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dataflow: fix flow of information through pattern variants

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Niko Matsakis 2013-04-30 14:07:26 -04:00
parent a896440ca1
commit aa48a170d5
1 changed files with 1 additions and 2 deletions
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3
src/librustc/middle/dataflow.rs
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@ -846,10 +846,9 @@ impl<'self, O:DataFlowOperator> PropagationContext<'self, O> {
// alternatives, so we must treat this like an N-way select
// statement.
let initial_state = reslice(in_out).to_vec();
self.reset(in_out);
for pats.each |&pat| {
let mut temp = copy initial_state;
self.walk_pat(pat, in_out, loop_scopes);
self.walk_pat(pat, temp, loop_scopes);
join_bits(&self.dfcx.oper, temp, in_out);
}
}