|  | ; RUN: not llvm-as < %s 2>&1 | FileCheck %s
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							|  | ; Check that !tbaa upgrade doesn't crash on undefined metadata (it should give
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							|  | ; an error).
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							|  | 
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							|  | define void @foo() {
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							|  | entry:
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							|  |   store i8 undef, i8* undef,
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							|  | ; CHECK: :[[@LINE+1]]:10: error: use of undefined metadata '!1'
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							|  |   !tbaa !1
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							|  |   unreachable
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							|  | }
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