PyCall.py2array errors on adjoint.

on my Windows machine
```
using PyCall
@pyimport pandas as pd
pd.DataFrame([1 2.2 3]')|>x->PyCall.py2array(Array,x)
```
gives
`
Please submit a bug report with steps to reproduce this fault, and any error messages that follow (in their entirety). Thanks.
Exception: EXCEPTION_ACCESS_VIOLATION at 0x7ff8b3d1ec77 -- PyObject_GetBuffer at C:\Users\xxx\.julia\conda\3\x86_64\python310.dll (unknown line)
in expression starting at REPL[87]:1
PyObject_GetBuffer at C:\Users\chs72fw\.julia\conda\3\x86_64\python310.dll (unknown line)
isbuftype! at C:\Users\chs72fw\.julia\packages\PyCall\1gn3u\src\pybuffer.jl:134 [inlined]
py2array at C:\Users\chs72fw\.julia\packages\PyCall\1gn3u\src\conversions.jl:400
convert at C:\Users\chs72fw\.julia\packages\PyCall\1gn3u\src\conversions.jl:421
jfptr_convert_8829 at C:\Users\chs72fw\.julia\compiled\v1.11\PyCall\GkzkC_1UwCw.dll (unknown line)
py2array at C:\Users\chs72fw\.julia\packages\PyCall\1gn3u\src\conversions.jl:350
unknown function (ip: 000002c286acea0c)
py2array at C:\Users\chs72fw\.julia\packages\PyCall\1gn3u\src\conversions.jl:407
#341 at .\REPL[87]:1 [inlined]
|> at .\operators.jl:926
unknown function (ip: 000002c286ace28b)
jl_apply at C:/workdir/src\julia.h:2157 [inlined]
do_call at C:/workdir/src\interpreter.c:126
eval_value at C:/workdir/src\interpreter.c:223
eval_stmt_value at C:/workdir/src\interpreter.c:174 [inlined]
eval_body at C:/workdir/src\interpreter.c:681
jl_interpret_toplevel_thunk at C:/workdir/src\interpreter.c:821
jl_toplevel_eval_flex at C:/workdir/src\toplevel.c:943
jl_toplevel_eval_flex at C:/workdir/src\toplevel.c:886
ijl_toplevel_eval at C:/workdir/src\toplevel.c:952 [inlined]
ijl_toplevel_eval_in at C:/workdir/src\toplevel.c:994
eval at .\boot.jl:430 [inlined]
eval_user_input at C:\workdir\usr\share\julia\stdlib\v1.11\REPL\src\REPL.jl:245
repl_backend_loop at C:\workdir\usr\share\julia\stdlib\v1.11\REPL\src\REPL.jl:342
#start_repl_backend#59 at C:\workdir\usr\share\julia\stdlib\v1.11\REPL\src\REPL.jl:327
start_repl_backend at C:\workdir\usr\share\julia\stdlib\v1.11\REPL\src\REPL.jl:324
#run_repl#72 at C:\workdir\usr\share\julia\stdlib\v1.11\REPL\src\REPL.jl:483
run_repl at C:\workdir\usr\share\julia\stdlib\v1.11\REPL\src\REPL.jl:469
jfptr_run_repl_10352 at C:\Users\chs72fw\.julia\juliaup\julia-1.11.1+0.x64.w64.mingw32\share\julia\compiled\v1.11\REPL\u0gqU_e6ieL.dll (unknown line)
#1139 at .\client.jl:446
jfptr_YY.1139_15054 at C:\Users\chs72fw\.julia\juliaup\julia-1.11.1+0.x64.w64.mingw32\share\julia\compiled\v1.11\REPL\u0gqU_e6ieL.dll (unknown line)
jl_apply at C:/workdir/src\julia.h:2157 [inlined]
jl_f__call_latest at C:/workdir/src\builtins.c:875
#invokelatest#2 at .\essentials.jl:1055 [inlined]
invokelatest at .\essentials.jl:1052 [inlined]
run_main_repl at .\client.jl:430
repl_main at .\client.jl:567 [inlined]
_start at .\client.jl:541
jfptr__start_73819.1 at C:\Users\xxx\.julia\juliaup\julia-1.11.1+0.x64.w64.mingw32\lib\julia\sys.dll (unknown line)
jl_apply at C:/workdir/src\julia.h:2157 [inlined]
true_main at C:/workdir/src\jlapi.c:900
jl_repl_entrypoint at C:/workdir/src\jlapi.c:1059
mainCRTStartup at C:/workdir/cli\loader_exe.c:58
BaseThreadInitThunk at C:\WINDOWS\System32\KERNEL32.DLL (unknown line)
RtlUserThreadStart at C:\WINDOWS\SYSTEM32\ntdll.dll (unknown line)
Allocations: 154153994 (Pool: 154148040; Big: 5954); GC: 300
`
similar on osx:
`
[6740] signal 11 (1): Segmentation fault: 11
in expression starting at REPL[3]:1
PyObject_GetBuffer at /Users/apfel/.julia/conda/3/x86_64/lib/libpython3.10.dylib (unknown line)
isbuftype! at /Users/apfel/.julia/packages/PyCall/1gn3u/src/pybuffer.jl:134 [inlined]
py2array at /Users/apfel/.julia/packages/PyCall/1gn3u/src/conversions.jl:400
convert at /Users/apfel/.julia/packages/PyCall/1gn3u/src/conversions.jl:421
jfptr_convert_8689 at /Users/apfel/.julia/compiled/v1.11/PyCall/GkzkC_xBpQw.dylib (unknown line)
py2array at /Users/apfel/.julia/packages/PyCall/1gn3u/src/conversions.jl:350
unknown function (ip: 0x117f671b8)
py2array at /Users/apfel/.julia/packages/PyCall/1gn3u/src/conversions.jl:407
#1 at ./REPL[3]:1 [inlined]
|> at ./operators.jl:926
unknown function (ip: 0x117f66989)
jl_apply at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-macmini-x64-5.0/build/default-macmini-x64-5-0/julialang/julia-master/src/./julia.h:2157 [inlined]
