Why does my rdebug session say "*** No sourcefile available"

Question

I'm not sure what the pattern of behaviour is but some programs - notably simple rack.ru based ones running in thin - can't easily be debugged. When a breakpoint is tripped, no source is available

Note this isn't the same as this other S.O. [issue][1]

[1]: http://stackoverflow.com/questions/323010/in-ruby-why-does-my-irb-interactive-debugging- session-always-say-no-sourcefile

Answer 1

err, actually found the source of the problem. I had a Dir.chdir buried in my code. Any debugger call after that couldn't find the source, a call before worked fine.

Hopefully that helps somebody at some time.