---

yaml
---
r: 161660
b: refs/heads/snap-stage3
c: fec0f16
h: refs/heads/master
v: v3

Author: barosl

[refs]

@@ -1,7 +1,7 @@
 ---
 refs/heads/master: 4eb72d268f337a8f117c86a2ac1b98336cab9e9d
 refs/heads/snap-stage1: e33de59e47c5076a89eadeb38f4934f58a3618a6
-refs/heads/snap-stage3: f102123b659911dbee25bbe518d73d66185bb978
+refs/heads/snap-stage3: fec0f16c98ab066ff11be35b5a8bb0d80efa90f1
 refs/heads/try: 0f0d21c1eb5c7be04d323e0b06faf252ad790af6
 refs/tags/release-0.1: 1f5c5126e96c79d22cb7862f75304136e204f105
 refs/heads/dist-snap: ba4081a5a8573875fed17545846f6f6902c8ba8d

branches/snap-stage3/src/libserialize/json.rs

@@ -386,7 +386,8 @@ fn spaces(wr: &mut io::Writer, mut n: uint) -> Result<(), io::IoError> {
 fn fmt_number_or_null(v: f64) -> string::String {
     match v.classify() {
         FPNaN | FPInfinite => string::String::from_str("null"),
-        _ => f64::to_str_digits(v, 6u)
+        _ if v.fract() != 0f64 => f64::to_str_digits(v, 6u),
+        _ => f64::to_str_digits(v, 6u) + ".0",
     }
 }
 
@@ -2504,8 +2505,8 @@ mod tests {
 
     #[test]
     fn test_write_f64() {
-        assert_eq!(F64(3.0).to_string().into_string(), "3");
-        assert_eq!(F64(3.0).to_pretty_str().into_string(), "3");
+        assert_eq!(F64(3.0).to_string().into_string(), "3.0");
+        assert_eq!(F64(3.0).to_pretty_str().into_string(), "3.0");
 
         assert_eq!(F64(3.1).to_string().into_string(), "3.1");
         assert_eq!(F64(3.1).to_pretty_str().into_string(), "3.1");