gmpints: fix Log2Int regression

gap-system · Jan 11, 2017 · 34e30fb · 34e30fb
1 parent 814ec4d
commit 34e30fb
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/src/gmpints.c b/src/gmpints.c
@@ -685,6 +685,7 @@ static Int CLog2UInt(UInt a)
 
 Int CLog2Int(Int a)
 {
+ if (a == 0) return -1;
  if (a < 0) a = -a;
  return CLog2UInt(a);
 }