REBASE: Ensure cached GL niceo is defined on full GL.

gap-system · Sep 6, 2018 · e7778cc · e7778cc
1 parent 7bc15df
commit e7778cc
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/lib/grpffmat.gi b/lib/grpffmat.gi
@@ -138,9 +138,13 @@ InstallGlobalFunction( NicomorphismFFMatGroupOnFullSpace, function( grp )
     nice:=First(FULLGLNICOCACHE,x->x[1]=V and x[2]=dim);
     if nice<>fail then return nice[3];fi;
 
+    if not (HasIsNaturalGL(grp) and IsNaturalGL(grp)) then
+      grp:=GL(dim,field); # enforce map on full GL
+    fi;
     V     := field ^ dim;
     xset := ExternalSet( grp, V );
 
+
     # STILL: reverse the base to get point sorting compatible with lexicographic
     # vector arrangement
     SetBaseOfGroup( xset, One( grp ));