Re: [PATCH v3 0/8] Correctly handle inline functions with dwz

Simon Marchi
2026-02-23T13:34:39Z

On 2026-02-23 08:30, Sam James wrote:
> Tom Tromey <tom@tromey.com> writes:
>
>> The new indexer does not correctly handle inline functions when 'dwz'
>> is used to compress the DWARF. This series fixes the bug, cleaning up
>> a number of other things on the way.
>>
>> I've separately regression tested each patch in this series on x86-64
>> Fedora 41. I've also regression tested the series as a whole with the
>> dwz, gdb-index, and debug-names boards.
>>
>> Even with that I messed up somehow, so v1 didn't actually fix the bug
>> in question. I must have modified the patches after testing..?
>>
>> Anyway in v2 I've moved the line recording the CU inclusion and added
>> a comment explaining the placement. I re-ran the aformentioned tests
>> and didn't touch anything.
>
> With this, I get a crash when creating an index:
> ```
> $ /usr/bin/gdb --batch -nx -iex set\ auto-load\ no -iex set\ debuginfod\
> enabled\ off -ex file\
> \'/var/tmp/portage/dev-debug/gdb-9999/image/usr/bin/gdb\' -ex save\
> gdb-index\ -dwarf-5\
> \'/var/tmp/portage/dev-debug/gdb-9999/image/usr/bin\'
> dwarf2/index-write.c:818: internal-error: build: Assertion `offset_inserted' failed.
> A problem internal to GDB has been detected,
> further debugging may prove unreliable.
> ----- Backtrace -----
> 0x561db97db67e ???
> 0x561db9fd8a04 ???
> 0x561dba59b487 ???
> 0x561db9918fe0 ???
> 0x561db991fb47 ???
> 0x561db9927e99 ???
> 0x561db99282e0 ???
> 0x561db9f12f56 ???
> 0x561db9b6612c ???
> 0x561db9b6cbfb ???
> 0x561db9644baf ???
> 0x7f8b51c03649 ???
> 0x7f8b51c03765 ???
> 0x561db96648d0 ???
> 0xffffffffffffffff ???
> ---------------------
> dwarf2/index-write.c:818: internal-error: build: Assertion `offset_inserted' failed.
> A problem internal to GDB has been detected,
> further debugging may prove unreliable.
> Quit this debugging session? (y or n) [answered Y; input not from terminal]
>
> This is a bug, please report it. For instructions, see:
> <https://bugs.gentoo.org/>.
>
> dwarf2/index-write.c:818: internal-error: build: Assertion `offset_inserted' failed.
> A problem internal to GDB has been detected,
> further debugging may prove unreliable.
> Create a core file of GDB? (y or n) [answered Y; input not from
> terminal]
> ```

Are you able to share the binary?

Simon