Problems with 9.3.beta6 + OS X Big Sur

[John H Palmieri]

On OS X Big Sur (intel), as of the most recent Xcode and homebrew, I am currently unable to build Sage with either homebrew's Python or with `./configure --with-system-python3=no`.

- With homebrew's Python, actually Sage builds but the documentation does not (similar problems on both Big Sur and Catalina), ending with

------------------------------------------------------------------------
0   signals.cpython-39-darwin.so        0x000000010cd40542 print_backtrace + 66
1   signals.cpython-39-darwin.so        0x000000010cd44167 sigdie + 39
2   signals.cpython-39-darwin.so        0x000000010cd4406a cysigs_signal_handler + 282
3   libsystem_platform.dylib            0x00007fff203bcd7d _sigtramp + 29
4   ???                                 0x000000000000003f 0x0 + 63
5   libtcl8.6.dylib                     0x000000032998c72e AtForkPrepare + 38
6   libsystem_pthread.dylib             0x00007fff203781a3 _pthread_atfork_prepare_handlers + 90
7   libSystem.B.dylib                   0x00007fff2a575934 libSystem_atfork_prepare + 11
8   libsystem_c.dylib                   0x00007fff2025bb1b fork + 12
9   _posixsubprocess.cpython-39-darwin. 0x000000010b63db89 subprocess_fork_exec + 1573
10  Python                              0x000000010af10904 cfunction_call + 127
11  Python                              0x000000010aedffa3 _PyObject_MakeTpCall + 266
12  Python                              0x000000010af88027 call_function + 455
...
157 Python                              0x000000010afcf10f Py_BytesMain + 42
158 libdyld.dylib                       0x00007fff20393621 start + 1
------------------------------------------------------------------------
Unhandled SIGILL: An illegal instruction 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.
------------------------------------------------------------------------
...
  File "/Users/palmieri/Desktop/Sage/sage_builds/TESTING/sage-9.3.beta6/local/lib/python3.9/site-packages/sage_setup/docbuild/utils.py", line 221, in reap_workers
    w = bring_out_yer_dead(w, task, exitcode)
  File "/Users/palmieri/Desktop/Sage/sage_builds/TESTING/sage-9.3.beta6/local/lib/python3.9/site-packages/sage_setup/docbuild/utils.py", line 157, in bring_out_yer_dead
    raise WorkerDiedException(
sage_setup.docbuild.utils.WorkerDiedException: worker for ('reference/misc', 'en', 'html', {}) died with non-zero exit code -4

- With `./configure --with-system-python3=no`, Python fails to build (on Big Sur only; it succeeds on Catalina), saying

ModuleNotFoundError: No module named 'readline'

and

ModuleNotFoundError: No module named 'zlib'

Any suggestions?

--
John

[Zachary Scherr]

For the --with-system-python3=no, I don't know what the problem is but I think it was fixed by upgrading to python 3.9 in https://trac.sagemath.org/ticket/30589

[John H Palmieri]

Right, thank you. Python 3.9 builds successfully.

[Dima Pasechnik]

On Wed, 3 Feb 2021, 17:03 John H Palmieri, <jhpalm...@gmail.com> wrote:

Right, thank you. Python 3.9 builds successfully.

On Monday, February 1, 2021 at 7:14:29 PM UTC-8 zsc...@gmail.com wrote:

For the --with-system-python3=no, I don't know what the problem is but I think it was fixed by upgrading to python 3.9 in https://trac.sagemath.org/ticket/30589

On Monday, February 1, 2021 at 9:45:37 PM UTC-5 John H Palmieri wrote:

On OS X Big Sur (intel), as of the most recent Xcode and homebrew, I am currently unable to build Sage with either homebrew's Python or with `./configure --with-system-python3=no`.

- With homebrew's Python, actually Sage builds but the documentation does not (similar problems on both Big Sur and Catalina), ending with

yes, I see this too. (with latest Homebrew python 3.9.)

What exactly is broken there?

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[Zachary Scherr]

I found something possibly relevant at

https://bugs.python.org/issue42691

although there the complaint was that Homebrew built python against system tcl and the suggestion was that Homebrew use its own tcl-tk.  It seems that Homebrew is correctly using its own tcl-tk

since the line

5   libtcl8.6.dylib                     0x000000032998c72e AtForkPrepare + 38

says that python is using tcl 8.6 and system tcl is 8.5.  No idea what's going on, but it might be good to try to produce a minimal reproducible example to show to the python/tcl people.

[Dima Pasechnik]

Probably https://bugs.python.org/issue19733 is still relevant?
Note messages

test_image (tkinter.test.test_ttk.test_widgets.ButtonTest) ... skipped
'crashes with Cocoa Tk (issue19733)'

one gets by running

python3 runtktests.py

Even though 19733 was closed, it's not clear whether they tested on macOS 11.


in
/usr/local/Cellar/python@3.9/3.9.1_7/Frameworks/Python.framework/Versions/3.9/lib/python3.9/tkinter/test/

> To view this discussion on the web visit https://groups.google.com/d/msgid/sage-devel/3fb997ca-0484-422c-a9b8-bcd3c270eea7n%40googlegroups.com.

[Matthias Koeppe]

Fixed in https://trac.sagemath.org/ticket/31344

[dwb...@gmail.com]

Even after applying the fix in #31344 I still get a similar crash building the documentation. I am attaching my dochtml.log.

Daniel Bump

[Matthias Koeppe]

Please try the current branch on https://trac.sagemath.org/ticket/31344, we have added another fix.

[dwb...@gmail.com]

With this, I can now build the documentation. (Thanks!)