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griesemer opened this issue Jun 30, 2020 · 2 comments
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cmd/go2go: missing type cycle error #39938

griesemer opened this issue Jun 30, 2020 · 2 comments
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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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@griesemer
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griesemer commented Jun 30, 2020 •
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type base(type T) struct{
        pointer T
}

type foo struct { // <<< should get a cycle error here
        _ (base(foo))
}

type foo2 struct { // <<< correctly reporting illegal cycle in declaration of foo2
	_ struct{
       		pointer foo2
	}
}

Found as part of #39901.
@griesemer griesemer added the NeedsInvestigation Someone must examine and confirm this is a valid issue and not a duplicate of an existing one. label Jun 30, 2020
@griesemer griesemer added this to the Unreleased milestone Jun 30, 2020
@griesemer griesemer self-assigned this Jun 30, 2020
@griesemer griesemer mentioned this issue Jun 30, 2020
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@griesemer griesemer changed the title cmd/go2go: unexpected type cycle error cmd/go2go: missing type cycle error Jun 30, 2020
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Change https://golang.org/cl/240519 mentions this issue: [dev.go2go] go/types: report "inifinite expansion" cycles across instantiated types

gopherbot pushed a commit that referenced this issue Jun 30, 2020
@griesemer
[dev.go2go] go/types: report "inifinite expansion" cycles across inst…
1e27b76 
…antiated types

Fixes #39938.

Change-Id: I482b211189cefdc098df5acb4f858f6f1635ce60
Reviewed-on: https://go-review.googlesource.com/c/go/+/240519
Reviewed-by: Robert Griesemer <[email protected]>
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Fixed in dev.go2go.

@golang golang locked and limited conversation to collaborators Jun 30, 2021
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