[Bug c++/17632] New: No locals for lambdas in initialiser lists

[Bug c++/17632] New: No locals for lambdas in initialiser lists

[khaurbeille+sourceware at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=17632

            Bug ID: 17632
           Summary: No locals for lambdas in initialiser lists
           Product: gdb
           Version: 7.6
            Status: NEW
          Severity: minor
          Priority: P2
         Component: c++
          Assignee: unassigned at sourceware dot org
          Reporter: khaurbeille+sourceware at gmail dot com

Created attachment 7961
  --> https://sourceware.org/bugzilla/attachment.cgi?id=7961&action=edit
Example code

GDB is not able to display local variables for lambda functions that are used
in an initialiser list. Lambda functions in regular code work fine.

Steps to reproduce:
Compile attached file (GCC 4.8.3) with c++11 and debug info enabled
Run gdb on the executable
Run the following commands:
break 10
break 22
run
info locals
c
info locals

Actual results:
1st info locals:
std::__ioinit = {static _S_refcount = <optimized out>, static
_S_synced_with_stdio = <optimized out>}

2nd info locals:
b = 4
c = @0x7fffffffddac: 4

Expected results:
Similar outputs for the 2 info locals

Stepping works as expected inside both lambdas.

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[Bug c++/17632] No locals for lambdas in initialiser lists

[ssbssa at sourceware dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=17632

Hannes Domani <ssbssa at sourceware dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |MOVED
             Status|NEW                         |RESOLVED
                 CC|                            |ssbssa at sourceware dot org

--- Comment #1 from Hannes Domani <ssbssa at sourceware dot org> ---
This was a debug info bug on gcc side that was fixed a while ago.

If you compile this with a gcc >= 6.1, then the output looks like this:
```
Reading symbols from gdb-17632.exe...done.
(gdb) b 10
Breakpoint 1 at 0x4a0778: file gdb-17632.cpp, line 10.
(gdb) b 22
Breakpoint 2 at 0x401668: file gdb-17632.cpp, line 22.
(gdb) r
Starting program: C:\src\tests\gdb-17632.exe
[New Thread 6852.0x1bd8]

Breakpoint 1, Breaker::Breaker(int)::{lambda()#1}::operator()() const
(__closure=0x22fde0) at gdb-17632.cpp:10
10          b++;
(gdb) info locals
b = 2
c = @0x22fe08: 2
(gdb) c
Continuing.
3

Breakpoint 2, <lambda()>::operator()(void) const (__closure=0x22fe40) at
gdb-17632.cpp:22
22            b++;
(gdb) info locals
b = 4
c = @0x22fe2c: 4
```

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