Is this new behaviour?

[Martin R]

sage: limit(x^(1/sqrt(x)), x=0)

Condition of type: SIMPLE-CONDITION
Undefined limit product $MINF * $ZEROA in lim-times
Available restarts:

1. (CONTINUE) Return from BREAK.

Top level in: #<process TOP-LEVEL 0x7d78c784bf80>.
>

[OHappyDay]

10.8 seems to behave the same way. Also the appimages show the same behaviour.

After pressing CTRL-D I get this dump:

sage: limit(x^(1/sqrt(x)),x=0)

Condition of type: SIMPLE-CONDITION
Undefined limit product $MINF * $ZEROA in lim-times
Available restarts:

1. (CONTINUE) Return from BREAK.

Top level in: #<process TOP-LEVEL 0x78caab987f80>.
>  
------------------------------------------------------------------------
/datadisk/apps/sage-10.9/local/var/lib/sage/venv-python3.12/lib/python3.12/site-packages/cysignals/signals.cpython-312-x86_64-linux-gnu.so(+0x8754)[0x78cb041e5754]
/datadisk/apps/sage-10.9/local/var/lib/sage/venv-python3.12/lib/python3.12/site-packages/cysignals/signals.cpython-312-x86_64-linux-gnu.so(+0x8816)[0x78cb041e5816]
/datadisk/apps/sage-10.9/local/var/lib/sage/venv-python3.12/lib/python3.12/site-packages/cysignals/signals.cpython-312-x86_64-linux-gnu.so(+0x8bea)[0x78cb041e5bea]
/lib/x86_64-linux-gnu/libc.so.6(+0x45330)[0x78cb04245330]
python3(PyException_GetTraceback+0x4)[0x552fa4]
python3(PyTraceBack_Here+0x28)[0x610798]
/datadisk/apps/sage-10.9/build/sage-distro/src/sage/libs/ecl.cpython-312-x86_64-linux-gnu.so(+0xfddd)[0x78caaba5cddd]
/datadisk/apps/sage-10.9/build/sage-distro/src/sage/libs/ecl.cpython-312-x86_64-linux-gnu.so(+0x17858)[0x78caaba64858]
python3(_PyObject_MakeTpCall+0x75)[0x5492b5]
python3(_PyEval_EvalFrameDefault+0xa89)[0x5d7389]
python3(PyEval_EvalCode+0x15b)[0x5d58bb]
python3[0x5d36ac]
python3[0x58206d]
python3(PyObject_Vectorcall+0x35)[0x549cb5]
python3(_PyEval_EvalFrameDefault+0xa89)[0x5d7389]
python3[0x555caf]
python3[0x551a54]
python3(PyObject_Vectorcall+0x35)[0x549cb5]
python3(_PyEval_EvalFrameDefault+0xa89)[0x5d7389]
python3(PyEval_EvalCode+0x15b)[0x5d58bb]
python3[0x608b52]
python3[0x6b5263]
python3(_PyRun_SimpleFileObject+0x1aa)[0x6b4fca]
python3(_PyRun_AnyFileObject+0x4f)[0x6b4dff]
python3(Py_RunMain+0x3b5)[0x6bce65]
python3(Py_BytesMain+0x2d)[0x6bc94d]
/lib/x86_64-linux-gnu/libc.so.6(+0x2a1ca)[0x78cb0422a1ca]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0x8b)[0x78cb0422a28b]
python3(_start+0x25)[0x657b05]
------------------------------------------------------------------------
Attaching gdb to process id 21281.
GNU gdb (Ubuntu 15.1-1ubuntu1~24.04.1) 15.1
Copyright (C) 2024 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
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There is NO WARRANTY, to the extent permitted by law.
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This GDB was configured as "x86_64-linux-gnu".
Type "show configuration" for configuration details.
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<https://www.gnu.org/software/gdb/bugs/>.
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For help, type "help".
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[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
0x000078cb04310813 in __GI___wait4 (pid=21413, stat_loc=stat_loc@entry=0x0,  
   options=options@entry=0, usage=usage@entry=0x0)
   at ../sysdeps/unix/sysv/linux/wait4.c:30

