Dan Scales a991d9dc27 cmd/compile: add missing shape check in (*Tsubster).tinter ... Add a missing shape check in (*Tsubster).tinter when substituting on a generic type which is an empty interface, analogous to same check in (*Tsubster).tstruct. Empty structs/interfaces that have rparams (i.e. are a generic type or a shape type) need to get a new type of their rparams - they will be different even though they don't have any fields/methods. Without this shape check, we were not correctly completing the Token[int] type during substitution in the example in the issue. This issue only happens for a generic type which is an empty interface (i.e. doesn't actually use the type param, hence quite unusual). Added the test case already created by Keith. Fixes #50841 Change-Id: Ia985b9f52c0e87ed0647b46373e44c51cb748ba4 Reviewed-on: https://go-review.googlesource.com/c/go/+/381175 Trust: Dan Scales <danscales@google.com> Run-TryBot: Dan Scales <danscales@google.com> TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Keith Randall <khr@golang.org>		2022-01-27 05:30:27 +00:00
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a.go	cmd/compile: add missing shape check in (*Tsubster).tinter	2022-01-27 05:30:27 +00:00
b.go	cmd/compile: add missing shape check in (*Tsubster).tinter	2022-01-27 05:30:27 +00:00