1; RUN: %ProtectFileCheckOutput not FileCheck --allow-unused-prefixes=false --check-prefixes=P1,P2 --input-file %S/Inputs/one-check.txt %S/Inputs/one-check.txt 2>&1 | FileCheck --check-prefix=MISSING-ONE %s 2; RUN: %ProtectFileCheckOutput not FileCheck --allow-unused-prefixes=false --check-prefixes=P1,P2,P3 --input-file %S/Inputs/one-check.txt %S/Inputs/one-check.txt 2>&1 | FileCheck --check-prefix=MISSING-MORE %s 3; RUN: FileCheck --allow-unused-prefixes=true --check-prefixes=P1,P2 --input-file %S/Inputs/one-check.txt %S/Inputs/one-check.txt 4 5;; Note: the default will be changed to 'false', at which time this run line 6;; should be changed accordingly. 7; RUN: FileCheck --check-prefixes=P1,P2 --input-file %S/Inputs/one-check.txt %S/Inputs/one-check.txt 8 9; MISSING-ONE: error: no check strings found with prefix 'P2:' 10; MISSING-MORE: error: no check strings found with prefixes 'P2:', 'P3:' 11