it is not libgap, it is pexpect GAP that is used here - something we should
get rid of.
On Fri, 14 Aug 2020, 23:39 'Peter Mueller' via sage-support, <
sage-support@googlegroups.com> wrote:
> The following code yields a Traceback for no (to me) obvious reason. The
> same happens on sagecell too. It seems to be a minimal case. For instance
> removing the line "P = ..." or having less deeply nested loops does not
> display this problem:
>
> for A in PrimitiveGroups(3):
> for G in A.normal_subgroups():
> for U in G.conjugacy_classes_subgroups():
> P = U.trivial_character()
> for x in G.conjugacy_classes_subgroups():
> for y in x.conjugacy_classes_subgroups():
> pass
>
> GAPError Traceback (most recent call last)
> <ipython-input-1-c79c371f18a8> in <module>()
> ----> 1 load('./bug2.sage')
>
> /home/mueller/local/sage-9.1/local/lib/python3.7/site-packages/sage/misc/persist.pyx
> in sage.misc.persist.load (build/cythonized/sage/misc/persist.c:2538)()
> 142
> 143 if sage.repl.load.is_loadable_filename(filename):
> --> 144 sage.repl.load.load(filename, globals())
> 145 return
> 146
> [.................. SNIP .....................]
> > 2514 sig_on()
> 2515 if n == 0:
> 2516 result = CALL_0ARGS(self.value)
>
> GAPError: Error, usage: FreeGroup(<name1>,<name2>..) or FreeGroup(<rank>)
>
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