Stack backtrace
---------------
   stat_loc=stat_loc@entry=0x0, options=options@entry=0,  
   usage=usage@entry=0x0) at ../sysdeps/unix/sysv/linux/wait4.c:30
       sc_ret = -512
       sc_cancel_oldtype = 0
       sc_ret = <optimized out>
#1  0x000078cb0431091b in __GI___waitpid (pid=<optimized out>,  
   stat_loc=stat_loc@entry=0x0, options=options@entry=0)
   at ./posix/waitpid.c:38
No locals.
#2  0x000078cb041e587d in print_enhanced_backtrace ()
   at ../src/cysignals/implementation.c:780
       parent_pid = 21281
       pid = <optimized out>
#3  sigdie (sig=sig@entry=11,  
   s=s@entry=0x78cb041ec6a0 "Unhandled SIGSEGV: A segmentation fault occurred.") at ../src/cysignals/implementation.c:806
No locals.
#4  0x000078cb041e5bea in sigdie_for_sig (inside=0, sig=11)
   at ../src/cysignals/implementation.c:262
No locals.
#5  cysigs_signal_handler (sig=11) at ../src/cysignals/implementation.c:464
       inside = <optimized out>
#6  <signal handler called>
No locals.
#7  0x0000000000552fa4 in PyException_GetTraceback ()
No symbol table info available.
#8  0x0000000000610798 in PyTraceBack_Here ()
No symbol table info available.
#9  0x000078caaba5cddd in __Pyx_AddTraceback (funcname=<optimized out>,  
   py_line=828, filename=<optimized out>, c_line=<optimized out>)
   at src/sage/libs/ecl.cpython-312-x86_64-linux-gnu.so.p/src/sage/libs/ecl.pyx.c:21512
       py_code = 0x78caabaa4e00
       py_frame = 0x78caac5cea70
       tstate = <optimized out>
       ptype = <optimized out>
       pvalue = <optimized out>
       ptraceback = <optimized out>
       bad = <optimized out>
#10 0x000078caaba64858 in __pyx_pf_4sage_4libs_3ecl_9EclObject_14__call__ (
   __pyx_v_args=0x78caabc71720, __pyx_v_self=0x78caac6fa0a0)
   at src/sage/libs/ecl.cpython-312-x86_64-linux-gnu.so.p/src/sage/libs/ecl.pyx.c:11079
       __pyx_v_lispargs = 0x78caac50c6c0
       __pyx_t_3 = 0x0
       __pyx_clineno = 0
       __pyx_r = 0x0
       __pyx_t_1 = 0x0
       __pyx_t_4 = 1
       __pyx_filename = 0x78caaba6c4d0 "sage/libs/ecl.pyx"
       __pyx_L1_error = <optimized out>
       __pyx_t_2 = 0x0
       __pyx_t_5 = <optimized out>
       __pyx_lineno = 828
       __pyx_L0 = <optimized out>
       __pyx_v_lispargs = <optimized out>
       __pyx_r = <optimized out>
       __pyx_t_1 = <optimized out>
       __pyx_t_2 = <optimized out>
       __pyx_t_3 = <optimized out>
       __pyx_t_4 = <optimized out>
       __pyx_t_5 = <optimized out>
       __pyx_lineno = <optimized out>
       __pyx_filename = <optimized out>
       __pyx_clineno = <optimized out>
       __pyx_L1_error = <optimized out>
       __pyx_L0 = <optimized out>
       __pyx_callargs = <optimized out>
#11 __pyx_pw_4sage_4libs_3ecl_9EclObject_15__call__ (
   __pyx_v_self=0x78caac6fa0a0, __pyx_args=0x78caabc71720,  
   __pyx_kwds=<optimized out>)
   at src/sage/libs/ecl.cpython-312-x86_64-linux-gnu.so.p/src/sage/libs/ecl.pyx.c:11007
       __pyx_v_args = 0x78caabc71720
       __pyx_nargs = <optimized out>
       __pyx_kwvalues = 0x0
       __pyx_r = 0x0
       __pyx_kwds_len = <optimized out>
#12 0x00000000005492b5 in _PyObject_MakeTpCall ()
No symbol table info available.
