Bug#1060318: Info received (silx: autopkgtest failure with Python 3.12)

[Andreas Beckmann]

On Sun, 10 Mar 2024 15:21:34 +0100 (CET) PICCA Frederic-Emmanuel <frederic-emmanuel.picca at synchrotron-soleil.fr> wrote:
> Here a small script which trigger the error
Thanks. Works for me in a minimal sid chroot:

# apt-get install python3-silx
# python3 test.py
python3: ./lib/llvmopencl/Kernel.cc:129: pocl::ParallelRegion* pocl::Kernel::createParallelRegionBefore(llvm::BasicBlock*): Assertion `region_entry_barrier != NULL' failed.
Aborted

At least the assertion has been there from the beginning (0.9, first
Debian packaged version was 0.10-1).

With

export POCL_CACHE_DIR=$(mktemp -d -p $(pwd))
export POCL_LEAVE_KERNEL_COMPILER_TEMP_FILES=1

I could extract the failing .cl file
After installing libpocl-dev I could reproduce the failure on sid

sid# poclcc 1060318.cl
poclcc: ./lib/llvmopencl/Kernel.cc:129: pocl::ParallelRegion* pocl::Kernel::createParallelRegionBefore(llvm::BasicBlock*): Assertion `region_entry_barrier != NULL' failed.
Aborted

sid# POCL_WORK_GROUP_METHOD=cbs poclcc 1060318.cl
[SubCFG] Form SubCFGs in bsort_all
[SubCFG] Form SubCFGs in bsort_horizontal
[SubCFG] Form SubCFGs in bsort_vertical
[SubCFG] Form SubCFGs in bsort_book
[SubCFG] Form SubCFGs in bsort_file
[SubCFG] Form SubCFGs in medfilt2d
sid # ls -la 1060318.cl*
-rw-r--r-- 1 root root  48015 Mar 12 11:00 1060318.cl
-rw-r--r-- 1 root root 404138 Mar 12 11:18 1060318.cl.pocl

but not on bookworm:

bookworm# poclcc 1060318.cl
bookworm# ls -la 1060318.cl*
-rw-r--r-- 1 1001 1001  48015 Mar 12 11:08 1060318.cl
-rw-r--r-- 1 root root 971490 Mar 12 11:13 1060318.cl.pocl

Andreas
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