[Mlir-commits] [mlir] [MLIR][TableGen] Make optional enum parser not consume the token when it is not matched (PR #188008)

[LLVM Continuous Integration]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `ppc64le-mlir-rhel-clang` running on `ppc64le-mlir-rhel-test` while building `mlir` at step 6 "test-build-check-mlir-build-only-check-mlir".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/129/builds/41209

<details>
<summary>Here is the relevant piece of the build log for the reference</summary>

```
Step 6 (test-build-check-mlir-build-only-check-mlir) failure: 1200 seconds without output running [b'ninja', b'check-mlir'], attempting to kill
...
PASS: MLIR-Unit :: IR/./MLIRIRTests/102/142 (3973 of 3983)
PASS: MLIR :: mlir-runner/utils.mlir (3974 of 3983)
PASS: MLIR-Unit :: IR/./MLIRIRTests/0/142 (3975 of 3983)
PASS: MLIR-Unit :: Interfaces/./MLIRInterfacesTests/12/25 (3976 of 3983)
PASS: MLIR-Unit :: IR/./MLIRIRTests/38/142 (3977 of 3983)
PASS: MLIR-Unit :: Interfaces/./MLIRInterfacesTests/11/25 (3978 of 3983)
PASS: MLIR-Unit :: Interfaces/./MLIRInterfacesTests/13/25 (3979 of 3983)
PASS: MLIR-Unit :: Pass/./MLIRPassTests/11/14 (3980 of 3983)
PASS: MLIR-Unit :: IR/./MLIRIRTests/37/142 (3981 of 3983)
PASS: MLIR :: mlir-reduce/dce-test.mlir (3982 of 3983)
command timed out: 1200 seconds without output running [b'ninja', b'check-mlir'], attempting to kill
process killed by signal 9
program finished with exit code -1
elapsedTime=3817.303663

```

</details>

https://github.com/llvm/llvm-project/pull/188008