0001334: Crash when using xdebug_start_code_coverage(XDEBUG_CC_UNUSED) with php -S - MantisBT

ID	Project	Category	View Status	Date Submitted	Last Update

0001334	Xdebug	Stacktraces	public	2016-07-31 13:46	2016-08-03 08:19

Reporter	bluewind	Assigned To	derick
Priority	normal	Severity	crash	Reproducibility	always
Status	resolved	Resolution	no change required
Platform	Linux	OS	Arch Linux	OS Version	n/a
Product Version	2.4.0
Fixed in Version	2.4.1

Summary	0001334: Crash when using xdebug_start_code_coverage(XDEBUG_CC_UNUSED) with php -S
Description	When collecting code coverage information with XDEBUG_CC_UNUSED enabled, the php dev webserver (also php-fpm) crashes. I discovered this by trying to collect coverage data from my test suite which uses the php server to test actual API requests sent to my application. The backtrace looks different, but removing XDEBUG_CC_UNUSED in my test suite also fixes the problem. I'm not entirely certain if it is the actual bug I'm hitting though since I don't need to issue 2 requests when I hit this in my application. Running the example without XDEBUG_CC_UNUSED works just fine.
Steps To Reproduce	echo '<?php xdebug_start_code_coverage(XDEBUG_CC_UNUSED);' > test.php php -S 127.0.0.1:8080 & sleep 1 curl http://127.0.0.1:8080/test.php curl http://127.0.0.1:8080/test.php # yes, twice
Additional Information	*Error in `php': double free or corruption (out): 0x000000000154bb40* ======= Backtrace: ========= /usr/lib/libc.so.6(+0x6ed4b)[0x7f9fa11eed4b] /usr/lib/libc.so.6(+0x74546)[0x7f9fa11f4546] /usr/lib/libc.so.6(+0x74d1e)[0x7f9fa11f4d1e] /usr/lib/php/modules/xdebug.so(xdebug_path_info_dtor+0x38)[0x7f9fa00878b8] /usr/lib/php/modules/xdebug.so(zm_post_zend_deactivate_xdebug+0x245)[0x7f9fa0083a15] php(zend_post_deactivate_modules+0x2a)[0x69072a] php(php_request_shutdown+0x485)[0x629155] php[0x726fb2] php[0x7275ae] php[0x728490] php[0x432b87] /usr/lib/libc.so.6(__libc_start_main+0xf1)[0x7f9fa11a0741] php(_start+0x29)[0x432d89] ======= Memory map: ======== [...] Jul 31 15:38:07 Marin systemd-coredump[6924]: Process 6914 (php) of user 1000 dumped core. Stack trace of thread 6914: #0 0x00007f9fa11b3295 raise (libc.so.6) #1 0x00007f9fa11b46da abort (libc.so.6) #2 0x00007f9fa11eed50 __libc_message (libc.so.6) #3 0x00007f9fa11f4546 malloc_printerr (libc.so.6) #4 0x00007f9fa11f4d1e _int_free (libc.so.6) #5 0x00007f9fa00878b8 xdebug_path_info_dtor (xdebug.so) #6 0x00007f9fa0083a15 zm_post_zend_deactivate_xdebug (xdebug.so) #7 0x000000000069072a zend_post_deactivate_modules (php) #8 0x0000000000629155 php_request_shutdown (php) #9 0x0000000000726fb2 n/a (php) #10 0x00000000007275ae n/a (php) #11 0x0000000000728490 n/a (php) #12 0x0000000000432b87 n/a (php) #13 0x00007f9fa11a0741 __libc_start_main (libc.so.6) #14 0x0000000000432d89 _start (php)
Tags	No tags attached.

Operating System	Arch Linux
PHP Version	7.0.5-7.0.9

derick 2016-08-02 18:45 administrator ~0003663	Could you try Xdebug 2.4.1 please? It is possible that that fixes your problem.

bluewind 2016-08-02 19:00 reporter ~0003664	2.4.1 fixes the problem, yes. Thanks!

derick 2016-08-03 08:19 administrator ~0003665	Perfect, closing this out then.

Date Modified	Username	Field	Change
2016-07-31 13:46	bluewind	New Issue
2016-08-02 18:45	derick	Note Added: 0003663
2016-08-02 18:45	derick	Assigned To	=> derick
2016-08-02 18:45	derick	Status	new => feedback
2016-08-02 19:00	bluewind	Note Added: 0003664
2016-08-02 19:00	bluewind	Status	feedback => assigned
2016-08-03 08:19	derick	Note Added: 0003665
2016-08-03 08:19	derick	Status	assigned => resolved
2016-08-03 08:19	derick	Fixed in Version	=> 2.4.1
2016-08-03 08:19	derick	Resolution	open => no change required