In the following code:

<?php

class bar

{

public static function fc(string $a): string

{

return self::nested(

self::nested( //this line is marked as uncovered

$a

)

);

}

Xdebug does not see an executable line on the commented line. VLD indicates this is the INIT_STATIC_METHOD_CALL opcode:

line     #* E I O op                           fetch          ext  return  operands

4 0 E > EXT_NOP
1 RECV !0
6 2 EXT_STMT
3 INIT_STATIC_METHOD_CALL 'nested'
7 4 INIT_STATIC_METHOD_CALL 'nested'
8 5 SEND_VAR !0