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-rw-r--r--clang/test/SemaObjC/conflict-atomic-property.m10
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diff --git a/clang/test/SemaObjC/conflict-atomic-property.m b/clang/test/SemaObjC/conflict-atomic-property.m
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+++ b/clang/test/SemaObjC/conflict-atomic-property.m
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+// RUN: %clang_cc1 -fsyntax-only -verify %s
+// rdar://10260017
+
+@interface Foo
+@property (nonatomic, assign, atomic) float dummy; // expected-error {{property attributes 'atomic' and 'nonatomic' are mutually exclusive}}
+@property (nonatomic, assign) float d1;
+@property (atomic, assign) float d2;
+@property (assign) float d3;
+@property (atomic, nonatomic, assign) float d4; // expected-error {{property attributes 'atomic' and 'nonatomic' are mutually exclusive}}
+@end