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-rw-r--r--rational.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/rational.c b/rational.c
index 4bdc695dc1..742f594f65 100644
--- a/rational.c
+++ b/rational.c
@@ -2396,6 +2396,7 @@ read_rat_nos(const char **s, int sign, int strict, VALUE *num)
if (**s == '/') {
(*s)++;
if (!read_digits(s, strict, &den, NULL)) goto failed;
+ if (den == ZERO) rb_num_zerodiv();
nurat_reduce(num, &den);
if (div != ONE && den != ONE)
den = rb_int_mul(den, div);