diff options
Diffstat (limited to 'src/floatfns.c')
| -rw-r--r-- | src/floatfns.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/src/floatfns.c b/src/floatfns.c index 529e7b76e39..cbcc0bfe520 100644 --- a/src/floatfns.c +++ b/src/floatfns.c @@ -460,7 +460,8 @@ DEFUN ("expt", Fexpt, Sexpt, 2, 2, 0, CHECK_NUMBER_OR_FLOAT (arg1); CHECK_NUMBER_OR_FLOAT (arg2); if (INTEGERP (arg1) /* common lisp spec */ - && INTEGERP (arg2)) /* don't promote, if both are ints */ + && INTEGERP (arg2) /* don't promote, if both are ints, and */ + && 0 <= XINT (arg2)) /* we are not computing the -ARG2 root */ { /* this can be improved by pre-calculating */ EMACS_INT acc, x, y; /* some binary powers of x then accumulating */ Lisp_Object val; |