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Previously this wasn't possible because of `one-way` bind constraints involved in pattern inference but this no longer the case.
13 lines
703 B
Swift
13 lines
703 B
Swift
// RUN: %target-typecheck-verify-swift
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// rdar://107651291 – Make sure we don't crash
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func foo(xs: [String: [String]], ys: [String: [String]]) {
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for (key, value) in xs {
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guard let ys = ys.first(where: { $0.key == key }) else { return }
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for (a, b) in zip(xs, ys) {}
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// expected-error@-1 {{type 'Dictionary<String, [String]>.Element' (aka '(key: String, value: Array<String>)') cannot conform to 'Sequence'}}
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// expected-note@-2 {{only concrete types such as structs, enums and classes can conform to protocols}}
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// expected-note@-3 {{required by global function 'zip' where 'Sequence2' = 'Dictionary<String, [String]>.Element' (aka '(key: String, value: Array<String>)')}}
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}
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}
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