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JIT hang / dead loop in hypothesis test suite #154701

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JIT hang / dead loop in hypothesis test suite#154701
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interpreter-core(Objects, Python, Grammar, and Parser dirs)topic-JITtype-bugAn unexpected behavior, bug, or error

Description

@mgorny
mgorny
opened on Jul 25, 2026

Bug report

Bug description:

After enabling JIT on Python 3.15, I've noticed that the Hypothesis test suite started hanging. Unfortunately, I wasn't able to figure out a precise reproducer. However, I can reliably reproduce it with the following calls:

# this is the last version without Rust, to have extensions out of the equation
# (newer versions hang the same)
$ git clone -q -b v6.155.7 https://github.com/HypothesisWorks/hypothesis/
$ cd hypothesis/hypothesis
$ uv venv -p ~/cpython/python
Using CPython 3.16.0a0+debug interpreter at: /home/mgorny/cpython/python
Creating virtual environment at: .venv
Activate with: source .venv/bin/activate
$ uv pip install -e . pytest
Resolved 7 packages in 1.58s
      Built hypothesis @ file:///home/mgorny/hypothesis/hypothesis                                                                     
Prepared 1 package in 589ms
Installed 7 packages in 30ms
 + hypothesis==6.155.7 (from file:///home/mgorny/hypothesis/hypothesis)
 + iniconfig==2.3.0
 + packaging==26.2
 + pluggy==1.6.0
 + pygments==2.20.0
 + pytest==9.1.1
 + sortedcontainers==2.4.0
$ .venv/bin/pytest -vv tests/cover/test_lookup_py37.py::test_resolving_standard_tuple_variadic_as_generic tests/cover/test_lookup_py37.py::test_resolving_standard_list_as_generic tests/cover/test_lookup_py37.py::test_resolving_standard_dict_as_generic tests/cover/test_lookup_py37.py::test_resolving_standard_set_as_generic tests/cover/test_lookup_py37.py::test_resolving_standard_deque_as_generic tests/cover/test_lookup_py37.py::test_resolving_standard_defaultdict_as_generic
========================================================= test session starts =========================================================
platform linux -- Python 3.16.0a0, pytest-9.1.1, pluggy-1.6.0 -- /home/mgorny/hypothesis/hypothesis/.venv/bin/python3
cachedir: .pytest_cache
hypothesis profile 'default'
rootdir: /home/mgorny/hypothesis
configfile: pyproject.toml
plugins: hypothesis-6.155.7
collected 6 items                                                                                                                     

tests/cover/test_lookup_py37.py::test_resolving_standard_tuple_variadic_as_generic PASSED                                       [ 16%]
tests/cover/test_lookup_py37.py::test_resolving_standard_list_as_generic PASSED                                                 [ 33%]
tests/cover/test_lookup_py37.py::test_resolving_standard_dict_as_generic PASSED                                                 [ 50%]
tests/cover/test_lookup_py37.py::test_resolving_standard_set_as_generic PASSED                                                  [ 66%]
tests/cover/test_lookup_py37.py::test_resolving_standard_deque_as_generic PASSED                                                [ 83%]
tests/cover/test_lookup_py37.py::test_resolving_standard_defaultdict_as_generic

Now, some notes:

  1. The CPU is 100% busy, and Python doesn't respond to Ctrl-C. I have to kill it explicitly now.
  2. I'm not 100% sure if it's completely deadlooped or just takes forever to complete; I haven't waited more than 10 minutes (with optimized build of Python), I think.
  3. I've reproduced this with optimized 3.15.0b4, and --with-pydebug --enable-experimental-jit builds of 3.15 (1667a6c) and main (b86a41c).
  4. The problem seems to require running at least the bunch of other tests. If you can't reproduce with this set, you can try whole tests/cover/test_lookup_py37.py or perhaps even larger part of the test suite.

gdb doesn't seem to be of much help here.

