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<?php class Foo { function test() { var_dump(debug_print_backtrace(true)); } } class Bar { public function __construct() { $foo = new Foo(); $foo->test(); } } $bar = new Bar();
Output for git.master, git.master_jit, rfc.property-hooks
#0 /in/FG9Z4(17): Foo->test() #1 /in/FG9Z4(21): Bar->__construct() NULL

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