit --coverage-html=build/coverage --debug
Password:
GNU gdb (GDB) 7.8.2
Copyright (C) 2014 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-apple-darwin14.1.0".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from php...(no debugging symbols found)...done.
(gdb) run
Starting program: /usr/local/bin/php /Users/j0k/.composer/vendor/bin/phpunit --coverage-html=build/coverage --debug
warning: Could not open OSO archive file "/BinaryCache/corecrypto/corecrypto-233.1.2~26/Symbols/BuiltProducts/libcorecrypto_static.a"
warning: /BinaryCache/coreTLS/coreTLS-35.1.2~2/Objects/coretls.build/coretls.build/Objects-normal/x86_64/system_coretls_vers.o': can't open to read symbols: No such file or directory. warning: Could not open OSO archive file "/BinaryCache/coreTLS/coreTLS-35.1.2~2/Symbols/BuiltProducts/libcoretls_ciphersuites.a" warning: Could not open OSO archive file "/BinaryCache/coreTLS/coreTLS-35.1.2~2/Symbols/BuiltProducts/libcoretls_handshake.a" warning: Could not open OSO archive file "/BinaryCache/coreTLS/coreTLS-35.1.2~2/Symbols/BuiltProducts/libcoretls_record.a" warning: Could not open OSO archive file "/BinaryCache/coreTLS/coreTLS-35.1.2~2/Symbols/BuiltProducts/libcoretls_stream_parser.a" warning:/BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/bdz.o': can't open to read symbols: No such file or directory.
warning: /BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/bdz_ph.o': can't open to read symbols: No such file or directory. warning:/BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/bmz.o': can't open to read symbols: No such file or directory.
warning: /BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/bmz8.o': can't open to read symbols: No such file or directory. warning:/BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/brz.o': can't open to read symbols: No such file or directory.
warning: /BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/buffer_entry.o': can't open to read symbols: No such file or directory. warning:/BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/buffer_manager.o': can't open to read symbols: No such file or directory.
warning: /BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/chd.o': can't open to read symbols: No such file or directory. warning:/BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/chd_ph.o': can't open to read symbols: No such file or directory.
warning: /BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/chm.o': can't open to read symbols: No such file or directory. warning:/BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/cmph.o': can't open to read symbols: No such file or directory.
warning: /BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/cmph_structs.o': can't open to read symbols: No such file or directory. warning:/BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/compressed_rank.o': can't open to read symbols: No such file or directory.
warning: /BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/compressed_seq.o': can't open to read symbols: No such file or directory. warning:/BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/fch.o': can't open to read symbols: No such file or directory.
warning: /BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/fch_buckets.o': can't open to read symbols: No such file or directory. warning:/BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/graph.o': can't open to read symbols: No such file or directory.
warning: /BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/hash.o': can't open to read symbols: No such file or directory. warning:/BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/jenkins_hash.o': can't open to read symbols: No such file or directory.
warning: /BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/linear_string_map.o': can't open to read symbols: No such file or directory. warning:/BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/miller_rabin.o': can't open to read symbols: No such file or directory.
warning: /BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/select.o': can't open to read symbols: No such file or directory. warning:/BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/vqueue.o': can't open to read symbols: No such file or directory.
warning: `/BinaryCache/cmph/cmph-1~1091/Objects/cmph.build/cmph.build/Objects-normal/x86_64/vstack.o': can't open to read symbols: No such file or directory.
PHPUnit 4.5.0 by Sebastian Bergmann and contributors.

Configuration read from /Users/j0k/Sites/f43.me/phpunit.xml.dist

Starting test 'Api43\FeedBundle\Tests\Api43FeedBundleTest::testInitBundle'.
.
Starting test 'Api43\FeedBundle\Tests\Command\FetchItemsCommandTest::testNoParams'.
.
Starting test 'Api43\FeedBundle\Tests\Command\FetchItemsCommandTest::testWrongSlug'.
.
Starting test 'Api43\FeedBundle\Tests\Command\FetchItemsCommandTest::testHN'.
.
Starting test 'Api43\FeedBundle\Tests\Command\FetchItemsCommandTest::testNew'.
.
Starting test 'Api43\FeedBundle\Tests\Command\FetchItemsCommandTest::testOld'.
.
Starting test 'Api43\FeedBundle\Tests\Command\RemoveItemsCommandTest::testRemoveAllAvailable'.
.
Starting test 'Api43\FeedBundle\Tests\Command\RemoveItemsCommandTest::testRemoveForOneFeed'.
.
Starting test 'Api43\FeedBundle\Tests\Command\RemoveItemsCommandTest::testRemoveBadSlug'.
.
Starting test 'Api43\FeedBundle\Tests\Command\RemoveItemsCommandTest::testRemoveAllMaxYes'.
.
Starting test 'Api43\FeedBundle\Tests\Command\RemoveItemsCommandTest::testRemoveAllMaxNo'.
.
Starting test 'Api43\FeedBundle\Tests\Command\RemoveItemsCommandTest::testRemove'.
.
Starting test 'Api43\FeedBundle\Tests\Controller\FeedControllerTest::testIndex'.
.
Starting test 'Api43\FeedBundle\Tests\Controller\FeedControllerTest::testUnAuthorized'.
.
Starting test 'Api43\FeedBundle\Tests\Controller\FeedControllerTest::testDashboard'.
.
Starting test 'Api43\FeedBundle\Tests\Controller\FeedControllerTest::testFeeds'.
.
Starting test 'Api43\FeedBundle\Tests\Controller\FeedControllerTest::testFeedNew'.

