[Bug c++/28952] New: Incorrect overload detected for function returning std::string ([abi:cxx11])
bugmenot at mailinator dot com
sourceware-bugzilla@sourceware.org
Thu Mar 10 05:16:02 GMT 2022
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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