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Failures in `readNormalProtocolConformanceXRef` are usually caused by a dependency change without the required rebuild of its dependents. Display a proper error instead of crashing when encountering such an issue during normal compilation. Recover silently when we can afford to, during indexing or in LLDB.
83 lines
2.2 KiB
Swift
83 lines
2.2 KiB
Swift
// RUN: %empty-directory(%t)
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// RUN: split-file %s %t
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/// Reference build: Build libs and client for a normal build.
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// RUN: %target-swift-frontend -emit-module %t/ChangingLib.swift -I %t \
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// RUN: -emit-module-path %t/ChangingLib.swiftmodule
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// RUN: %target-swift-frontend -emit-module %t/MiddleLib.swift -I %t \
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// RUN: -emit-module-path %t/MiddleLib.swiftmodule
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// RUN: %target-swift-frontend -typecheck %t/Client.swift -I %t
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/// Case 1: Remove a conformance from one lib, leave the other as stale and
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/// rebuild client. Error on the missing conformance.
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// RUN: %target-swift-frontend -emit-module %t/ChangingLib.swift -I %t \
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// RUN: -emit-module-path %t/ChangingLib.swiftmodule \
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// RUN: -D DROP_CONFORMANCE
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// RUN: not %target-swift-frontend -typecheck %t/Client.swift -I %t \
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// RUN: 2> %t/errors.log
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// RUN: %FileCheck %s --input-file=%t/errors.log \
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// RUN: --check-prefix CHECK-REMARK-CONFORMANCE
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/// No errors when extended recovery is enabled.
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// RUN: %target-swift-frontend -typecheck %t/Client.swift -I %t \
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// RUN: -experimental-allow-module-with-compiler-errors -verify
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//--- ChangingLib.swift
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public protocol SimpleProto {
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func successor() -> Self
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}
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#if DROP_CONFORMANCE
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// CHECK-REMARK-CONFORMANCE: MiddleLib.swiftmodule:1:1: error: Conformance of 'Counter' to 'SimpleProto' not found in referenced module 'ChangingLib'
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// CHECK-REMARK-CONFORMANCE: note: Breaks conformances of 'OneToAThousand' to 'ProtoUser'
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#else
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extension Counter: SimpleProto {}
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#endif
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public protocol ProtoUser {
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associatedtype Impl: SimpleProto
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var start: Impl { get }
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subscript(_: Impl) -> Element { get }
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}
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public struct Counter<T> {
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public var value = 0
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public init(value: Int) { self.value = value }
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public func successor() -> Counter {
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return Counter(value: value + 1)
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}
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}
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//--- MiddleLib.swift
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import ChangingLib
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// Instantiate Counter<Int>, relying on Counter's adoption of SimpleProto.
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public struct OneToAThousand : ProtoUser {
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public typealias Impl = Counter<Int>
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public var start: Impl {
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return Impl(value: 1)
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}
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public subscript(i: Impl) -> Int {
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return i.value
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}
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public init() {}
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}
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//--- Client.swift
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import MiddleLib
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var test = OneToAThousand()
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var s = test.start
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print(test[s])
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