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Work around #3215/#3217 use-after-free in typeck::check::alt

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Ben Blum
2012-08-17 15:06:46 -04:00
parent 5026ea0446
commit 09cf5c1de4
1 changed files with 4 additions and 1 deletions
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5
src/rustc/middle/typeck/check/alt.rs
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@@ -235,7 +235,10 @@ fn check_pat(pcx: pat_ctxt, pat: @ast::pat, expected: ty::t) {
ast::pat_struct(path, fields, etc) => { ast::pat_struct(path, fields, etc) => {
// Grab the class data that we care about. // Grab the class data that we care about.
let class_fields, class_id, substitutions; 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) => { ty::ty_class(cid, ref substs) => {
class_id = cid; class_id = cid;
substitutions = substs; substitutions = substs;