Need help with failing dmd testsuite on NixOS

[Thomas Mader]

Hello,

running the dmd testsuite for the package build on NixOS fails 
with some gdb tests.
It looks like it is a problem with gdb used in the system. The 
breakpoint setting doesn't seem to work.
I thought that maybe somebody has some experience with this and 
knows what's going on.

Here is the failing output of one of the testcases:

  ... runnable/gdb14225.d            -g -fPIC ()
Test runnable/gdb14225.d failed.  The logged output:
/build/dmd/generated/linux/release/64/dmd -conf= -m64 -Irunnable 
-g -fPIC  -odtest_results/runnable 
-oftest_results/runnable/gdb14225_0  runnable/gdb14225.d
gdb test_results/runnable/gdb14225_0 --batch -x 
test_results/runnable/gdb14225_0.gdb
Breakpoint 1 at 0x4011b4: file ../../druntime/import/object.d, 
line 2944.
[Thread debugging using libthread_db enabled]
Using host libthread_db library 
"/nix/store/hp8wcylqr14hrrpqap4wdrwzq092wfln-glibc-2.32-37/lib/libthread_db.so.1".

Breakpoint 1, object.dup!(char).dup(const(char)[]) (a=...) at 
../../druntime/import/object.d:2944
2944            return _trustedDup!(const(T), T)(a);
RESULT=test_results/runnable/gdb14225_0.gdb:5: Error in sourced 
command file:
No symbol "lok" in current context.


==============================
Test runnable/gdb14225.d failed: expected rc == 0, exited with rc 
== 1