---

yaml
---
r: 21191
b: refs/heads/snap-stage3
c: 09cf5c1
h: refs/heads/master
i:
  21189: 1951592
  21187: ff4623b
  21183: 5d0f1d1
v: v3

Author: bblum

[refs]

@@ -1,7 +1,7 @@
 ---
 refs/heads/master: e430a699f2c60890d9b86069fd0c68a70ece7120
 refs/heads/snap-stage1: e33de59e47c5076a89eadeb38f4934f58a3618a6
-refs/heads/snap-stage3: 5026ea044650baeb6a1f61f2eca89e3510ae82dd
+refs/heads/snap-stage3: 09cf5c1de412d55ac0f082e1dd5b6e52140d3486
 refs/heads/try: ffbe0e0e00374358b789b0037bcb3a577cd218be
 refs/tags/release-0.1: 1f5c5126e96c79d22cb7862f75304136e204f105
 refs/heads/ndm: f3868061cd7988080c30d6d5bf352a5a5fe2460b

branches/snap-stage3/src/rustc/middle/typeck/check/alt.rs

@@ -235,7 +235,10 @@ fn check_pat(pcx: pat_ctxt, pat: @ast::pat, expected: ty::t) {
       ast::pat_struct(path, fields, etc) => {
         // Grab the class data that we care about.
         let class_fields, class_id, substitutions;
-        match structure_of(fcx, pat.span, expected) {
+        // FIXME(#3217) If this were "match structure_of...", this bug causes
+        // it to not live long enough for 'substitutions'.
+        let structure = structure_of(fcx, pat.span, expected);
+        match structure {
             ty::ty_class(cid, ref substs) => {
                 class_id = cid;
                 substitutions = substs;