Fix memory leak(null coalescing operator with Spl hash)

The SEPARATE_ARG_IF_REF macro increased the refcount of the object passed as a
key.
However, when the key did not exist in the

Fix memory leak(null coalescing operator with Spl hash)

The SEPARATE_ARG_IF_REF macro increased the refcount of the object passed as a
key.
However, when the key did not exist in the ArrayAccess implementation,
the code returned early without trying to decrement the refcount.

Add a test of `??` succeeding+failing on a SplObjectStorage instance.

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Cleanup zend_std_call_setter

__set() does not use the return value to indicate success, and at
this point I doubt it ever will.

Revert "Fixed bug #73067 (__debugInfo crashes when throwing an exception)"

This reverts commit 2d8ab51576695630a7471ff829cc5ea10becdc0f.

Revert "Fixed bug #73067 (__debugInfo crashes when throwing an exception)"

This reverts commit 2d8ab51576695630a7471ff829cc5ea10becdc0f.

Fixed bug #73067 (__debugInfo crashes when throwing an exception)

Fixed bug #72813 (Segfault with __get returned by ref)

This should be safe change, as we don't dereference value and member
after calling setter/getter.

And compare to adding un

Fixed bug #72813 (Segfault with __get returned by ref)

This should be safe change, as we don't dereference value and member
after calling setter/getter.

And compare to adding unref codes, this is much cheaper.

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Implemented RFC: Fix inconsistent behavior of $this variable
Squashed commit of the following:

commit bdd3b6895c3ce3eacfcf7d4bf4feb8dfa61801fd
Author: Dmitry Stogov <dmitry@zend.com>

Implemented RFC: Fix inconsistent behavior of $this variable
Squashed commit of the following:

commit bdd3b6895c3ce3eacfcf7d4bf4feb8dfa61801fd
Author: Dmitry Stogov <dmitry@zend.com>
Date: Thu Jun 16 00:19:42 2016 +0300

Fixed GOTO VM

commit 2f1d7c8b89ce821086d357cf65f629f040a85c03
Author: Dmitry Stogov <dmitry@zend.com>
Date: Wed Jun 15 21:01:57 2016 +0300

Removed unused variable

commit cf749c42b0b1919f70b1e7d6dcbfff76899506af
Author: Dmitry Stogov <dmitry@zend.com>
Date: Wed Jun 15 19:06:16 2016 +0300

Protection from $this reassign through mb_parse_str()

commit 59a9a6c83c66b666971e57f1173b33a422166efd
Author: Dmitry Stogov <dmitry@zend.com>
Date: Wed Jun 15 18:14:50 2016 +0300

Added type inference rule for FETCH_THIS opcode

commit 73f8d14a856f14a461430b3c7534ab2ce870cbf6
Author: Dmitry Stogov <dmitry@zend.com>
Date: Wed Jun 15 18:11:18 2016 +0300

Restored PHP-7 behavior of isset($this->foo).
It throws exception if not in object context.
Removed useless opcode handlers.

commit fa0881381e8ae97e022ae5d1ec0851c952f33c82
Author: Dmitry Stogov <dmitry@zend.com>
Date: Tue May 31 12:25:47 2016 +0300

Changed "Notice: Undefined variable: this" into "Exception: Using $this when not in object context".

commit e32cc528c0f2c97963d8ec83eff0269f1f45af18
Author: Dmitry Stogov <dmitry@zend.com>
Date: Tue May 24 02:02:43 2016 +0300

Throw exception on attempt to re-assign $this through extract() and parse_str().

commit 41f1531b52113ec8a4c208aa6b9ef50f1386bb3f
Author: Dmitry Stogov <dmitry@zend.com>
Date: Mon May 23 22:18:36 2016 +0300

Fixed inconsistent $this behavior

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Allow empty property names

Conflicts:
Zend/zend_compile.c

Fixed bug #72177 (Scope issue in __destruct after ReflectionProperty::setValue())

Intern some known (and offten used) strings.

Strlen cleanup (additions for previous one fix)

Probably compilers will do similar optimization

Revert "Refactor zval cleanup into single function"

This reverts commit bac6fdb0c52c924e726c5a78de8858bf27b6586b.

Refactor zval cleanup into single function

Also use zval_ptr_dtor_nogc() everywhere in Zend in favor of zval_dtor()

This function needs to be exported for extensions that implement complex zend objects

Fix leak in guards patch

- get rid of EG(scope). zend_get_executed_scope() should be used instead.
- ichanged zval_update_constant_ex(). Use IS_TYPE_IMMUTABLE flag on shared constants and AST, instead of "inline_change"

- get rid of EG(scope). zend_get_executed_scope() should be used instead.
- ichanged zval_update_constant_ex(). Use IS_TYPE_IMMUTABLE flag on shared constants and AST, instead of "inline_change" parameter.

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Optimize property guards for the most usual case with only one acive guard.

fix standard object handler for properties when type == BP_VAR_IS

fix standard object handler for properties when type == BP_VAR_IS

Fixed bug #71731

The read_dimension() handler in BP_VAR_IS mode will now call
offsetExists() before caling offsetGet(). This has always been a
problem, however recently the issue has

Fixed bug #71731

The read_dimension() handler in BP_VAR_IS mode will now call
offsetExists() before caling offsetGet(). This has always been a
problem, however recently the issue has been exacerbated, because
the null-coalesce operator ?? makes it visible for non-nested
array accesses.

Also fixes #69659.

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Fix use of UNDEF instead of NULL in read_dimension

Fixed bug #71474 (Crash because of VM stack corruption on Magento2).

bump year which is missed in rev 49493a2

bump year which is missed in rev 49493a2

Fixed Bug #70967 (Weird error handling for __toString when Error is thrown)