I can tell you something about where it came from.
When I look at sage/local/lib/python3.14/site-packages/sage/config.py I
see:
*# The semicolon-separated list of GAP root paths. This is the list of#
locations that are searched for GAP packages. This is passed directly# to
GAP via the -l flag.GAP_ROOT_PATHS =
"ESC[?1034h/var/tmp/sage-10.9/local/lib/gap/;/var/tmp/sage-10.9/local/share/gap/".replace("${prefix}",
SAGE_LOCAL)*
The file config.py is generated from sage/src/sage/config.py.in, which
contains:
*# The semicolon-separated list of GAP root paths. This is the list of#
locations that are searched for GAP packages. This is passed directly# to
GAP via the -l flag.GAP_ROOT_PATHS =
"@GAP_ROOT_PATHS@".replace("${prefix}", SAGE_LOCAL)*
So it would seem that some m4 file is inserting the "enable 8 bit meta"
escape sequence into @GAP_ROOT_PATHS@ for my enjoyment and entertainment.
Also, when I remove that escape sequence from config.py, guess what?
sage: gap.FreeGroup(3)
Group( [ f1, f2, f3 ] )
- Marc
On Monday, March 2, 2026 at 11:35:18 PM UTC-6 [email protected] wrote:
> "\033[?1034h/var/tmp/sage-10.9/local/lib/gap/" is certainly looking bad,
> and probably is the root of the problem.
>
> No idea where it came from.
>
>
>
> On Mon, Mar 2, 2026 at 9:52 PM Marc Culler <[email protected]> wrote:
>
>> I deleted .sage/gap and tried again. No change.
>>
>> I also tried
>> sage: libgap.eval('F:= FreeGroup(3)')
>> That produces the same GAPError, but there was some other stuff printed
>> before the traceback which might provide a clue:
>>
>> #I gapdoc package is not available. Check that the name is correct
>> #I and it is present in one of the GAP root directories (see
>> '??RootPaths')
>> #I GAP: needed package gapdoc cannot be loaded
>> Error, failed to load needed package `gapdoc' (version >= 1.2)
>> Syntax warning: Unbound global variable in
>> /var/tmp/sage-10.9/local/share/gap/l\
>> ib/init.g:728
>> ColorPrompt( UserPreference( "UseColorPrompt" ) );
>> ^^^^^^^^^^^
>> Error, SetGasmanMessageStatus: function is not yet defined
>> Error, Variable: 'L1_IMMUTABLE_ERROR' must have a value
>> Error, Variable: 'ColorPrompt' must have a value
>>
>> I did find some other suspicious stuff:
>>
>> sage: libgap.eval('GAPInfo.RootPaths')
>> [ "/home/culler/.gap/", "\033[?1034h/var/tmp/sage-10.9/local/lib/gap/",
>> "/var/tmp/sage-10.9/local/share/gap/" ]
>>
>> The last path contains an empty pkg directory. The real pkg directory is
>> in $SAGE_ROOT/local/lib/gap. But I doubt that the second path would work
>> correctly when it has all of those ANSI escape sequences in front of it.
>> Adding a symlink /var/tmp/sage-10.9/local/share/gap/pkg ->
>> ../../lib/gap/pkg did not help. But maybe putting ANSI escape sequences in
>> a root path makes GAP crash.
>>
>> - Marc
>>
>>
>> - Marc
>>
>> On Mon, Mar 2, 2026 at 9:13 PM Dima Pasechnik <[email protected]> wrote:
>>
>>> The usual suspects for strange GAP errors are stale GAP workspaces (or
>>> related to them errors). Make sure you don't have any (typically in
>>> ~/.sage/, although your setup might have a different location of .sage/)
>>>
>>>
>>>
>>> On March 2, 2026 4:37:34 PM CST, Marc Culler <[email protected]> wrote:
>>>
>>>>
>>>>
>>>> On Monday, March 2, 2026 at 3:32:23 PM UTC-6 [email protected] wrote:
>>>>
>>>>
>>>> That's a problem with the pexpect GAP. Does
>>>>
>>>> sage: libgap.FreeGroup(3)
>>>>
>>>> work?
>>>>
>>>>
>>>> No. I don't get a RuntimeError (which I think is produced by pexpect)
>>>> but I get:
>>>>
>>>> GAPError: Error, FreeGroup: function is not yet defined
>>>>
>>>> Does
>>>>
>>>> ./sage -t src/sage/features/gap.py
>>>>
>>>> pass?
>>>>
>>>>
>>>> Yes. I get:
>>>>
>>>> Doctesting 1 file.
>>>> sage/src/bin/sage -t --warn-long 5.0
>>>> --random-seed=206062923921806203470542245493080431476
>>>> sage/src/sage/features/gap.py
>>>> [5 tests, 0.01s wall]
>>>> ----------------------------------------------------------------------
>>>> All tests passed!
>>>> ----------------------------------------------------------------------
>>>> Total time for all tests: 0.2 seconds
>>>> cpu time: 0.0 seconds
>>>> cumulative wall time: 0.0 seconds
>>>> Features detected for doctesting:
>>>>
>>>> - Marc
>>>>
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