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fb3944f1b1
When deserialization a protocol conformance from a binary swiftmodule file the compiler can encounter inconsistencies caused by stale module files. Replace the hard crash with a proper error and print the list of requirements and conformances being compared to stderr for manual inspection. Recover silently when we can afford to, during indexing or in LLDB.
118 lines
3.9 KiB
Swift
118 lines
3.9 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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/// Case 2: Remove a requirement from one lib, leave the other as stale and
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/// rebuild client. Error on the mismatch.
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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_REQUIREMENT
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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-REQUIREMENT
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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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/// Combined case: Remove both the conformance and the requirement.
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/// Fail on the removed conformance only as it was first.
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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 -D DROP_REQUIREMENT
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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-prefixes CHECK-REMARK-CONFORMANCE
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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 Element
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#if DROP_REQUIREMENT
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// CHECK-REMARK-REQUIREMENT: MiddleLib.swiftmodule:1:1: error: Conformances of 'OneToAThousand' do not match requirement signature of 'ProtoUser'; 5 conformances for 6 requirements
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// CHECK-REMARK-REQUIREMENT: Requirements:
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// Skipping implicits.
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// CHECK-REMARK-REQUIREMENT: Conformances:
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// Skipping implicits.
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// CHECK-REMARK-REQUIREMENT: (specialized_conformance type="OneToAThousand.Impl" protocol="SimpleProto"
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// CHECK-REMARK-REQUIREMENT: (normal_conformance type="Counter<T>" protocol="SimpleProto" lazy))
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associatedtype Impl
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#else
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associatedtype Impl: SimpleProto
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#endif
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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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