[gollvm/gofrontend]unnamed bool convert error

[hang gao]

Hi,

I got a assert fail for gollvm when compiling test/fixedbugs/issue16870.go

the assert is in function names.cc / Gogo::type_descriptor_backend_name

It is caused by the example like this.

when there is a channel/map/... used with an empty interface like this:

func test(got, want interface{})

var ok interface{}

m:=make(map[int]int)

i, ok = m[0]

test(ok,false)

If we receive the bool value from the  i, ok = m[0] and convert it to an empty interface, the assert will be triggered

I found that the return value of functions like mapaccess2 are generated as unnamed types, which means they use make_boolean_type() rather than make_named_bool_type(),  is this reasonable? and do you know how to fix it?

Thanks！

[hang gao]

I found that when receiving the ret val from functions，the RFT_BOOL will use Type::make_boolean_type() which will generate a unnamed bool type,

I would like to change this to Type::lookup_bool_type();

I just wondering if this is ok ?

The code is in gofrontend/go/runtime.cc/runtime_function_type

[Ian Lance Taylor]

For the record, this became https://go.dev/issue/52535, q.v.

Thanks for the report.

Ian

> --
> You received this message because you are subscribed to the Google Groups "golang-nuts" group.
> To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts...@googlegroups.com.
> To view this discussion on the web visit https://groups.google.com/d/msgid/golang-nuts/8639f65f-248f-455c-99ec-3ddf8a2eeb14n%40googlegroups.com.