go-spew tests fail with "panic: (reflect.Value).Interface: unexported"?

[dkegel-fastly]

Someone wanted to try yenc, so I tried building it. Its tests plotz[1] on reflect.NewAt. The call to NewAt comes via an import of an old version of github.com/davecgh/go-spew/spew.

The current version of spew doesn't use NewAt, but its tests still fail like this:

$ tinygo test
# github.com/davecgh/go-spew/spew
bypass.go:72:47: reflect.TypeOf((reflect.Value literal)).FieldByName undefined (type reflect.Type has no field or method FieldByName)
bypass.go:106:47: reflect.TypeOf((reflect.Value literal)).FieldByName undefined (type reflect.Type has no field or method FieldByName)

Using -tags safe gets further:

$ tinygo test -tags safe
panic: (reflect.Value).Interface: unexported

[1] https://www.dictionary.com/e/word-of-the-day/plotz-2020-12-15/

[dkegel-fastly]

The spew import comes in via testify.

[aykevl]

I think this was fixed with https://github.com/tinygo-org/tinygo/pull/3111, can you check whether this bug is still present?

[dgryski]

~/go/src/github.com/davecgh/go-spew/spew $ go mod init
go: creating new go.mod: module github.com/davecgh/go-spew/spew
go: to add module requirements and sums:
    go mod tidy
~/go/src/github.com/davecgh/go-spew/spew $ tinygo test
panic: unimplemented: (reflect.Type).FieldByName()
FAIL    github.com/davecgh/go-spew/spew 0.556s
~/go/src/github.com/davecgh/go-spew/spew $ tinygo test -tags=safe
panic: unimplemented: (reflect.Value).UnsafePointer()
FAIL    github.com/davecgh/go-spew/spew 0.474s

[dgryski]

spew now works when built with -tags=safe.

[deadprogram]

This is part of the v0.28 release so now closing this issue. Thanks!