Stack overflow when displaying a result

[ranocha]

Describe the bug

I get the following stack overflow error when trying to display a result:

julia> import Pkg; Pkg.activate(temp = true); Pkg.add("SymPyPythonCall")
[...]
  [3709ef60] + CommonEq v0.2.1
  [38540f10] + CommonSolve v0.2.4
  [992eb4ea] + CondaPkg v0.2.33
  [9a962f9c] + DataAPI v1.16.0
  [e2d170a0] + DataValueInterfaces v1.0.0
  [ffbed154] + DocStringExtensions v0.9.5
  [1fa38f19] + Format v1.3.7
  [92d709cd] + IrrationalConstants v0.2.6
  [82899510] + IteratorInterfaceExtensions v1.0.0
  [692b3bcd] + JLLWrappers v1.7.1
  [0f8b85d8] + JSON3 v1.14.3
  [b964fa9f] + LaTeXStrings v1.4.0
  [23fbe1c1] + Latexify v0.16.10
  [2ab3a3ac] + LogExpFunctions v0.3.29
  [1914dd2f] + MacroTools v0.5.16
  [0b3b1443] + MicroMamba v0.1.14
  [bac558e1] + OrderedCollections v1.8.1
  [69de0a69] + Parsers v2.8.3
  [fa939f87] + Pidfile v1.3.0
⌅ [aea7be01] + PrecompileTools v1.2.1
  [21216c6a] + Preferences v1.5.0
  [6099a3de] + PythonCall v0.9.28
  [3cdcf5f2] + RecipesBase v1.3.4
  [ae029012] + Requires v1.3.1
  [6c6a2e73] + Scratch v1.3.0
  [276daf66] + SpecialFunctions v2.6.1
  [856f2bd8] + StructTypes v1.11.0
  [458b697b] + SymPyCore v0.3.2
  [bc8888f7] + SymPyPythonCall v0.5.1
  [3783bdb8] + TableTraits v1.0.1
  [bd369af6] + Tables v1.12.1
  [8ea1fca8] + TermInterface v2.0.0
  [e17b2a0c] + UnsafePointers v1.0.0
  [61579ee1] + Ghostscript_jll v9.55.1+0
  [aacddb02] + JpegTurbo_jll v3.1.3+0
  [efe28fd5] + OpenSpecFun_jll v0.5.6+0
⌅ [f8abcde7] + micromamba_jll v1.5.12+0
  [4d7b5844] + pixi_jll v0.41.3+0
  [0dad84c5] + ArgTools v1.1.1
  [56f22d72] + Artifacts
  [2a0f44e3] + Base64
  [ade2ca70] + Dates
  [f43a241f] + Downloads v1.6.0
  [7b1f6079] + FileWatching
  [b77e0a4c] + InteractiveUtils
  [4af54fe1] + LazyArtifacts
  [b27032c2] + LibCURL v0.6.4
  [76f85450] + LibGit2
  [8f399da3] + Libdl
  [37e2e46d] + LinearAlgebra
  [56ddb016] + Logging
  [d6f4376e] + Markdown
  [a63ad114] + Mmap
  [ca575930] + NetworkOptions v1.2.0
  [44cfe95a] + Pkg v1.10.0
  [de0858da] + Printf
  [3fa0cd96] + REPL
  [9a3f8284] + Random
  [ea8e919c] + SHA v0.7.0
  [9e88b42a] + Serialization
  [6462fe0b] + Sockets
  [fa267f1f] + TOML v1.0.3
  [a4e569a6] + Tar v1.10.0
  [8dfed614] + Test
  [cf7118a7] + UUIDs
  [4ec0a83e] + Unicode
  [e66e0078] + CompilerSupportLibraries_jll v1.1.1+0
  [deac9b47] + LibCURL_jll v8.4.0+0
  [e37daf67] + LibGit2_jll v1.6.4+0
  [29816b5a] + LibSSH2_jll v1.11.0+1
  [c8ffd9c3] + MbedTLS_jll v2.28.2+1
  [14a3606d] + MozillaCACerts_jll v2023.1.10
  [4536629a] + OpenBLAS_jll v0.3.23+4
  [05823500] + OpenLibm_jll v0.8.5+0
  [83775a58] + Zlib_jll v1.2.13+1
  [8e850b90] + libblastrampoline_jll v5.11.0+0
  [8e850ede] + nghttp2_jll v1.52.0+1
  [3f19e933] + p7zip_jll v17.4.0+2

