Fix leak with nullsafe operator with constant LHS

Followup to 5303bcdd32e8171399c2c60bf431e5304a66c39a. We need to
perform the addref after emitting the opline, because that might
in

Fix leak with nullsafe operator with constant LHS

Followup to 5303bcdd32e8171399c2c60bf431e5304a66c39a. We need to
perform the addref after emitting the opline, because that might
intern the string.

Fixes oss-fuzz #24479.

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Fix use-after-free when nullsafe used with constant LHS

Fixes oss-fuzz #24436.

Fix null pointer deref in compile_return()

Fixes oss-fuzz #24387.

Make nested ternary without parentheses a compile error

This was deprecated in PHP 7.4.

Implement nullsafe ?-> operator

RFC: https://wiki.php.net/rfc/nullsafe_operator

Closes GH-5619.

Co-authored-by: Nikita Popov <nikita.ppv@gmail.com>

Treat namespaced names as single token

Namespace names are now lexed as single tokens of type
T_NAME_QUALIFIED, T_NAME_FULLY_QUALIFIED or T_NAME_RELATIVE.

RFC: https://wiki.php.

Treat namespaced names as single token

Namespace names are now lexed as single tokens of type
T_NAME_QUALIFIED, T_NAME_FULLY_QUALIFIED or T_NAME_RELATIVE.

RFC: https://wiki.php.net/rfc/namespaced_names_as_token

Closes GH-5827.

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Add common code for magic method assignment

This was repeated three times.

Unify magic method visibility check

This was missing entirely for the internal function case.

Unify magic method return type checks

Unify static/non-static check for magic methods

And promote it to be fatal.

Fixed bug #79867

In line with usual rules, give untyped properties a null default
value. Otherwise constructor promotion would give you a property
declaration that cannot be achieved

Fixed bug #79867

In line with usual rules, give untyped properties a null default
value. Otherwise constructor promotion would give you a property
declaration that cannot be achieved through any other means.

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Ignore inheritance rules on private methods

Closes GH-5401

Fix free of uninitialized memory in MATCH_ERROR

As suggested by Tyson Andre:
https://github.com/php/php-src/pull/5371#issuecomment-657081464

Also fix line number of unhandled ma

Fix free of uninitialized memory in MATCH_ERROR

As suggested by Tyson Andre:
https://github.com/php/php-src/pull/5371#issuecomment-657081464

Also fix line number of unhandled match error

Closes GH-5841.

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Review the usage of apostrophes in error messages

Closes GH-5590

Add missing addref for MATCH_ERROR operand

Implement match expression

RFC: https://wiki.php.net/rfc/match_expression_v2

Closes GH-5371.

Skip special function optimization for redeclared disabled functions

As pointed out on GH-5817.

Merge branch 'PHP-7.4'

* PHP-7.4:
Fixed bug #79783

Fixed bug #79783

Make sure we don't drop the by-reference check when passing the
result of a VM builtin function.

refactor: class constants parsing

As part of my work on typed class constants, I wanted to make a
separate pull request for unrelated changes.

These include:

* Moving

refactor: class constants parsing

As part of my work on typed class constants, I wanted to make a
separate pull request for unrelated changes.

These include:

* Moving from ast->child[0]->attr to ast->attr
* Making zend_ast_export_ex() export class constants' visibility
* Extracting an additional zend_compile_class_const_group() function

Closes GH-5812.

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Treat attribute argument lists like normal argument lists

Allow trailing comma. Syntactically allow unpacking, but forbid it
during compilation.

The trailing comma test-case is

Treat attribute argument lists like normal argument lists

Allow trailing comma. Syntactically allow unpacking, but forbid it
during compilation.

The trailing comma test-case is adopted from GH-5796.

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Implement Attribute Amendments.

RFC: https://wiki.php.net/rfc/attribute_amendments

Support for attribute grouping is left out, because the short
attribute syntax RFC will likely

Implement Attribute Amendments.

RFC: https://wiki.php.net/rfc/attribute_amendments

Support for attribute grouping is left out, because the short
attribute syntax RFC will likely make it obsolete.

Closes GH-5751.

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Cache __unserialize() instead of unserialize()

We should use these cache slots for the new object serialization
mechanism rather than the old one.

Fixed bug #79740

Use ZEND_TOSTRING_FUNC_NAME

Closes GH-5736.