gdb backtrace 
#0  0x000055dfc010354b in _PyFrame_GetCode (f=f@entry=0x7fdb5a628b98) at ./Include/internal/pycore_interpframe.h:21
#1  0x000055dfc0108586 in _PyFrame_Stackbase (f=0x7fdb5a628b98) at ./Include/internal/pycore_interpframe.h:102
#2  _Py_assert_within_stack_bounds (frame=0x7fdb5a628b98, stack_pointer=0x7fdb5a628c08, 
    filename=filename@entry=0x55dfc035222c "executor_cases.c.h", lineno=176) at Python/ceval.c:989
#3  0x000055dfc010861b in _Py_jit_assert_within_stack_bounds (frame=<optimized out>, stack_pointer=<optimized out>, 
    lineno=<optimized out>) at Python/ceval.c:1007
#4  0x00007fdb5a4c7177 in py::jit:executor ()
#5  0x000055dfc011a0b2 in _PyEval_EvalFrameDefault (tstate=<optimized out>, 
    frame=0x55dfc0108605 <_Py_jit_assert_within_stack_bounds>, throwflag=0) at Python/generated_cases.c.h:6188
#6  0x000055dfbffd31f3 in _PyEval_EvalFrame (tstate=tstate@entry=0x55dfc06e67d0 <_PyRuntime+264816>, 
    frame=frame@entry=0x7fdb5a628b98, throwflag=throwflag@entry=0) at ./Include/internal/pycore_ceval.h:122
#7  0x000055dfbffd329a in gen_send_ex2 (gen=0x7fdb5a628b50, arg=0x0, presult=0x7ffe42ffae50, exc=exc@entry=0)
    at Objects/genobject.c:281
#8  0x000055dfbffd3b57 in gen_send_ex (gen=<optimized out>, arg=arg@entry=0x0, presult=presult@entry=0x7ffe42ffae50)
    at Objects/genobject.c:374
#9  0x000055dfbffd5595 in gen_iternext (self=<optimized out>) at Objects/genobject.c:767
#10 0x000055dfc00fd438 in builtin_all (module=<optimized out>, iterable=iterable@entry=0x7fdb5a628b50) at Python/bltinmodule.c:399
#11 0x000055dfc0112752 in _PyEval_EvalFrameDefault (tstate=<optimized out>, frame=0x7fdb5e2494f0, throwflag=0)
    at Python/generated_cases.c.h:2712
#12 0x000055dfc012a9fa in _PyEval_EvalFrame (tstate=tstate@entry=0x55dfc06e67d0 <_PyRuntime+264816>, 
    frame=frame@entry=0x7fdb5e2482a0, throwflag=throwflag@entry=0) at ./Include/internal/pycore_ceval.h:122
#13 0x000055dfc012abf5 in _PyEval_Vector (tstate=0x55dfc06e67d0 <_PyRuntime+264816>, func=0x7fdb5d158350, locals=locals@entry=0x0, 
    args=0x7fdb5ae41488, argcount=<optimized out>, kwnames=0x7fdb49c8ddb0) at Python/ceval.c:2172
#14 0x000055dfbffb51fd in _PyFunction_Vectorcall (func=<optimized out>, stack=<optimized out>, nargsf=<optimized out>, 
    kwnames=<optimized out>) at Objects/call.c:413
#15 0x000055dfbffb6f0a in _PyObject_VectorcallDictTstate (tstate=tstate@entry=0x55dfc06e67d0 <_PyRuntime+264816>, 
    callable=callable@entry=0x7fdb5d158350, args=args@entry=0x7ffe42ffb1b0, nargsf=<optimized out>, nargsf@entry=1, 
    kwargs=kwargs@entry=0x7fdb5a54b590) at Objects/call.c:146
#16 0x000055dfbffb6ff7 in _PyObject_Call_Prepend (tstate=tstate@entry=0x55dfc06e67d0 <_PyRuntime+264816>, callable=0x7fdb5d158350, 
    obj=obj@entry=0x7fdb5cd98dd0, args=args@entry=0x55dfc06c7120 <_PyRuntime+136128>, kwargs=kwargs@entry=0x7fdb5a54b590)
    at Objects/call.c:504
#17 0x000055dfc005d460 in call_method (self=0x7fdb5cd98dd0, attr=<optimized out>, args=0x55dfc06c7120 <_PyRuntime+136128>, 
    kwds=0x7fdb5a54b590) at Objects/typeobject.c:3031
#18 0x000055dfc005d55b in slot_tp_call (self=<optimized out>, args=<optimized out>, kwds=<optimized out>)
    at Objects/typeobject.c:10790
#19 0x000055dfbffb53a7 in _PyObject_MakeTpCall (tstate=tstate@entry=0x55dfc06e67d0 <_PyRuntime+264816>, 
    callable=callable@entry=0x7fdb5cd98dd0, args=args@entry=0x7ffe42ffb338, nargs=<optimized out>, 
    keywords=keywords@entry=0x7fdb5c76f8e0) at Objects/call.c:242
