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incr.comp.: Don't filter out StmtDecls from hir::Block during hashing as these make a difference for the RegionScopeTree.

This commit is contained in:
Michael Woerister 2017-11-07 15:18:00 +01:00
parent faad4ea3b7
commit 81fd279e81
1 changed files with 1 additions and 27 deletions
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28
src/librustc/ich/impls_hir.rs
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@ -356,33 +356,7 @@ impl<'gcx> HashStable<StableHashingContext<'gcx>> for hir::Block {
targeted_by_break,
} = *self;
let non_item_stmts = || stmts.iter().filter(|stmt| {
match stmt.node {
hir::StmtDecl(ref decl, _) => {
match decl.node {
// If this is a declaration of a nested item, we don't
// want to leave any trace of it in the hash value, not
// even that it exists. Otherwise changing the position
// of nested items would invalidate the containing item
// even though that does not constitute a semantic
// change.
hir::DeclItem(_) => false,
hir::DeclLocal(_) => true
}
}
hir::StmtExpr(..) |
hir::StmtSemi(..) => true
}
});
let count = non_item_stmts().count();
count.hash_stable(hcx, hasher);
for stmt in non_item_stmts() {
stmt.hash_stable(hcx, hasher);
}
stmts.hash_stable(hcx, hasher);
expr.hash_stable(hcx, hasher);
rules.hash_stable(hcx, hasher);
span.hash_stable(hcx, hasher);