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4cc41e5e64
We've been performing the "occurs" check when computing potential bindings for type variables, but we weren't actually performing the check for bindings that *must* occur. Perform the occurs check before binding type variables, which fixes a few crashers and is far more principled. Note that this obviates the need for tracking the type variables we've substituted in simplifyType(), so simplify that as well. Fixes rdar://problem/27879334 / SR-2351.
11 lines
424 B
Swift
11 lines
424 B
Swift
// This source file is part of the Swift.org open source project
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// Copyright (c) 2014 - 2016 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See http://swift.org/LICENSE.txt for license information
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// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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// RUN: not %target-swift-frontend %s -parse
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// REQUIRES: asserts
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[1,{[1,{[]
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