[Bug c++/28952] New: Incorrect overload detected for function returning std::string ([abi:cxx11])

[Bug c++/28952] New: Incorrect overload detected for function returning std::string ([abi:cxx11])

[bugmenot at mailinator dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=28952

            Bug ID: 28952
           Summary: Incorrect overload detected for function returning
                    std::string ([abi:cxx11])
           Product: gdb
           Version: 10.1
            Status: UNCONFIRMED
          Severity: critical
          Priority: P2
         Component: c++
          Assignee: unassigned at sourceware dot org
          Reporter: bugmenot at mailinator dot com
  Target Milestone: ---

Similar bug: https://sourceware.org/bugzilla/show_bug.cgi?id=19436

To reproduce:

=== file: a.cpp
```
#include<string>

struct A {};
struct B {};

std::string function(A){ return "A"; }
std::string function(B){ return "B"; }

int main(){
        A a {};
        B b {};
        __builtin_trap();
}
```

Compile with `g++ -g a.cpp`, then execute `run` then `function(a)` in gdb.

Actual result: "B"
Expected result: "A"

With `-D_GLIBCXX_USE_CXX11_ABI=0` the bug does not happen.

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[Bug c++/28952] Incorrect overload detected for function returning std::string ([abi:cxx11])

[bugmenot at mailinator dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=28952

John Doe <bugmenot at mailinator dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|critical                    |normal

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[Bug c++/28952] Incorrect overload detected for function returning std::string ([abi:cxx11])

[ssbssa at sourceware dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=28952

Hannes Domani <ssbssa at sourceware dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |ssbssa at sourceware dot org

--- Comment #1 from Hannes Domani <ssbssa at sourceware dot org> ---
find_overload_match() fails because cp_demangled_name_to_comp() inside
cp_func_name() returns NULL when called with "function[abi:cxx11](B)".

So it looks like cp-name-parser.y can't hangle these abi tags.

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