Avoid GC problem in Cyclotomic

DIFF can cause a GC, which might move ResultCyc
gap-system · Mar 28, 2018 · ad6d758 · ad6d758
1 parent b9b24ad
commit ad6d758
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/src/cyclotom.c b/src/cyclotom.c
@@ -688,7 +688,9 @@ Obj             Cyclotomic (
             res[0] = cof;
         else {
             CHANGED_BAG( ResultCyc );
-            res[0] = DIFF( INTOBJ_INT(0), cof );
+            Obj negcof = DIFF( INTOBJ_INT(0), cof );
+            res = BASE_PTR_PLIST(ResultCyc);
+            res[0] = negcof;
         }
         n = 1;
     }