#20 0x000055dfbffb55da in _PyObject_VectorcallTstate (tstate=0x55dfc06e67d0 <_PyRuntime+264816>, 
    callable=callable@entry=0x7fdb5cd98dd0, args=args@entry=0x7ffe42ffb338, nargsf=<optimized out>, 
    kwnames=kwnames@entry=0x7fdb5c76f8e0) at ./Include/internal/pycore_call.h:142
#21 0x000055dfbffb5630 in PyObject_Vectorcall (callable=callable@entry=0x7fdb5cd98dd0, args=args@entry=0x7ffe42ffb338, 
    nargsf=<optimized out>, kwnames=kwnames@entry=0x7fdb5c76f8e0) at Objects/call.c:327
#22 0x000055dfc01087ff in _Py_VectorCall_StackRefSteal (callable=..., callable@entry=..., arguments=0x7fdb5e248290, 
    total_args=total_args@entry=1, kwnames=...) at Python/ceval.c:726
#23 0x000055dfc0114987 in _PyEval_EvalFrameDefault (tstate=<optimized out>, frame=0x7fdb5e248228, throwflag=0)
    at Python/generated_cases.c.h:3686
#24 0x000055dfc012a9fa in _PyEval_EvalFrame (tstate=tstate@entry=0x55dfc06e67d0 <_PyRuntime+264816>, 
    frame=frame@entry=0x7fdb5e247f38, throwflag=throwflag@entry=0) at ./Include/internal/pycore_ceval.h:122
#25 0x000055dfc012abf5 in _PyEval_Vector (tstate=0x55dfc06e67d0 <_PyRuntime+264816>, func=0x7fdb5d158350, locals=locals@entry=0x0, 
    args=0x7fdb5c8bbf48, argcount=<optimized out>, kwnames=0x7fdb4fec7700) at Python/ceval.c:2172
#26 0x000055dfbffb51fd in _PyFunction_Vectorcall (func=<optimized out>, stack=<optimized out>, nargsf=<optimized out>, 
    kwnames=<optimized out>) at Objects/call.c:413
#27 0x000055dfbffb6f0a in _PyObject_VectorcallDictTstate (tstate=tstate@entry=0x55dfc06e67d0 <_PyRuntime+264816>, 
    callable=callable@entry=0x7fdb5d158350, args=args@entry=0x7ffe42ffb6e0, nargsf=<optimized out>, nargsf@entry=1, 
    kwargs=kwargs@entry=0x7fdb4ff245f0) at Objects/call.c:146
#28 0x000055dfbffb6ff7 in _PyObject_Call_Prepend (tstate=tstate@entry=0x55dfc06e67d0 <_PyRuntime+264816>, callable=0x7fdb5d158350, 
    obj=obj@entry=0x7fdb5cdedbb0, args=args@entry=0x55dfc06c7120 <_PyRuntime+136128>, kwargs=kwargs@entry=0x7fdb4ff245f0)
    at Objects/call.c:504
#29 0x000055dfc005d460 in call_method (self=self@entry=0x7fdb5cdedbb0, attr=<optimized out>, 
    args=args@entry=0x55dfc06c7120 <_PyRuntime+136128>, kwds=kwds@entry=0x7fdb4ff245f0) at Objects/typeobject.c:3031
#30 0x000055dfc005d55b in slot_tp_call (self=self@entry=0x7fdb5cdedbb0, args=args@entry=0x55dfc06c7120 <_PyRuntime+136128>, 
    kwds=kwds@entry=0x7fdb4ff245f0) at Objects/typeobject.c:10790
#31 0x000055dfbffb73a0 in _PyObject_Call (tstate=0x55dfc06e67d0 <_PyRuntime+264816>, callable=callable@entry=0x7fdb5cdedbb0, 
    args=args@entry=0x55dfc06c7120 <_PyRuntime+136128>, kwargs=0x7fdb4ff245f0) at Objects/call.c:361
#32 0x000055dfbffb7475 in PyObject_Call (callable=callable@entry=0x7fdb5cdedbb0, args=args@entry=0x55dfc06c7120 <_PyRuntime+136128>, 
    kwargs=<optimized out>) at Objects/call.c:373
#33 0x000055dfc0112ad2 in _PyEval_EvalFrameDefault (tstate=<optimized out>, frame=0x7fdb5e247ea8, throwflag=0)
    at Python/generated_cases.c.h:2831
#34 0x000055dfc012a9fa in _PyEval_EvalFrame (tstate=tstate@entry=0x55dfc06e67d0 <_PyRuntime+264816>, 
    frame=frame@entry=0x7fdb5e247930, throwflag=throwflag@entry=0) at ./Include/internal/pycore_ceval.h:122
#35 0x000055dfc012abf5 in _PyEval_Vector (tstate=0x55dfc06e67d0 <_PyRuntime+264816>, func=0x7fdb5d158350, locals=locals@entry=0x0, 
    args=0x7fdb5c61b648, argcount=<optimized out>, kwnames=0x7fdb4fef1d90) at Python/ceval.c:2172
