; RUN: not FileCheck -input-file %s %s -check-prefix=FOO -check-prefix=BAR 2>&1 | FileCheck %s
; RUN: not FileCheck -input-file %s %s -check-prefixes=FOO,BAR 2>&1 | FileCheck %s
; RUN: not FileCheck -input-file %s %s -check-prefixes=BAR,FOO 2>&1 | FileCheck %s

BAR
bar
foo
; BAR: ba{{z}}
; FOO: fo{{o}}

; CHECK: {{error: expected string not found in input}}
; CHECK-NEXT: {{B}}AR: ba{{[{][{]z[}][}]}}