---

yaml
---
r: 29899
b: refs/heads/incoming
c: 09cf5c1
h: refs/heads/master
i:
  29897: b6afc6a
  29895: 86212b0
v: v3

Author: bblum

[refs]

@@ -6,7 +6,7 @@ refs/heads/try: d324a424d8f84b1eb049b12cf34182bda91b0024
 refs/tags/release-0.1: 1f5c5126e96c79d22cb7862f75304136e204f105
 refs/heads/ndm: f3868061cd7988080c30d6d5bf352a5a5fe2460b
 refs/heads/try2: d0c6ce338884ee21843f4b40bf6bf18d222ce5df
-refs/heads/incoming: 5026ea044650baeb6a1f61f2eca89e3510ae82dd
+refs/heads/incoming: 09cf5c1de412d55ac0f082e1dd5b6e52140d3486
 refs/heads/dist-snap: 2f32a1581f522e524009138b33b1c7049ced668d
 refs/tags/release-0.2: c870d2dffb391e14efb05aa27898f1f6333a9596
 refs/tags/release-0.3: b5f0d0f648d9a6153664837026ba1be43d3e2503

branches/incoming/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;