1; RUN: not FileCheck -input-file %s %s -check-prefix=FOO -check-prefix=BAR 2>&1 | FileCheck %s
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3BAR
4bar
5foo
6; BAR: ba{{z}}
7; FOO: fo{{o}}
8
9; CHECK: {{error: expected string not found in input}}
10; CHECK-NEXT: {{B}}AR: ba{{[{][{]z[}][}]}}
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