llvm/llvm/test/tools/llvm-ifs/conflict-header-version.ifs

# RUN: not llvm-ifs --input-format=IFS --output-ifs - %s %S/object.ifs 2>&1 | \
# RUN: FileCheck %s --check-prefixes=CHECK-IFS

# RUN: not llvm-ifs --input-format=IFS --output-ifs - %s 2>&1 | \
# RUN: FileCheck %s --check-prefixes=CHECK-IFS2

# CHECK-IFS: error: Interface Stub: IfsVersion Mismatch.
# CHECK-IFS2: error: Interface Stub: Bad IfsVersion: 0.0, llvm-ifs supported version: 3.0.

--- !ifs-v1
IfsVersion:      0.0
Target:          x86_64-unknown-linux-gnu
Symbols:
  - { Name: a, Type: Func }
...