cdhash_cmp: can take rational literals

Rational literals are those integers suffixed with `r`.  They tend to
be a part of more complex expressions like `123/456r`, but in theory
they can live alone.  When such "bare" rational literals are passed to
case-when branch, we have to take care of them.  Fixes [Bug #17854]

1 files changed, 1 insertions, 0 deletions

diff --git a/internal/rational.h b/internal/rational.h
index e53ee7b499..6bbd2a9810 100644
--- a/internal/rational.h
+++ b/internal/rational.h
@@ -33,6 +33,7 @@ VALUE rb_rational_div(VALUE self, VALUE other);
 VALUE rb_lcm(VALUE x, VALUE y);
 VALUE rb_rational_reciprocal(VALUE x);
 VALUE rb_cstr_to_rat(const char *, int);
+VALUE rb_rational_hash(VALUE self);
 VALUE rb_rational_abs(VALUE self);
 VALUE rb_rational_cmp(VALUE self, VALUE other);
 VALUE rb_rational_pow(VALUE self, VALUE other);