Bug #71013 [Csd]: Incorrect exception handler with `yield from`

Edit report at https://bugs.php.net/bug.php?id=71013&edit=1 ID: 71013 Updated by: bwoebi@php.net Reported by: srice at fb dot com Summary: Incorrect exception handler with yield from Status: Closed Type: Bug Package: Scripting Engine problem Operating System: Linux PHP Version: 7.0.0RC8 Assigned To: bwoebi Block user comment: N Private report: N New Comment: Sorry that it took so long, but I was working on something else first ;-) Nice find though and … fixed! Previous Comments: ------------------------------------------------------------------------ [2015-12-06 01:56:09] bwoebi@php.net Automatic comment on behalf of bobwei9@hotmail.com Revision: http://git.php.net/?p=php-src.git;a=commit;h=559ede17e109adec5dadff3290090e7141ad40ae Log: Fixed bug #71013 (Incorrect exception handler with yield from) ------------------------------------------------------------------------ [2015-12-06 01:54:42] bwoebi@php.net Automatic comment on behalf of bobwei9@hotmail.com Revision: http://git.php.net/?p=php-src.git;a=commit;h=559ede17e109adec5dadff3290090e7141ad40ae Log: Fixed bug #71013 (Incorrect exception handler with yield from) ------------------------------------------------------------------------ [2015-12-02 18:28:08] srice at fb dot com Description: ------------ yield from seems to sometimes be executing the incorrect catch block when handling exceptions. When the exception is thrown during the execution of the generator, rather than as an explicit throw() call, it seems that sometimes catch blocks from calling frames can be skipped. Test script: --------------- There are two scripts which exhibit incorrect behavior. 1) https://3v4l.org/KLdee In this example, notice the catch block in bar() is executed, when really the exception happened inside of the yield from in the try block, so the catch block in foo() should be executed. 2) https://3v4l.org/oMdRC In this example (which is only different from the previous example by the addition of the yield 1 in foo() and an equivalent next() in bar()), notice that neither of the exception handlers are called. Expected result: ---------------- For both 1) and 2) Starting bar() Constructing new FooBar Destructing FooBar [foo()] Caught Exception NULL Unsetting $x Finishing bar() Actual result: -------------- 1) Starting bar() Constructing new FooBar Destructing FooBar [bar()] Caught Exception Unsetting $x Finishing bar() 2) Starting bar() Constructing new FooBar Destructing FooBar Fatal error: Uncaught Exception in /in/oMdRC:6 Stack trace: #0 [internal function]: FooBar->current() #1 /in/oMdRC(26): Generator->next() #2 /in/oMdRC(37): bar() #3 {main} thrown in /in/oMdRC on line 6 Process exited with code 255. ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=71013&edit=1