llvm/test/tools/llvm-ifs/read-unsupported-file.test

# RUN: not llvm-ifs --output-format=IFS --output=- %s 2>&1| FileCheck %s

This is just some text that cannot be read by llvm-ifs.

# CHECK: The file was not recognized as a valid object file
# CHECK: YAML failed reading as IFS
# CHECK: No file readers succeeded reading `{{.*}}` (unsupported/malformed file?)