File: protocol_self_concrete_error.swift

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// RUN: %target-typecheck-verify-swift
// RUN: %target-typecheck-verify-swift -disable-requirement-machine-concrete-contraction

// This triggered a Requirement Machine assertion because the permanent
// 'identity conformance' rule ([P].[P] => [P]) was the source of the
// conflict.

struct S {}

// expected-error@+2 {{same-type requirement makes generic parameter 'Self' non-generic}}
// expected-error@+1 {{no type for 'Self' can satisfy both 'Self == S' and 'Self : P'}}
protocol P where Self == S {}