julia> using SymPyPythonCall

julia> @syms x
(Fatal Python error: _Py_CheckRecursiveCall: Unrecoverable stack overflow (used 1691739 kB) while calling a Python object
Python runtime state: initialized

Current thread 0x00000001f012c800 (most recent call first):
  <no Python frame>

[60501] signal (6): Abort trap: 6
in expression starting at none:0
__pthread_kill at /usr/lib/system/libsystem_kernel.dylib (unknown line)
Allocations: 26810136 (Pool: 26776970; Big: 33166); GC: 47
zsh: abort      julia

Expected behavior

The return value is displayed without any errors.

Desktop (please complete the following information):

• OS: macOS
• Version: Tahoe 26.0.1

Additional context

Just executing the expression without showing the result works, e.g.,

julia> @syms x;

julia> sympy.sqrt(3);

julia> sympy.sqrt(3) |> println
sqrt(3)

I get similar stack overflow errors for other displays, such as

julia> sympy.sqrt(3)
Fatal Python error: _Py_CheckRecursiveCall: Unrecoverable stack overflow (used 1622907 kB) while calling a Python object
Python runtime state: initialized

Current thread 0x00000001f012c800 (most recent call first):
  <no Python frame>

[60422] signal (6): Abort trap: 6
in expression starting at none:0
__pthread_kill at /usr/lib/system/libsystem_kernel.dylib (unknown line)
Allocations: 26112280 (Pool: 26079501; Big: 32779); GC: 46
zsh: abort      julia

[jverzani]

Hmm, I can't replicate. I haven't upgraded to the new Mac OS X yet, I wonder if the issue lies there. Do you get a similar problem if you show the underlying python object:

julia> sympy.sqrt(3).o
Python: sqrt(3)

[ranocha]

Yes:

julia> sympy.sqrt(3).o
Fatal Python error: _Py_CheckRecursiveCall: Unrecoverable stack overflow (used 1703659 kB) while getting the repr of an obj
Python runtime state: initialized

Current thread 0x00000001f012c800 (most recent call first):
  <no Python frame>

[65007] signal (6): Abort trap: 6
in expression starting at none:0
__pthread_kill at /usr/lib/system/libsystem_kernel.dylib (unknown line)
Allocations: 26776263 (Pool: 26742703; Big: 33560); GC: 48
zsh: abort      julia

I can also confirm that SymPyPythonCall.jl worked fine for me some time ago - likely before the update to macOS Tahoe.

[jverzani]

I'm not sure what to do. I'm guessing this also gives and error:

julia> using PythonCall

julia> sympy = PythonCall.pyimport("sympy")
Python: <module 'sympy' from '/private/tmp/.CondaPkg/.pixi/envs/default/lib/python3.14/site-packages/sympy/__init__.py'>

julia> sympy.sqrt(3)
Python: sqrt(3)  # <<--- fails for you?

[ranocha]

It fails already at

julia> sympy = PythonCall.pyimport("sympy")
ERROR: Python: Fatal Python error: _Py_CheckRecursiveCall: Unrecoverable stack overflow (used 1622906 kB) while calling a Python object
Python runtime state: initialized

Current thread 0x00000001f012c800 (most recent call first):
  <no Python frame>

[83085] signal (6): Abort trap: 6
in expression starting at none:0
__pthread_kill at /usr/lib/system/libsystem_kernel.dylib (unknown line)
Allocations: 9404921 (Pool: 9395932; Big: 8989); GC: 14
zsh: abort      julia

[jverzani]

I'm seeing that as well even with PyCall. I don't know if there is anything I can do within this package. (Oddly though, I can get an error with PyCall, but under SymPy it doesn't.)