http://d.puremagic.com/issues/show_bug.cgi?id=1079





------- Comment #9 from stephan@kochen.nl  2007-12-28 06:16 -------
I looked at the problem again this morning, and it looks like it's triggered by delegate parameters. This is the smallest testcase I could come up with:

void problem(void delegate(Object) dg) { dg(null); }
void main() {
    problem(delegate void(Object o) {
        auto s = o.toString();
    });
}

There's an intentional crasher again, so simply compiling and running this in GDB should trigger the bug immediately. I tested this with DMD 1.024, Tango 0.99.4 and the GDB 6.7.1 that is in Ubuntu Hardy right now.


-- 

http://d.puremagic.com/issues/show_bug.cgi?id=1079





------- Comment #10 from someanon@yahoo.com  2008-02-20 22:44 -------
Also have this problem with v2.011 on Linux.

when setting breakpoint:

without -gc:

Die: DW_TAG_<unknown> (abbrev = 21, offset = 3690)
        has children: FALSE
        attributes:
                DW_AT_byte_size (DW_FORM_data1) constant: 8
                DW_AT_containing_type (DW_FORM_ref4) constant ref: 1553
(adjusted)
                DW_AT_type (DW_FORM_ref4) constant ref: 3674 (adjusted)
Dwarf Error: Cannot find type of die


with -gc:

Dwarf Error: Cannot find DIE at 0x1369b7 referenced from DIE at 0x19b [in module


-- 

http://d.puremagic.com/issues/show_bug.cgi?id=1079





------- Comment #11 from someanon@yahoo.com  2008-02-20 22:46 -------
BTW, using http://ftp.gnu.org/gnu/gdb/gdb-6.5.tar.bz2
with http://www.dsource.org/projects/gdb-patches
d-gdb6.5.patch


-- 

http://d.puremagic.com/issues/show_bug.cgi?id=1079


Leandro Lucarella <llucax@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|REOPENED                    |RESOLVED
                 CC|                            |llucax@gmail.com
         Resolution|                            |FIXED
            Summary|gdb on linux: Dwarf Error:  |gdb: Dwarf Error: Cannot
                   |Cannot find DIE at 0xb705   |find DIE at 0xb705
                   |referenced from DIE at      |referenced from DIE at
                   |0x250                       |0x250


--- Comment #12 from Leandro Lucarella <llucax@gmail.com> 2009-10-12 14:11:44 PDT ---
This seems to be working in DMD 1.049 and 2.034.

I'm trying to organize GDB-related bugs, so I will close this one. Please let me know if I shouldn't be closing bugs and feel free to reopen it if still having this problem.

-- 
Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email
------- You are receiving this mail because: -------

http://d.puremagic.com/issues/show_bug.cgi?id=1079


Leandro Lucarella <llucax@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |REOPENED
            Version|1.009                       |2.034
         Resolution|FIXED                       |


--- Comment #13 from Leandro Lucarella <llucax@gmail.com> 2009-10-12 16:21:06 PDT ---
Seems to be still happening with DMD 2.034 (DMD 1.049 works fine). See bug 3368
for details.

-- 
Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email
------- You are receiving this mail because: -------

http://d.puremagic.com/issues/show_bug.cgi?id=1079


Leandro Lucarella <llucax@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |echochamber@gmail.com


--- Comment #14 from Leandro Lucarella <llucax@gmail.com> 2009-10-12 16:21:55 PDT ---
*** Issue 3368 has been marked as a duplicate of this issue. ***

-- 
Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email
------- You are receiving this mail because: -------

http://d.puremagic.com/issues/show_bug.cgi?id=1079



--- Comment #15 from Bernard Helyer <blood.of.life@gmail.com> 2010-01-20 20:53:25 PST ---
This seems to have something to do with arrays (or manifests itself when they
are present):

  [test]$ cat nolist.d
  void main()
  {
      int i = 0;

      i++;
      assert(i == 1);
      i++;
      assert(i == 2);
      i++;
      assert(i == 3);
  }

That debugs fine, while

[test]$ cat list.d
void main()
{
    int[] i = new int[1];

    i[0]++;
    assert(i[0] == 1);
    i[0]++;
    assert(i[0] == 2);
    i[0]++;
    assert(i[0] == 3);
}


debugging these:

[test]$ dgdb -q nolist
(gdb) break _Dmain
Breakpoint 1 at 0x80490aa: file nolist.d, line 1.
(gdb) run
Starting program: /home/bernard/src/dmd2/src/test/nolist
[Thread debugging using libthread_db enabled]
[New Thread 0xb75c46d0 (LWP 27012)]
[Switching to Thread 0xb75c46d0 (LWP 27012)]

Breakpoint 1, D main () at nolist.d:3
3        int i = 0;
Current language:  auto; currently d
(gdb) quit
The program is running.  Exit anyway? (y or n) y
[test]$ dgdb -q list
(gdb) break _Dmain
Die: DW_TAG_<unknown> (abbrev = 4, offset = 460)
    has children: FALSE
    attributes:
        DW_AT_byte_size (DW_FORM_data1) constant: 8
        DW_AT_type (DW_FORM_ref4) constant ref: 453 (adjusted)
Dwarf Error: Cannot find type of die [in module
/home/bernard/src/dmd2/src/test/list]
(gdb) quit
[test]$ gdb -q list
(gdb) break _Dmain
Die: DW_TAG_<unknown> (abbrev = 4, offset = 460)
    has children: FALSE
    attributes:
        DW_AT_byte_size (DW_FORM_data1) constant: 8
        DW_AT_type (DW_FORM_ref4) constant ref: 453 (adjusted)
Dwarf Error: Cannot find type of die [in module
/home/bernard/src/dmd2/src/test/list]




Where `dgdb` is a patch GDB 6.8 and `gdb` is the normal GDB that ships with Jaunty. The `nolist` binary is debuggable with the stock GDB, too.

-- 
Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email
------- You are receiving this mail because: -------

http://d.puremagic.com/issues/show_bug.cgi?id=1079



--- Comment #16 from Bernard Helyer <blood.of.life@gmail.com> 2010-01-20 20:55:48 PST ---
Oh! The above were simply compiled like so:

dmd -g list.d
dmd -g nolist.d

-- 
Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email
------- You are receiving this mail because: -------

http://d.puremagic.com/issues/show_bug.cgi?id=1079



--- Comment #17 from Bernard Helyer <blood.of.life@gmail.com> 2010-01-20 21:17:42 PST ---
Compiling with `-gc` allows gdb to debug it (but not interact with AA or DAs, of course). This is with a patched gdb, though. Perhaps the bug lies in the patches? I have definitely had failures on larger projects with `-gc`, though, so I suspect dmd still has problems with its DWARF output regardless.

-- 
Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email
------- You are receiving this mail because: -------

http://d.puremagic.com/issues/show_bug.cgi?id=1079


Robert Clipsham <robert@octarineparrot.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |robert@octarineparrot.com


--- Comment #18 from Robert Clipsham <robert@octarineparrot.com> 2010-03-19 16:34:02 PDT ---
http://d.puremagic.com/issues/show_bug.cgi?id=3987 Is related to this bug, if not a duplicate. I'd also like to note that all the DW_TAG_<unknown> errors when using -g rather than -gc are non-bugs, as that is expected until gdb supports D's extensions to DWARF. If you get them when using -gc it is a dmd issue.

-- 
Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email
------- You are receiving this mail because: -------