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From: "guojiufu at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug go/100537] Bootstrap-O3 and bootstrap-debug fail on 32-bit ARM
 after gcc-12-657-ga076632e274a
Date: Thu, 13 May 2021 02:19:09 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D100537

--- Comment #13 from Jiu Fu Guo <guojiufu at gcc dot gnu.org> ---
(In reply to Ian Lance Taylor from comment #12)
> A change to go-gcc.cc should not change any of the error messages emitted=
 by
> the Go frontend.  It should not change the way that issue4458.go is handl=
ed.
> Those errors messages are emitted long before any of the code in go-gcc.cc
> is called.  I'm not sure what is happening.

It is interesting,  I rerun for trunk (without the patch), the message is
"error: type has no method 'foo'"
With the patch, the message is "error: method 'foo' is ambiguous"

At expressions.cc:14655
          if (!is_ambiguous)
            go_error_at(location, "type has no method %<%s%>",
                        Gogo::message_name(name).c_str());
          else
            go_error_at(location, "method %<%s%> is ambiguous",
                        Gogo::message_name(name).c_str());

is_ambiguous:
  if (nt !=3D NULL)
    method =3D nt->method_function(name, &is_ambiguous);
  else if (st !=3D NULL)
    method =3D st->method_function(name, &is_ambiguous);=