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							// RUN: %clang_cc1 -std=c++2a %s -verify
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							auto L0 = []<> { }; //expected-error {{cannot be empty}}
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							 | 
							
							
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							auto L1 = []<typename T1, typename T2> { };
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							auto L2 = []<typename T1, typename T2>(T1 arg1, T2 arg2) -> T1 { };
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							auto L3 = []<typename T>(auto arg) { T t; };
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							auto L4 = []<int I>() { };
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