---

yaml
---
r: 212953
b: refs/heads/master
c: 09ed27c
h: refs/heads/master
i:
  212951: dd3987d
v: v3

Author: nagisa

[refs]

@@ -1,5 +1,5 @@
 ---
-refs/heads/master: ca72d7fe3fd2134f4b6b633f625929c4d30720f9
+refs/heads/master: 09ed27c05ec8f936294ca6eba1adae35144b2460
 refs/heads/snap-stage1: e33de59e47c5076a89eadeb38f4934f58a3618a6
 refs/heads/snap-stage3: ba0e1cd8147d452c356aacb29fb87568ca26f111
 refs/heads/try: 1864973ae17213c5a58c4dd3f9af6d1b6c7d2e05

trunk/src/libsyntax/ext/base.rs

@@ -681,7 +681,6 @@ impl<'a> ExtCtxt<'a> {
     pub fn expansion_cause(&self) -> Span {
         let mut expn_id = self.backtrace;
         let mut last_macro = None;
-        let mut current_expn = None;
         loop {
             if self.codemap().with_expn_info(expn_id, |info| {
                 info.map_or(None, |i| {
@@ -690,7 +689,6 @@ impl<'a> ExtCtxt<'a> {
                         return None;
                     }
                     expn_id = i.call_site.expn_id;
-                    current_expn = Some(i.call_site);
                     if i.callee.format != CompilerExpansion {
                         last_macro = Some(i.call_site)
                     }