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-rw-r--r--rational.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/rational.c b/rational.c
index c035a1a..be1c9d1 100644
--- a/rational.c
+++ b/rational.c
@@ -584,6 +584,8 @@ f_rational_new_no_reduce2(VALUE klass, VALUE x, VALUE y)
*
* Rational(1, 2) #=> (1/2)
* Rational('1/2') #=> (1/2)
+ * Rational(nil) #=> TypeError
+ * Rational(1, nil) #=> TypeError
*
* Syntax of string form:
*