Program received signal SIGSEGV, Segmentation fault.
0x0000000102e80e95 in xdebug_hash_extended_find () from /usr/local/opt/php55-xdebug/xdebug.so
(gdb) bt full
#0 0x0000000102e80e95 in xdebug_hash_extended_find () from /usr/local/opt/php55-xdebug/xdebug.so
No symbol table info available.
#1 0x0000000102e771a0 in prefill_from_oparray () from /usr/local/opt/php55-xdebug/xdebug.so
No symbol table info available.
0000002 0x0000000102e76e94 in xdebug_prefill_code_coverage () from /usr/local/opt/php55-xdebug/xdebug.so
No symbol table info available.
0000003 0x0000000102e7736e in xdebug_code_coverage_start_of_function () from /usr/local/opt/php55-xdebug/xdebug.so
No symbol table info available.
0000004 0x0000000102e7390a in xdebug_execute_ex () from /usr/local/opt/php55-xdebug/xdebug.so
No symbol table info available.
0000005 0x0000000100420732 in zend_do_fcall_common_helper_SPEC ()
No symbol table info available.
0000006 0x00000001003d7729 in execute_ex ()
No symbol table info available.
0000007 0x00000001003a569f in dtrace_execute_ex ()
No symbol table info available.
0000008 0x0000000102e739a4 in xdebug_execute_ex () from /usr/local/opt/php55-xdebug/xdebug.so
No symbol table info available.
0000009 0x0000000100420732 in zend_do_fcall_common_helper_SPEC ()
No symbol table info available.
0000010 0x00000001003d7729 in execute_ex ()
No symbol table info available.
0000011 0x00000001003a569f in dtrace_execute_ex ()
No symbol table info available.
0000012 0x0000000102e739a4 in xdebug_execute_ex () from /usr/local/opt/php55-xdebug/xdebug.so
No symbol table info available.
0000013 0x0000000100420732 in zend_do_fcall_common_helper_SPEC ()
No symbol table info available.
0000014 0x00000001003d7729 in execute_ex ()
No symbol table info available.
0000015 0x00000001003a569f in dtrace_execute_ex ()
No symbol table info available.
0000016 0x0000000102e739a4 in xdebug_execute_ex () from /usr/local/opt/php55-xdebug/xdebug.so
No symbol table info available.
0000017 0x0000000100420732 in zend_do_fcall_common_helper_SPEC ()
No symbol table info available.
0000018 0x00000001003d7729 in execute_ex ()
No symbol table info available.
0000019 0x00000001003a569f in dtrace_execute_ex ()
No symbol table info available.
0000020 0x0000000102e739a4 in xdebug_execute_ex () from /usr/local/opt/php55-xdebug/xdebug.so
No symbol table info available.
0000021 0x0000000100420732 in zend_do_fcall_common_helper_SPEC ()
No symbol table info available.
0000022 0x00000001003d7729 in execute_ex ()
No symbol table info available.
0000023 0x00000001003a569f in dtrace_execute_ex ()
No symbol table info available.
0000024 0x0000000102e739a4 in xdebug_execute_ex () from /usr/local/opt/php55-xdebug/xdebug.so
No symbol table info available.
0000025 0x0000000100420732 in zend_do_fcall_common_helper_SPEC ()
No symbol table info available.
0000026 0x00000001003d7729 in execute_ex ()
No symbol table info available.
0000027 0x00000001003a569f in dtrace_execute_ex ()
No symbol table info available.
---Type <return> to continue, or q <return> to quit---
0000028 0x0000000102e739a4 in xdebug_execute_ex () from /usr/local/opt/php55-xdebug/xdebug.so
No symbol table info available.
0000029 0x0000000100420732 in zend_do_fcall_common_helper_SPEC ()
No symbol table info available.
0000030 0x00000001003d7729 in execute_ex ()
No symbol table info available.
0000031 0x00000001003a569f in dtrace_execute_ex ()
No symbol table info available.
0000032 0x0000000102e739a4 in xdebug_execute_ex () from /usr/local/opt/php55-xdebug/xdebug.so
No symbol table info available.
0000033 0x0000000100420732 in zend_do_fcall_common_helper_SPEC ()
No symbol table info available.
0000034 0x00000001003d7729 in execute_ex ()
No symbol table info available.
#35 0x00000001003a569f in dtrace_execute_ex ()
No symbol table info available.
0000036 0x0000000102e739a4 in xdebug_execute_ex () from /usr/local/opt/php55-xdebug/xdebug.so
No symbol table info available.
0000037 0x00000001003b38d6 in zend_execute_scripts ()
No symbol table info available.
0000038 0x000000010035e938 in php_execute_script ()
No symbol table info available.
0000039 0x0000000100442f28 in do_cli ()
No symbol table info available.
0000040 0x0000000100441b8e in main ()
No symbol table info available.
(gdb)

I think this is similar to 0001117 - could you please try the latest version from the "xdebug_2_3" branch in Github to see whether I've already fixed it?

You're right, this work great when using the "xdebug_2_3" branch !

Perfect, I'll mark this as fixed then. A 2.3.2 release will likely follow next week.