#13 0x00000000005d7389 in _PyEval_EvalFrameDefault ()
No symbol table info available.
#14 0x00000000005d58bb in PyEval_EvalCode ()
No symbol table info available.
#15 0x00000000005d36ac in ?? ()
No symbol table info available.
#16 0x000000000058206d in ?? ()
No symbol table info available.
#17 0x0000000000549cb5 in PyObject_Vectorcall ()
No symbol table info available.
#18 0x00000000005d7389 in _PyEval_EvalFrameDefault ()
No symbol table info available.
#19 0x0000000000555caf in ?? ()
No symbol table info available.
#20 0x0000000000551a54 in ?? ()
No symbol table info available.
#21 0x0000000000549cb5 in PyObject_Vectorcall ()
No symbol table info available.
#22 0x00000000005d7389 in _PyEval_EvalFrameDefault ()
No symbol table info available.
#23 0x00000000005d58bb in PyEval_EvalCode ()
No symbol table info available.
#24 0x0000000000608b52 in ?? ()
No symbol table info available.
#25 0x00000000006b5263 in ?? ()
No symbol table info available.
#26 0x00000000006b4fca in _PyRun_SimpleFileObject ()
No symbol table info available.
#27 0x00000000006b4dff in _PyRun_AnyFileObject ()
No symbol table info available.
#28 0x00000000006bce65 in Py_RunMain ()
No symbol table info available.
#29 0x00000000006bc94d in Py_BytesMain ()
No symbol table info available.
#30 0x000078cb0422a1ca in __libc_start_call_main (main=main@entry=0x518c60,  
   argc=argc@entry=3, argv=argv@entry=0x7ffe2f3eec18)
   at ../sysdeps/nptl/libc_start_call_main.h:58
       self = <optimized out>
       result = <optimized out>
       unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140729691073560,  
               5895170405948743079, 3, 0, 10649040, 132813347000320,  
               5895170405963423143, 6892069254013279655},  
             mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x3,  
             0x7ffe2f3eec10}, data = {prev = 0x0, cleanup = 0x0,  
             canceltype = 3}}}
       not_first_call = <optimized out>
#31 0x000078cb0422a28b in __libc_start_main_impl (main=0x518c60, argc=3,  
   argv=0x7ffe2f3eec18, init=<optimized out>, fini=<optimized out>,  
   rtld_fini=<optimized out>, stack_end=0x7ffe2f3eec08)
   at ../csu/libc-start.c:360
No locals.
#32 0x0000000000657b05 in _start ()
No symbol table info available.
[Inferior 1 (process 21281) detached]
Warnung: 30     ../sysdeps/unix/sysv/linux/wait4.c: Datei oder Verzeichnis nicht gefunden
Python Exception <class 'ModuleNotFoundError'>: No module named 'Cython'
Error occurred in Python: No module named 'Cython'
Saved trace to /home/klaus/.sage/crash_logs/crash_g8vo06r7.log
------------------------------------------------------------------------
Unhandled SIGSEGV: A segmentation fault occurred.
This probably occurred because a *compiled* module has a bug
in it and is not properly wrapped with sig_on(), sig_off().
Python will now terminate.
------------------------------------------------------------------------
Speicherzugriffsfehler (Speicherabzug geschrieben)

[Martin R]

I can now confirm that this is also present in sage 8.0 (!).

[Antonio Rojas]

Works fine with system maxima 5.49, so will likely be fixed by https://github.com/sagemath/sage/pull/41879