Missing evaluation for some files in the evaluation report

[WeilinHan8]

When I run fixml on some github repo, I noticed that sometimes there are missing evaluation for some files, as you can see in the attached evaluation reports.

[WeilinHan8]

eval_report_v1.3.html.pdf
eval_report_v1.4.html.pdf
eval_report_v1.5.html.pdf