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

Sam James
2026-02-23T13:30:32Z

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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]
```

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