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compiler_opt/tools/merge_best_trajectory.py

diff --git a/compiler_opt/tools/merge_best_trajectory.py b/compiler_opt/tools/merge_best_trajectory.py
index 7a8e477..95d38ec 100644
--- a/compiler_opt/tools/merge_best_trajectory.py
+++ b/compiler_opt/tools/merge_best_trajectory.py
@@ -48,6 +48,7 @@
     logging.info('merging repo: %s', path)
     tmp = best_trajectory.BestTrajectoryRepo(action_name='')
     # The json file is broken sometimes.
+    # Open issue: https://github.com/google/ml-compiler-opt/issues/163
     try:
       tmp.load_from_json_file(path)
       merged_best_trajectory_repo.combine_with_other_repo(tmp)