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Resolve template return type T when a class-string<T> parameter is narrowed to a constant class-string #30263

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Resolve template return type T when a class-string<T> parameter is narrowed to a constant class-string

Resolve template return type T when a class-string<T> parameter is narrowed to a constant class-string #30263

Triggered via pull request June 13, 2026 22:27
@phpstan-botphpstan-bot
opened #5864
phpstan-bot:create-pull-request/patch-d165epn
Status Failure
Total duration 15m 41s
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tests.yml

on: pull_request
Matrix: Tests PHPUnit 12.x
Determine levels tests matrix
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Determine levels tests matrix
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2 errors, 2 warnings, and 8 notices
Mutation Testing (8.4, ubuntu-latest)
Process completed with exit code 1.
Mutation Testing (8.3, ubuntu-latest)
Process completed with exit code 1.
Mutation Testing (8.4, ubuntu-latest): src/Rules/FunctionReturnTypeCheck.php#L140
Escaped Mutant for Mutator "PHPStan\Infection\TrinaryLogicMutator": @@ @@ $map = TemplateTypeMap::createEmpty(); foreach ($function->getParameters() as $parameter) { $parameterType = $parameter->getType(); - if (!$parameterType->isClassString()->yes()) { + if ($parameterType->isClassString()->no()) { continue; }
Mutation Testing (8.3, ubuntu-latest): src/Rules/FunctionReturnTypeCheck.php#L140
Escaped Mutant for Mutator "PHPStan\Infection\TrinaryLogicMutator": @@ @@ $map = TemplateTypeMap::createEmpty(); foreach ($function->getParameters() as $parameter) { $parameterType = $parameter->getType(); - if (!$parameterType->isClassString()->yes()) { + if ($parameterType->isClassString()->no()) { continue; }
Integration tests (windows-latest)
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Tests PHPUnit 12.x (8.5, windows-latest)
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Tests PHPUnit 11.x (8.2, windows-latest)
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Tests with old PHPUnit (7.4, windows-latest)
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Tests PHPUnit 12.x (8.4, windows-latest)
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Tests PHPUnit 12.x (8.3, windows-latest)
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Tests with old PHPUnit (8.1, windows-latest)
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Tests with old PHPUnit (8.0, windows-latest)
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