#36 0x000055dfbffb51fd in _PyFunction_Vectorcall (func=<optimized out>, stack=<optimized out>, nargsf=<optimized out>, 
    kwnames=<optimized out>) at Objects/call.c:413
#37 0x000055dfbffb6f0a in _PyObject_VectorcallDictTstate (tstate=tstate@entry=0x55dfc06e67d0 <_PyRuntime+264816>, 
    callable=callable@entry=0x7fdb5d158350, args=args@entry=0x7ffe42ffbb20, nargsf=<optimized out>, nargsf@entry=1, 
    kwargs=kwargs@entry=0x7fdb4ff212b0) at Objects/call.c:146
#38 0x000055dfbffb6ff7 in _PyObject_Call_Prepend (tstate=tstate@entry=0x55dfc06e67d0 <_PyRuntime+264816>, callable=0x7fdb5d158350, 
    obj=obj@entry=0x7fdb5cdec650, args=args@entry=0x55dfc06c7120 <_PyRuntime+136128>, kwargs=kwargs@entry=0x7fdb4ff212b0)
    at Objects/call.c:504
#39 0x000055dfc005d460 in call_method (self=0x7fdb5cdec650, attr=<optimized out>, args=0x55dfc06c7120 <_PyRuntime+136128>, 
    kwds=0x7fdb4ff212b0) at Objects/typeobject.c:3031
#40 0x000055dfc005d55b in slot_tp_call (self=<optimized out>, args=<optimized out>, kwds=<optimized out>)
    at Objects/typeobject.c:10790
#41 0x000055dfbffb53a7 in _PyObject_MakeTpCall (tstate=tstate@entry=0x55dfc06e67d0 <_PyRuntime+264816>, 
    callable=callable@entry=0x7fdb5cdec650, args=args@entry=0x7ffe42ffbca8, nargs=<optimized out>, 
    keywords=keywords@entry=0x7fdb5d119850) at Objects/call.c:242
#42 0x000055dfbffb55da in _PyObject_VectorcallTstate (tstate=0x55dfc06e67d0 <_PyRuntime+264816>, 
    callable=callable@entry=0x7fdb5cdec650, args=args@entry=0x7ffe42ffbca8, nargsf=<optimized out>, 
    kwnames=kwnames@entry=0x7fdb5d119850) at ./Include/internal/pycore_call.h:142
#43 0x000055dfbffb5630 in PyObject_Vectorcall (callable=callable@entry=0x7fdb5cdec650, args=args@entry=0x7ffe42ffbca8, 
    nargsf=<optimized out>, kwnames=kwnames@entry=0x7fdb5d119850) at Objects/call.c:327
#44 0x000055dfc01087ff in _Py_VectorCall_StackRefSteal (callable=..., callable@entry=..., arguments=0x7fdb5e247918, 
    total_args=total_args@entry=2, kwnames=...) at Python/ceval.c:726
#45 0x000055dfc0114987 in _PyEval_EvalFrameDefault (tstate=<optimized out>, frame=0x7fdb5e247888, throwflag=0)
    at Python/generated_cases.c.h:3686
#46 0x000055dfc012a9fa in _PyEval_EvalFrame (tstate=tstate@entry=0x55dfc06e67d0 <_PyRuntime+264816>, 
    frame=frame@entry=0x7fdb5e247618, throwflag=throwflag@entry=0) at ./Include/internal/pycore_ceval.h:122
#47 0x000055dfc012abf5 in _PyEval_Vector (tstate=0x55dfc06e67d0 <_PyRuntime+264816>, func=0x7fdb5d158350, locals=locals@entry=0x0, 
    args=0x7fdb5c8bb828, argcount=<optimized out>, kwnames=0x7fdb5af16300) at Python/ceval.c:2172
#48 0x000055dfbffb51fd in _PyFunction_Vectorcall (func=<optimized out>, stack=<optimized out>, nargsf=<optimized out>, 
    kwnames=<optimized out>) at Objects/call.c:413
#49 0x000055dfbffb6f0a in _PyObject_VectorcallDictTstate (tstate=tstate@entry=0x55dfc06e67d0 <_PyRuntime+264816>, 
    callable=callable@entry=0x7fdb5d158350, args=args@entry=0x7ffe42ffc050, nargsf=<optimized out>, nargsf@entry=1, 
    kwargs=kwargs@entry=0x7fdb5ada0a10) at Objects/call.c:146
#50 0x000055dfbffb6ff7 in _PyObject_Call_Prepend (tstate=tstate@entry=0x55dfc06e67d0 <_PyRuntime+264816>, callable=0x7fdb5d158350, 
    obj=obj@entry=0x7fdb5cdecb90, args=args@entry=0x55dfc06c7120 <_PyRuntime+136128>, kwargs=kwargs@entry=0x7fdb5ada0a10)
    at Objects/call.c:504
#51 0x000055dfc005d460 in call_method (self=0x7fdb5cdecb90, attr=<optimized out>, args=0x55dfc06c7120 <_PyRuntime+136128>, 
