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a295d59d10
CL 230037 changed cmd/cgo to emit "type _Ctype_foo = bar" aliases for all C.foo types mentioned in the original Go source files. However, cmd/cgo already emits an appropriate type definition for _Ctype_void. So if a source file explicitly mentions C.void, this resulted in _Ctype_void being declared multiple times. This CL fixes the issue by suppressing the "type _Ctype_void = _Ctype_void" alias before printing it. This should be safe because _Ctype_void is the only type that's specially emitted in out.go at the moment. A somewhat better fix might be to fix how _Ctype_void is declared in the cmd/cgo "frontend", but this is a less invasive fix. Fixes #39877. Change-Id: Ief264b3847c8ef8df1478a6333647ff2cf09b63d Reviewed-on: https://go-review.googlesource.com/c/go/+/240180 Run-TryBot: Matthew Dempsky <mdempsky@google.com> Reviewed-by: Ian Lance Taylor <iant@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org>