Rendering error with empty log

[disktnk]

If the target result directory has empty log file (simply make $touch example_results/test2/log), show nothing on web front.

Example of directory tree.

16:59 $ tree example_results/
example_results/
├── result1
│   └── log
├── result2
│   └── log
└── test2
    └── log  # empty file