* time.c (rb_time_unmagnify_to_float): Avoid double rounding.

  Reported by Tsuyoshi Sawada.
  https://bugs.ruby-lang.org/issues/10135#note-1



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47289 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 4 insertions, 1 deletions

diff --git a/time.c b/time.c
index 7ba83bbea7..6248a74442 100644
--- a/time.c
+++ b/time.c
@@ -697,7 +697,10 @@ rb_time_unmagnify_to_float(wideval_t w)
     }
 #endif
     v = w2v(w);
-    return quo(v, DBL2NUM(TIME_SCALE));
+    if (RB_TYPE_P(v, T_RATIONAL))
+        return rb_Float(quo(v, INT2FIX(TIME_SCALE)));
+    else
+        return quo(v, DBL2NUM(TIME_SCALE));
 }
 
 static void