    kwds=0x7fdb5ada0a10) at Objects/typeobject.c:3031
#52 0x000055dfc005d55b in slot_tp_call (self=<optimized out>, args=<optimized out>, kwds=<optimized out>)
    at Objects/typeobject.c:10790
#53 0x000055dfbffb53a7 in _PyObject_MakeTpCall (tstate=tstate@entry=0x55dfc06e67d0 <_PyRuntime+264816>, 
    callable=callable@entry=0x7fdb5cdecb90, args=args@entry=0x7ffe42ffc1f8, nargs=<optimized out>, 
    keywords=keywords@entry=0x7fdb5cd6c870) at Objects/call.c:242
#54 0x000055dfbffb55da in _PyObject_VectorcallTstate (tstate=0x55dfc06e67d0 <_PyRuntime+264816>, 
    callable=callable@entry=0x7fdb5cdecb90, args=args@entry=0x7ffe42ffc1f8, nargsf=<optimized out>, 
    kwnames=kwnames@entry=0x7fdb5cd6c870) at ./Include/internal/pycore_call.h:142
#55 0x000055dfbffb5630 in PyObject_Vectorcall (callable=callable@entry=0x7fdb5cdecb90, args=args@entry=0x7ffe42ffc1f8, 
    nargsf=<optimized out>, kwnames=kwnames@entry=0x7fdb5cd6c870) at Objects/call.c:327
#56 0x000055dfc0108971 in _Py_VectorCallInstrumentation_StackRefSteal (callable=..., callable@entry=..., 
    arguments=arguments@entry=0x7fdb5e247608, total_args=total_args@entry=1, kwnames=kwnames@entry=..., 
    call_instrumentation=call_instrumentation@entry=false, frame=frame@entry=0x7fdb5e247598, this_instr=0x7fdb5cafc532, 
    tstate=0x55dfc06e67d0 <_PyRuntime+264816>) at Python/ceval.c:768
#57 0x000055dfc0114062 in _PyEval_EvalFrameDefault (tstate=<optimized out>, frame=0x7fdb5e247598, throwflag=0)
    at Python/generated_cases.c.h:3474
#58 0x000055dfc012a9fa in _PyEval_EvalFrame (tstate=tstate@entry=0x55dfc06e67d0 <_PyRuntime+264816>, 
    frame=frame@entry=0x7fdb5e2471e0, throwflag=throwflag@entry=0) at ./Include/internal/pycore_ceval.h:122
#59 0x000055dfc012abf5 in _PyEval_Vector (tstate=0x55dfc06e67d0 <_PyRuntime+264816>, func=0x7fdb5d158350, locals=locals@entry=0x0, 
    args=0x7fdb5c8b8a68, argcount=<optimized out>, kwnames=0x7fdb5c36cfa0) at Python/ceval.c:2172
#60 0x000055dfbffb51fd in _PyFunction_Vectorcall (func=<optimized out>, stack=<optimized out>, nargsf=<optimized out>, 
    kwnames=<optimized out>) at Objects/call.c:413
#61 0x000055dfbffb6f0a in _PyObject_VectorcallDictTstate (tstate=tstate@entry=0x55dfc06e67d0 <_PyRuntime+264816>, 
    callable=callable@entry=0x7fdb5d158350, args=args@entry=0x7ffe42ffc5b0, nargsf=<optimized out>, nargsf@entry=1, 
    kwargs=kwargs@entry=0x7fdb5cc39d30) at Objects/call.c:146
#62 0x000055dfbffb6ff7 in _PyObject_Call_Prepend (tstate=tstate@entry=0x55dfc06e67d0 <_PyRuntime+264816>, callable=0x7fdb5d158350, 
    obj=obj@entry=0x7fdb5cd9b2f0, args=args@entry=0x55dfc06c7120 <_PyRuntime+136128>, kwargs=kwargs@entry=0x7fdb5cc39d30)
    at Objects/call.c:504
#63 0x000055dfc005d460 in call_method (self=0x7fdb5cd9b2f0, attr=<optimized out>, args=0x55dfc06c7120 <_PyRuntime+136128>, 
#64 0x000055dfc005d55b in slot_tp_call (self=<optimized out>, args=<optimized out>, kwds=<optimized out>)
    at Objects/typeobject.c:10790
#65 0x000055dfbffb53a7 in _PyObject_MakeTpCall (tstate=tstate@entry=0x55dfc06e67d0 <_PyRuntime+264816>, 
    callable=callable@entry=0x7fdb5cd9b2f0, args=args@entry=0x7ffe42ffc758, nargs=<optimized out>, 
    keywords=keywords@entry=0x7fdb5d58a3f0) at Objects/call.c:242
#66 0x000055dfbffb55da in _PyObject_VectorcallTstate (tstate=0x55dfc06e67d0 <_PyRuntime+264816>, 
    callable=callable@entry=0x7fdb5cd9b2f0, args=args@entry=0x7ffe42ffc758, nargsf=<optimized out>, 
