ldc-developers
Internal error: pc read in psymtab, but not in symtab when debugging with GDB
We have a fairly large project with many dependencies, including Vibe.d.
Recently we started to distribute binaries for Ubuntu 20.04 x86_64, built on the Github runners.
That latest LDC (v1.28.1) is downloaded from dlang-community/setup-dlang, which AFAIK uses the releases from this repository.
Our latest release had a silly null pointer dereference which caused a SEGV. We got the core file from the servers (Ubuntu 20.04) and entered it in gdb:
# gdb --version
GNU gdb (Ubuntu 9.2-0ubuntu1~20.04.1) 9.2
Copyright (C) 2020 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
This is what the bt output looks like:
The build log for the binary is here.
Something that might be relevant, we use --export-dynamic as it allows us to have better backtrace (normally).
I have also attached the core dump: It's 4.3G uncompressed, but the zip contains an lz4 archive (because Github wants zip and systemd gave me lz4).
Have you tried it without --export-dynamic? IIRC, they're not needed for gdb backtraces, just for the druntime one.
