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go/types, types2: error messages don't distinguish between different types with the same names #48295

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griesemer opened this issue Sep 9, 2021 · 0 comments
Open

go/types, types2: error messages don't distinguish between different types with the same names #48295

griesemer opened this issue Sep 9, 2021 · 0 comments
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NeedsInvestigation Someone must examine and confirm this is a valid issue and not a duplicate of an existing one.
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package p

type T int

func _() {
	type GlobalT = T
	type T int
	var _ T = GlobalT(0)
}

produces:

x.go:8:12: incompatible type: cannot use GlobalT(0) (constant 0 of type T) as T value

The error message reports the same type (T) for the variable and the constant, which is confusing.

Maybe we can detect cases like these and provide additional information, such as where the types are declared.

Not urgent as this is a rare scenario.
@griesemer griesemer added the NeedsInvestigation Someone must examine and confirm this is a valid issue and not a duplicate of an existing one. label Sep 9, 2021
@griesemer griesemer added this to the Backlog milestone Sep 9, 2021
@griesemer griesemer self-assigned this Sep 9, 2021
@griesemer griesemer mentioned this issue Sep 9, 2021
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