[Bug c++/29896] New: GDB git doesn't recognize template function name

["vimacs.hacks at gmail dot com" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=29896

            Bug ID: 29896
           Summary: GDB git doesn't recognize template function name
           Product: gdb
           Version: HEAD
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c++
          Assignee: unassigned at sourceware dot org
          Reporter: vimacs.hacks at gmail dot com
  Target Milestone: ---

First posted on https://sourceware.org/pipermail/gdb/2022-November/050431.html

GDB 12.1 works as expected in this case.

For the following C++ program built with "g++ -g -o test test.cc" (no matter
what optimization level used):


template <typename T = int>
int t0(int n)
{
     int sum = 0;
     for (int i = 0; i < n; ++i) {
         sum += i * i;
     }
     return sum;
}

int t1(int n)
{
     int sum = 0;
     for (int i = 0; i < n; ++i) {
         sum += i * i;
     }
     return sum;
}

int main()
{
     int a = t0(5);
     int b = t1(5);
     return a + b;
}

We cannot use "b t0" command, however, after I use tab completion once, GDB
recognize this:

(gdb) b t0
Function "t0" not defined.
Make breakpoint pending on future shared library load? (y or [n]) n
(gdb) #b t0<int>(int) 
(gdb) b t0
Breakpoint 1 at 0x117d: file test.cc, line 4.

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