---

yaml
---
r: 51175
b: refs/heads/try
c: fb5f020
h: refs/heads/master
i:
  51173: 35fdd0a
  51171: d99bc78
  51167: 356ad95
v: v3

Author: bors

[refs]

@@ -2,7 +2,7 @@
 refs/heads/master: 5f13e9ccc2e3328d4cd8ca49f84e6840dd998346
 refs/heads/snap-stage1: e33de59e47c5076a89eadeb38f4934f58a3618a6
 refs/heads/snap-stage3: f7a2371c176663d59062ec5158f39faecba45768
-refs/heads/try: 4c58903454f5409c4b0cb2060ce869021dbf46c2
+refs/heads/try: fb5f020cc2d1d0972d2726413d1ec053990675ad
 refs/tags/release-0.1: 1f5c5126e96c79d22cb7862f75304136e204f105
 refs/heads/ndm: f3868061cd7988080c30d6d5bf352a5a5fe2460b
 refs/heads/try2: 147ecfdd8221e4a4d4e090486829a06da1e0ca3c

branches/try/RELEASES.txt

@@ -30,7 +30,7 @@ Version 0.6 (April 2013)
         `@mut T`, `core::mut` or `core::cell`
       * `extern mod { ... }` is no longer valid syntax for foreign
         function modules. Use extern blocks: `extern { ... }`
-      * Newtype enums removed. Use tuple-structs.
+      * Newtype enums removed. Used tuple-structs.
       * Trait implementations no longer support visibility modifiers
       * Pattern matching over vectors improved and expanded
       * `const` renamed to `static` to correspond to lifetime name,
@@ -40,10 +40,6 @@ Version 0.6 (April 2013)
         `#[deriving(Clone)]`
       * Casts to traits must use a pointer sigil, e.g. `@foo as @Bar`
         instead of `foo as Bar`.
-      * Fixed length vector types are now written as `[int, .. 3]`
-        instead of `[int * 3]`.
-      * Fixed length vector types can express the length as a constant
-        expression. (ex: `[int, .. GL_BUFFER_SIZE - 2]`)
 
    * Semantic changes
       * Types with owned pointers or custom destructors move by default,

branches/try/src/libcore/str.rs

@@ -1865,8 +1865,10 @@ pub struct CharRange {
  * Given a byte position and a str, return the previous char and its position
  *
  * This function can be used to iterate over a unicode string in reverse.
+ *
+ * returns 0 for next index if called on start index 0
  */
-fn char_range_at_reverse(ss: &str, start: uint) -> CharRange {
+pub fn char_range_at_reverse(ss: &str, start: uint) -> CharRange {
     let mut prev = start;
 
     // while there is a previous byte == 10......
@@ -1875,7 +1877,12 @@ fn char_range_at_reverse(ss: &str, start: uint) -> CharRange {
     }
 
     // now refer to the initial byte of previous char
-    prev -= 1u;
+    if prev > 0u {
+        prev -= 1u;
+    } else {
+        prev = 0u;
+    }
+
 
     let ch = char_at(ss, prev);
     return CharRange {ch:ch, next:prev};
@@ -3761,4 +3768,10 @@ mod tests {
         "12345555".cmp(& &"123456") == Less;
         "22".cmp(& &"1234") == Greater;
     }
+
+    #[test]
+    fn test_char_range_at_reverse_underflow() {
+        assert!(char_range_at_reverse("abc", 0).next == 0);
+    }
+
 }