Crash when running IsIsomorphicPGroup

[fingolfin]

Here is a (related?) problem with PqEpimorphism:

gap> K:=PcGroupCode(55511293340168776936829128265381835987500000512000655361677721943598263308118596352,1953125);
<pc group of size 1953125 with 9 generators>
gap> T:=PcGroupCode(2000005120000131078710886571799131644676937728,1953125);
<pc group of size 1953125 with 9 generators>
gap> IsIsomorphicPGroup(K,T);
#I  Evaluation in compute_degree may cause integer overflow
Error, pq program terminated, with error condition:
  Evaluation in compute_degree may cause integer overflow
 at /daten/gap-4.10.0/pkg/anupq-3.2/lib/anupqios.gi:484 called from
FILTER_PQ_STREAM_UNTIL_PROMPT( datarec ); at /daten/gap-4.10.0/pkg/anupq-3.2/lib/anupqios.gi:630 called from
ToPQ( datarec, [ 0 ], [ "  #do not ", comment ] ); at /daten/gap-4.10.0/pkg/anupq-3.2/lib/anupqios.gi:658 called from
ToPQ_BOOL( datarec, VALUE_PQ_OPTION( "PcgsAutomorphisms", false, datarec ), "compute pcgs gen. seq. for auts." ); at /daten/gap-4.10.0/pkg/anupq-3.2/lib/anupqi.gi:2439 called from
PQ_SP_STANDARD_PRESENTATION( datarec ); at /daten/gap-4.10.0/pkg/anupq-3.2/lib/anusp.gi:197 called from
PQ_EPIMORPHISM_STANDARD_PRESENTATION( arg ) at /daten/gap-4.10.0/pkg/anupq-3.2/lib/anusp.gi:253 called from
...  at *stdin*:19
you can 'quit;' to quit to outer loop, or
you can 'return;' to continue
brk>

Once I also got the following error message, but I cannot reproduce this:

gap> IsIsomorphicPGroup(K,T);
Error, PrintTo: cannot open '/var/folders/bz/2vgplf091k76j_fyhl3g2s05gwbdyt/T//tmAcQbUl/GAP_library' for output in
  CallFuncList( PRINT_TO, arg ); at /daten/gap-4.10.0/lib/streams.gd:1044 called from
PrintTo( ANUPQData.SPimages, "" ); at /daten/gap-4.10.0/pkg/anupq-3.2/lib/anupqios.gi:25 called from
PQ_START( VALUE_PQ_OPTION( "PqWorkspace", 10000000 ), VALUE_PQ_OPTION( "SetupFile" ) ) at /daten/gap-4.10.0/pkg/anupq-3.2/lib/anupqios.gi:824 called from
ANUPQ_ARG_CHK( "StandardPresentation", args ) at /daten/gap-4.10.0/pkg/anupq-3.2/lib/anusp.gi:137 called from
PQ_EPIMORPHISM_STANDARD_PRESENTATION( arg ) at /daten/gap-4.10.0/pkg/anupq-3.2/lib/anusp.gi:253 called from
PqStandardPresentation( PqFpGroupPcGroup( G ) ) at /daten/gap-4.10.0/pkg/anupq-3.2/lib/anusp.gi:343 called from
...  at *stdin*:4
#I  Options stack has been reset

Originally posted by @heikodietrich in #21 (comment)

Update: edited to use code blocks