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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