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d919b45937
DeferCleanup pushes a new temporary cleanup to catch non-local returns from the defer block, so we have to use stable iterators while emitting cleanups. There's no good deterministic test case for this -- it would manifest as memory corruption if the underlying storage of the DiverseStack grew beyond the inline storage. Add a reduced version of the original user-reported test case that triggers it reliably -- I had a hard time coming up with anything simpler. Fixes <rdar://problem/21437203>. Swift SVN r29658
31 lines
470 B
Swift
31 lines
470 B
Swift
// RUN: %target-swift-frontend %s -emit-silgen
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struct Curds {
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var whey: AnyObject? = nil
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}
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private class Butter {
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private func churn<T>(block: () throws -> T) throws -> T {
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return try block()
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}
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}
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struct Cow {
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private var b : Butter
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init() {
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self.b = Butter()
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}
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func cheese() throws {
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let a = Curds()
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let b = Curds()
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let c = Curds()
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var err = 0
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var newChild = 0
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defer { }
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try self.b.churn { return () }
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}
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}
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