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RUN: printf '\201rforpl\377' > %t
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RUN: not llvm-profdata show %t 2>&1 | FileCheck %s
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RUN: printf '\377lprofr\201' > %t
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RUN: not llvm-profdata show %t 2>&1 | FileCheck %s
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CHECK: error: {{.+}}: Invalid instrumentation profile data (file header is corrupt)
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