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Segmentation fault in IJulia when loading PyCall #1108
Description
- julia version 1.13.2
- PyCall version 1.96.4
- IJulia version 1.34.4
- Python version 3.12.3
- Ubuntu 24.04
This issue only happens in IJulia/Jupyter, not in the julia-terminal.
Minimal reproducer:
[1] using PyCall --> segmentation fault
[1] using PyCall; GC.gc() --> no segmentation fault
Stack trace
in expression starting at none:1
unknown function (ip: 0x78d606b873da) at /usr/lib/x86_64-linux-gnu/libpython3.12.so.1.0
unknown function (ip: 0x78d606b87d5b) at /usr/lib/x86_64-linux-gnu/libpython3.12.so.1.0
pydecref_ at /home/user/.julia/packages/PyCall/1gn3u/src/PyCall.jl:118 [inlined]
pydecref at /home/user/.julia/packages/PyCall/1gn3u/src/PyCall.jl:123
jfptr_pydecref_7752 at /home/user/.julia/compiled/v1.13/PyCall/GkzkC_OwfuA.so (unknown line)
run_finalizer at /cache/build/builder-amdci4-4/julialang/julia-ci/src/gc-common.c:180
jl_gc_run_finalizers_in_list at /cache/build/builder-amdci4-4/julialang/julia-ci/src/gc-common.c:270
run_finalizers at /cache/build/builder-amdci4-4/julialang/julia-ci/src/gc-common.c:316
jl_mutex_unlock at /cache/build/builder-amdci4-4/julialang/julia-ci/src/julia_locks.h:90 [inlined]
jl_type_infer at /cache/build/builder-amdci4-4/julialang/julia-ci/src/gf.c:502
jl_compile_method_internal at /cache/build/builder-amdci4-4/julialang/julia-ci/src/gf.c:3715
ijl_compile_method_instance at /cache/build/builder-amdci4-4/julialang/julia-ci/src/gf.c:4086
ijl_compile_hint at /cache/build/builder-amdci4-4/julialang/julia-ci/src/gf.c:4110
Activity
yuyichao commentedon Oct 16, 2026
Yeah most likely #1096. Hopefully will be fixed soon. Ref #1097
yuyichao commentedon Oct 16, 2026
There are enough duplicated issues open I'll just close this for now. Feel free to try/comment on the PR. The plan is to fix CI and merge the fix next week and hopefully tag a release soon after.