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go/types, types2: stack overflow in hasVarSize for invalid generic type #52915

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findleyr opened this issue May 15, 2022 · 1 comment
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go/types, types2: stack overflow in hasVarSize for invalid generic type #52915

findleyr opened this issue May 15, 2022 · 1 comment
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FrozenDueToAge NeedsInvestigation Someone must examine and confirm this is a valid issue and not a duplicate of an existing one.
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Go1.19

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@findleyr
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Similar to #48819, the following invalid generic type declaration causes an infinite recursion in hasVarSize, when computing unsafe.Sizeof.

type T[P any] struct {
	T[P]
}

func _() {
	_ = unsafe.Sizeof(T[int]{})
}

https://go.dev/play/p/T5qCKxz69bk

CC @griesemer
@findleyr findleyr added the NeedsInvestigation Someone must examine and confirm this is a valid issue and not a duplicate of an existing one. label May 15, 2022
@findleyr findleyr added this to the Go1.19 milestone May 15, 2022
@griesemer griesemer self-assigned this May 15, 2022
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Change https://go.dev/cl/406849 mentions this issue: types2: don't panic with invalid recursive generic type

@golang golang locked and limited conversation to collaborators Jun 22, 2023
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