do_call at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-macmini-x64-5.0/build/default-macmini-x64-5-0/julialang/julia-master/src/interpreter.c:126
eval_stmt_value at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-macmini-x64-5.0/build/default-macmini-x64-5-0/julialang/julia-master/src/interpreter.c:174
eval_body at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-macmini-x64-5.0/build/default-macmini-x64-5-0/julialang/julia-master/src/interpreter.c:663
jl_interpret_toplevel_thunk at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-macmini-x64-5.0/build/default-macmini-x64-5-0/julialang/julia-master/src/interpreter.c:821
jl_toplevel_eval_flex at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-macmini-x64-5.0/build/default-macmini-x64-5-0/julialang/julia-master/src/toplevel.c:943
jl_toplevel_eval_flex at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-macmini-x64-5.0/build/default-macmini-x64-5-0/julialang/julia-master/src/toplevel.c:886
ijl_toplevel_eval at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-macmini-x64-5.0/build/default-macmini-x64-5-0/julialang/julia-master/src/toplevel.c:952 [inlined]
ijl_toplevel_eval_in at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-macmini-x64-5.0/build/default-macmini-x64-5-0/julialang/julia-master/src/toplevel.c:994
eval at ./boot.jl:430 [inlined]
eval_user_input at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-macmini-x64-5.0/build/default-macmini-x64-5-0/julialang/julia-master/usr/share/julia/stdlib/v1.11/REPL/src/REPL.jl:245
repl_backend_loop at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-macmini-x64-5.0/build/default-macmini-x64-5-0/julialang/julia-master/usr/share/julia/stdlib/v1.11/REPL/src/REPL.jl:342
#start_repl_backend#59 at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-macmini-x64-5.0/build/default-macmini-x64-5-0/julialang/julia-master/usr/share/julia/stdlib/v1.11/REPL/src/REPL.jl:327
start_repl_backend at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-macmini-x64-5.0/build/default-macmini-x64-5-0/julialang/julia-master/usr/share/julia/stdlib/v1.11/REPL/src/REPL.jl:324
#run_repl#72 at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-macmini-x64-5.0/build/default-macmini-x64-5-0/julialang/julia-master/usr/share/julia/stdlib/v1.11/REPL/src/REPL.jl:483
run_repl at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-macmini-x64-5.0/build/default-macmini-x64-5-0/julialang/julia-master/usr/share/julia/stdlib/v1.11/REPL/src/REPL.jl:469
jfptr_run_repl_10090 at /Users/apfel/.julia/juliaup/julia-1.11.1+0.x64.apple.darwin14/share/julia/compiled/v1.11/REPL/u0gqU_D0D38.dylib (unknown line)
#1139 at ./client.jl:446
jfptr_YY.1139_14579 at /Users/apfel/.julia/juliaup/julia-1.11.1+0.x64.apple.darwin14/share/julia/compiled/v1.11/REPL/u0gqU_D0D38.dylib (unknown line)
jl_apply at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-macmini-x64-5.0/build/default-macmini-x64-5-0/julialang/julia-master/src/./julia.h:2157 [inlined]
jl_f__call_latest at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-macmini-x64-5.0/build/default-macmini-x64-5-0/julialang/julia-master/src/builtins.c:875
#invokelatest#2 at ./essentials.jl:1055 [inlined]
invokelatest at ./essentials.jl:1052 [inlined]
run_main_repl at ./client.jl:430
repl_main at ./client.jl:567 [inlined]
_start at ./client.jl:541
jfptr__start_72559.1 at /Users/apfel/.julia/juliaup/julia-1.11.1+0.x64.apple.darwin14/lib/julia/sys.dylib (unknown line)
jl_apply at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-macmini-x64-5.0/build/default-macmini-x64-5-0/julialang/julia-master/src/./julia.h:2157 [inlined]
true_main at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-macmini-x64-5.0/build/default-macmini-x64-5-0/julialang/julia-master/src/jlapi.c:900
jl_repl_entrypoint at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-macmini-x64-5.0/build/default-macmini-x64-5-0/julialang/julia-master/src/jlapi.c:1059
Allocations: 1392531 (Pool: 1392469; Big: 62); GC: 2
Segmentation fault: 11
`

Reproduce the pandas DataFrame conversion shown in the issue on Windows and macOS, then inspect src/pybuffer.jl:134 and src/conversions.jl:350,400,407,421, where the stack trace enters PyCall. Compare the failing adjoint conversion with related conversion paths. Done means the reproducer no longer crashes and regression coverage verifies the behavior.

Vom Indexierungsmodell aus dem Issue-Text verfasst.