Can't get the spectrum integrated with OpenMP

[epassaro]

SO: Ubuntu 18.04
Linux Kernel: 5.3.0-26-generic
Compilers: using the latest conda-forge compilers
TARDIS version: 3.0.dev3378

Steps:

1. Install via TARDIS via setup.py with the --with-openmp flag.
2. Run simulation with default tardis_example.yml and default atomic data, with nthreads greater than 1 and call simulation.runner.spectrum_integrated lazy attribute.

Output:

[tardis.simulation.base][INFO   ]  Simulation finished in 20 iterations and took 179.66 s (base.py:308)
Doing the formal integral
Running with OpenMP - 4 threads
        [100%] Bins(finished/total): 10000/10000
double free or corruption (!prev)
Makefile:4: recipe for target 'spectra' failed
make: *** [spectra] Aborted (core dumped)

[epassaro]

Maybe this is related to the changes introduced in #995

[epassaro]

I can confirm this bug was introduced in #995 @wkerzendorf

[cbadjatya]

@epassaro I tried recreating the issue with these steps :
installed tardis with --with-openmp
changed tardis_example.yml file with nthreads=3 and method : integrated in spectrum block

However upon running the quickstart notebook, the simulation simply ended with

[tardis.simulation.base][INFO   ]  Simulation finished in 20 iterations and took 36.05 s (base.py:308)

Am I executing all necessary steps?

[Phantsure]

I tried reversing the changes in #995, still same error. My machine specs are similar.

[kaushik94]

I think #995 should be reverted anyways @epassaro @wkerzendorf .

[epassaro]

Fixed by #1159.