Sourced from vimeo/psalm's releases.

Prevent crash when analysing some isset conditions

Fixes vimeo/psalm#3133

Bugfixes

• Allow templated value T as X where X&static is expected (#3127)
• Evaluate out class constants wherever possible (#3128)
• Only apply loop clauses where applicable (#3125)

Conditional types & faster --diff mode

Features

Conditional Return Types

Psalm now supports conditional return types.

Improved --diff mode

Psalm's --diff mode should now produce all the same issues that running without --diff does (#3024, #3032)

Additionally, it should now run much faster for small changesets.

With this change, --diff-methods is now implied when running --diff.

Improve detection of problematic array types

Previously when dealing with arrays the mixed type subsumed everything in its path. Since Psalm converts any bare PHP array types to array<array-key, mixed>, that mixed type can hide real bugs, such as in the following code: https://psalm.dev/r/a97351e870 (this corresponds to code that caused an outage on vimeo.com).

This version of Psalm introduces slightly more careful array handling, and allows unions on mixed inside arrays in certain circumstances to allow you to catch more of these sorts of errors.

Other features

• @psalm-property-read and @psalm-property-write are now supported as prefixed versions of @property-read and @property-write - thanks @iggyvolz (#3013)
• Psalter can now be run without using cache (via --no-cache) - thanks @orklah!
• You can now use a @psalm-trace annotation to figure out what type Psalm infers for a given variable – thanks @m0003r (#3080, #3106)
• Docblock inheritance for function params is now just position-dependent, not name dependent as previously (#2722)

Bugfixes

• improve handling of templated assertions when calling array_filter (#3008)
• fix templating of properties (#3027, #3035)
• @return static is now enforced in places it should have been, but was not
• variables set in conditional branches of while expressions are now more completely understood (#3034)
• Psalter don’t suggest hard return types for functions that don’t always return (#3030)
• Allow __invoke to be called on unions with non-objects (#3033)
• Allow inheritance from classes that only exist in stubs (#2191)
• Fix class constant access rules for constant defined in subclass (#3014)
• Use a better method for determining switch case complexity, preventing crashes (#2728)
• @LeSuisse updated the return value of zip_open
• Improve handling of generators (#3058, #3057)
• Prevent array_key_exists calls from changing the array type (#3061)

... (truncated)

• d470903 Make Algebra::negateFormula a little more safe
• a25610c Fix #3133 - prevent crash when analysing isset
• 8533b86 Simplify template bounds message
• e17cfd8 Fix #3125 - only apply clauses where applicable
• 633b210 Fix test
• 73f8f96 Expand out class constants as early as possible
• 15df39f Fix #3127 - allow templated param to be accepted where static is expected
• 2939455 Update MixedArgumentTypeCoercion.md (#3129)
• 5bc9b09 Allow memoisation of ArrayAccess::offsetGet
• 5988149 Prevent checking assertions on $this-> types, always accessible
• Additional commits viewable in compare view

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