    kwnames=kwnames@entry=0x7fdb5d58a3f0) at ./Include/internal/pycore_call.h:142
#67 0x000055dfbffb5630 in PyObject_Vectorcall (callable=callable@entry=0x7fdb5cd9b2f0, args=args@entry=0x7ffe42ffc758, 
    nargsf=<optimized out>, kwnames=kwnames@entry=0x7fdb5d58a3f0) at Objects/call.c:327
#68 0x000055dfc0108971 in _Py_VectorCallInstrumentation_StackRefSteal (callable=..., callable@entry=..., 
    arguments=arguments@entry=0x7fdb5e2471c0, total_args=total_args@entry=1, kwnames=kwnames@entry=..., 
    call_instrumentation=call_instrumentation@entry=false, frame=frame@entry=0x7fdb5e247120, this_instr=0x55dfffb73e52, 
    tstate=0x55dfc06e67d0 <_PyRuntime+264816>) at Python/ceval.c:768
#69 0x000055dfc0114062 in _PyEval_EvalFrameDefault (tstate=<optimized out>, frame=0x7fdb5e247120, throwflag=0)
    at Python/generated_cases.c.h:3474
#70 0x000055dfc012a9fa in _PyEval_EvalFrame (tstate=tstate@entry=0x55dfc06e67d0 <_PyRuntime+264816>, 
    frame=frame@entry=0x7fdb5e247020, throwflag=throwflag@entry=0) at ./Include/internal/pycore_ceval.h:122
#71 0x000055dfc012abf5 in _PyEval_Vector (tstate=tstate@entry=0x55dfc06e67d0 <_PyRuntime+264816>, func=func@entry=0x7fdb5d666b10, 
    locals=locals@entry=0x7fdb5d66a750, args=args@entry=0x0, argcount=argcount@entry=0, kwnames=kwnames@entry=0x0)
    at Python/ceval.c:2172
#72 0x000055dfc012ad0a in PyEval_EvalCode (co=co@entry=0x55dfff886610, globals=globals@entry=0x7fdb5d66a750, 
    locals=locals@entry=0x7fdb5d66a750) at Python/ceval.c:679
#73 0x000055dfc028407c in run_eval_code_obj (tstate=tstate@entry=0x55dfc06e67d0 <_PyRuntime+264816>, co=co@entry=0x55dfff886610, 
    globals=globals@entry=0x7fdb5d66a750, locals=locals@entry=0x7fdb5d66a750) at Python/pythonrun.c:1406
#74 0x000055dfc0284698 in run_mod (mod=mod@entry=0x55dfff8cfe90, filename=filename@entry=0x7fdb5d557b40, 
    globals=globals@entry=0x7fdb5d66a750, locals=locals@entry=0x7fdb5d66a750, flags=flags@entry=0x7ffe42ffccb8, 
    arena=arena@entry=0x7fdb5d66a800, interactive_src=0x0, generate_new_source=0) at Python/pythonrun.c:1509
#75 0x000055dfc0284fe7 in _PyRun_File (fp=fp@entry=0x55dfff703bb0, filename=filename@entry=0x7fdb5d557b40, start=start@entry=257, 
    globals=globals@entry=0x7fdb5d66a750, locals=locals@entry=0x7fdb5d66a750, closeit=closeit@entry=1, flags=0x7ffe42ffccb8)
    at Python/pythonrun.c:1332
#76 0x000055dfc0285d44 in _PyRun_SimpleFile (fp=fp@entry=0x55dfff703bb0, filename=filename@entry=0x7fdb5d557b40, 
    closeit=closeit@entry=1, flags=flags@entry=0x7ffe42ffccb8) at Python/pythonrun.c:544
#77 0x000055dfc0286a7d in _PyRun_AnyFile (fp=fp@entry=0x55dfff703bb0, filename=filename@entry=0x7fdb5d557b40, 
    closeit=closeit@entry=1, flags=flags@entry=0x7ffe42ffccb8) at Python/pythonrun.c:92
#78 0x000055dfc02b4452 in pymain_run_file_obj (filename=filename@entry=0x7fdb5d557b40, skip_source_first_line=0) at Modules/main.c:478
#79 0x000055dfc02b457b in pymain_run_file (config=config@entry=0x55dfc06c90c0 <_PyRuntime+144224>) at Modules/main.c:494
#80 0x000055dfc02b4a28 in pymain_run_python (exitcode=exitcode@entry=0x7ffe42ffce24) at Modules/main.c:804
#81 0x000055dfc02b4cea in Py_RunMain () at Modules/main.c:891
#82 0x000055dfc02b4d61 in pymain_main (args=args@entry=0x7ffe42ffce80) at Modules/main.c:921
#83 0x000055dfc02b4e2f in Py_BytesMain (argc=<optimized out>, argv=<optimized out>) at Modules/main.c:945
#84 0x000055dfbff0d266 in main (argc=<optimized out>, argv=<optimized out>) at ./Programs/python.c:15

