[Bug c++/88413] New: g++ mangles names involving unresolved names in function argument template parameters differently from the ABI standard.

[brennan at umanwizard dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88413

            Bug ID: 88413
           Summary: g++ mangles names involving unresolved names in
                    function argument template parameters differently from
                    the ABI standard.
           Product: gcc
           Version: 8.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: brennan at umanwizard dot com
  Target Milestone: ---

Created attachment 45189
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45189&action=edit
test case

Please see the attached test case.

how different compilers mangle g<int>:
clang: _Z1gIiEvP2S1IXsr2S2IT_EE3valEE
g++  : _Z1gIiEvP2S1IXsr2S2IT_E3valEE

Notice one less "E" from g++.

I believe g++ is wrong here, if I am interpreting
https://itanium-cxx-abi.github.io/cxx-abi/abi.html#mangle.unresolved-name
correctly.

It seems g++ doesn't emit the "E" in <unresolved-name> ::= [gs] sr
<unresolved-qualifier-level>+ E <base-unresolved-name>