Failure to analyze Java sources with unicode in their names

[stuhood]

An attempt to extract the dependencies of https://github.com/playframework/playframework/blob/ff320c4ed59d21a36a94410f20bb2ebb311c3b4d/dev-mode/sbt-plugin/src/sbt-test/play-sbt-plugin/routes-compiler-injected-routes-compilation-with-request-passed/app/controllers/%CF%80%C3%B8$7%C3%9F.java results in an error like:

pants.engine.process.ProcessExecutionFailure: Process 'Java source dependency analysis failed.' failed with exit code 899.
stdout:

stderr:
java.io.FileNotFoundException: __source_to_analyze/dev-mode/sbt-plugin/src/sbt-test/play-sbt-plugin/routes-compiler-injected-routes-compilation-with-request-passed/app/controllers/????$7??.java (No such file or directory)