QA build, only for test

PHP version 7.3.13RC1 (05 Dec 2019)

Core:

• Fixed bug #78787 (Segfault with trait overriding inherited private shadow property). (Nikita)
• Fixed bug #78868 (Calling __autoload() with incorrect EG(fake_scope) value). (Antony Dovgal, Dmitry)
• Fixed bug #78296 (is_file fails to detect file). (cmb)

GD:

• Fixed bug #78849 (GD build broken with -D SIGNED_COMPARE_SLOW). (cmb)

MBString:

• Upgraded bundled Oniguruma to 6.9.4. (cmb)

OPcache:

• Fixed potential ASLR related invalid opline handler issues. (cmb)
• Fixed $x = (bool)$x; with opcache (should emit undeclared variable notice). (Tyson Andre)

PCRE:

• Fixed bug #78853 (preg_match() may return integer > 1). (cmb)

Standard:

• Fixed bug #78759 (array_search in $GLOBALS). (Nikita)
• Fixed bug #77638 (var_export'ing certain class instances segfaults). (cmb)
• Fixed bug #78840 (imploding $GLOBALS crashes). (cmb)
• Fixed bug #78833 (Integer overflow in pack causes out-of-bound access). (cmb)
• Fixed bug #78814 (strip_tags allows / in tag name => whitelist bypass). (cmb)