[llvm-bugs] [Bug 48652] New: Assertion failure at kmp_csupport.cpp(522)

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=48652

            Bug ID: 48652
           Summary: Assertion failure at kmp_csupport.cpp(522)
           Product: OpenMP
           Version: unspecified
          Hardware: Macintosh
                OS: MacOS X
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Runtime Library
          Assignee: unassignedbugs at nondot.org
          Reporter: jelle.assink at gmail.com
                CC: llvm-bugs at lists.llvm.org

Hello all,

First of all, best wishes for the new year.

I recently upgraded to a new laptop that is running macOS 11.1 (Big Sur).
Previously I was on Catalina (10.15.7). As part of the upgrade, I transferred
my existing Conda environments to the new Mac.

In one of the environments, I have a Python package that interfaces with a
Fortran library, which has been parallelised using OpenMP. The library is
compiled using the f2py package with the following arguments:

            "--compiler=unix --fcompiler=gnu95 -L. -lgomp "
            "--f90flags='-fopenmp -funroll-loops -std=f2003' "
            "--opt=-Ofast "

Running the compiled code leads to a kernel crash:

OMP: Error #13: Assertion failure at kmp_csupport.cpp(522).
OMP: Hint Please submit a bug report with this message, compile and run
commands used, and machine configuration info including native compiler and
operating system versions. Faster response will be obtained by including all
program sources. For information on submitting this issue, please see
https://bugs.llvm.org/.

I am not sure what to do. I have made sure that the versions of the packages
are exactly the same as on my Catalina machine, most notably numpy and the
llvm-openmp library.

Please let me know which additional details to provide.

Thank you for your help,
Jelle Assink

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