Stepping repeats roughly the following sequence:

0x00007fdb5a4c7026 in py::jit:executor ()
Single stepping until exit from function py::jit:executor,
which has no line number information.
_Py_jit_assert_within_stack_bounds (frame=0x7fdb5a628b98, stack_pointer=0x7fdb5a628c08, lineno=193) at Python/ceval.c:1007
_Py_assert_within_stack_bounds (frame=0x7fdb5a628b98, stack_pointer=0x7fdb5a628c08,
    filename=filename@entry=0x55dfc035222c "executor_cases.c.h", lineno=193) at Python/ceval.c:985
_PyFrame_Stackbase (f=0x7fdb5a628b98) at ./Include/internal/pycore_interpframe.h:102
_PyFrame_GetCode (f=f@entry=0x7fdb5a628b98) at ./Include/internal/pycore_interpframe.h:21
PyStackRef_AsPyObjectBorrow (ref=...) at ./Include/internal/pycore_stackref.h:441
_PyFrame_GetCode (f=f@entry=0x7fdb5a628b98) at ./Include/object.h:234
_Py_assert_within_stack_bounds (frame=0x7fdb5a628b98, stack_pointer=0x7fdb5a628c08,
    filename=filename@entry=0x55dfc035222c "executor_cases.c.h", lineno=193) at Python/ceval.c:990

CPython versions tested on:

3.15, CPython main branch

Operating systems tested on:

Linux

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