This release fixes 45 issues! 🎉

Improvements 🔧

• Emit virtual Assign node for List_ destructuring in foreach value position (#5504), #8075
• Narrow array key type after type-checking the key variable inside a foreach loop (#5505), #7076
• Support for static::SOME_CONST in PHPDoc (#5510), #13828, thanks @VincentLanglet!
• Allow GMP in increment/decrement operations (#5530), thanks @Firehed!

Bugfixes 🐛

• Various array fixes (#5523), #7893, #2294, #14448, #11146, #11533, #13699, #13623, #13304, #12653, #3795, #14336, #11820, #13000, #13643, #13272, #13663, #10349, #8648
  • Preserve constant array when assigning a union of scalars
  • Preserve tracked nested ArrayDimFetch types through chained assignments
  • More precise analysis for foreach iterating over constant array
• Resolve ConditionalTypeForParameter children before converting to ConditionalType to prevent infinite traversal (#5507), #13872
• Merge scope after ?-> method call to account for argument short-circuiting (#5456), #10729, thanks @VincentLanglet and @staabm!
• Track PHPDoc and modifier flags on ExportedParameterNode for result cache invalidation (#5518), #14520
• Autoloading should not be invoked for any string (#5519), #14514, #14511, thanks @staabm!
• More precise tracking $value in foreach (#5526)
• Correctly mark all unpacked constant array items as optional in array_merge/array_replace (#5525), #14526
• Fix: False positive: Conditional return type takes the wrong branch (#5362), #11565, thanks @VincentLanglet and @staabm!
• Fix: Allow readonly property init in child classes on PHP 8.4+ (#5513), #12871, thanks @predictor2718!
• Project narrowings through stored booleans for more expression kinds (#5528), #9455, #5207
• Track array_walk by-ref closure parameter modifications on array type (#5527), #14525
• Merge conditional-expression holders for the same target (#5529), #12677
• Project stored-boolean narrowings through || truthy, Track destructure relationships across tagged-union foreach (#5531), #9519
• Fix: Template of imported type breaks imported type (#5360), #11314, #7152, #13332, thanks @VincentLanglet and @staabm!
• Track $arr[$key] existence across array_key_first/last + !== null (#5537)
• Preserve TemplateArrayType across offset writes and traversal (#5553), #10749
• Two-stage collapse for oversized constant arrays (#5555), #8636
• Fix callable array intersection type offset narrowing (#5548), #3842, thanks @VincentLanglet and @staabm!

Performance 🏎️

• Cache class constant fetch type (phpstan/phpstan-src@a8704ac)

Function signature fixes 🤖

• Make bcround pure (#5499), thanks @still-dreaming-1!
• Make bcfloor, bcceil pure (#5509), thanks @staabm!
• Declare multiple apcu_ functions as impure (#5516), #14519, thanks @madmajestro!
• Declare Memcached methods as impure (#5536), #13444, #14534, thanks @VincentLanglet!

Internals 🔍

• BenchCase - enable Bleeding Edge (phpstan/phpstan-src@99c018e)
• Revert fix (#5520), thanks @staabm!
• Fix PHPUnit warnings (#5522), thanks @staabm!
• Add non regression test (#5540), #2940, thanks @VincentLanglet!
• Add non regression test (#5545), #4352, thanks @VincentLanglet!