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Fix IntersectionType::isIterableOnce #4106

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Fix IntersectionType::isIterableOnce #4106

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@VincentLanglet VincentLanglet commented Jul 17, 2025 •
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Closes phpstan/phpstan#13248

I feel like non-iterable should be excluded since as soon as one subtype is iterable the whole intersection is iterable.

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incorrect Empty array passed to foreach. error when iterating over an intersection of X&Traversable
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