What version of Go are you using (go version)?

$ go version
go version devel go1.17-756e2b1529 Fri Apr 9 19:11:12 2021 +0000 darwin/amd64
% go list -m golang.org/x/tools golang.org/x/tools/gopls
golang.org/x/tools v0.1.1-0.20210422170518-f946a157eefe
golang.org/x/tools/gopls v0.0.0-20210422170518-f946a157eefe

Does this issue reproduce with the latest release?

Yes

What did you do?

Called textDocument/semanticTokens/full with the following main.go:

package main

type Foo struct {
    A int `json:"xyz"`
}

// Foobar
func main() {
    /* comment
       with
       multiple
       lines
    */
}

(The client do report client capability support for comment token type)

What did you expect to see?

Token type comment used for all comments.

What did you see instead?

Only struct tags marked as comments.

[Trace - 21:58:20.124 PM] Sending request 'textDocument/semanticTokens/full - (2)'.
Params: {"textDocument":{"uri":"file:///private/var/folders/j4/l2j99h6d5qd6knjlllql0bb80000gn/T/tmp.Z3OfVXaR/main.go"}}


[Trace - 21:58:20.126 PM] Received response 'textDocument/semanticTokens/full - (2)' in 2ms.
Result: {"resultId":"2021-04-29 21:58:20.126462 +0200 CEST m=+7285.539207045","data":[0,0,7,15,0,0,8,4,0,0,2,0,4,15,0,0,5,3,1,2,0,4,6,15,0,1,1,1,8,2,0,2,3,1,512,0,4,12,17,0,4,0,4,15,0,0,5,4,12,2]}