[erlang-questions] WTF?

[Mike Oxford]

Application tree was working...has been for weeks.

Ran rebar and it crashed, shit all over my nodes (again.)  No problem,
been there done that, fix it up...

Now when I run it (after rebar's generate) it gives me the "undef
start/2" error.

Spend hours trying to figure out everything from how my lib_dirs got
changed, env, everything, full cleans, everything.

Pull a backup ... it works.
Hand merge all new changes... works, runs fine.
Nuke the directory and copy the backup into the directory....undef start/2.
Copy the entire tree to another directory ... runs fine.

What/where/WTF has been corrupted that running it from a specific
directory would cause issues?

/opt/name/proj <-- undef start/2, used to work
/opt/name/wtf/proj <-- works

My lib_dirs have not changed, binary cp -r between the two directories
so they're identical.

Rebar may have caused it, but now that it's in this completely f'd up
state I need to figure out how to get it OUT of this state, since
rebar's just a packaging system in front of erlexec.

So ... two identical directory structures, one works and one does not.

Again, it's been working for weeks .. this is not a fundamental issue
but more "state."

I have -not- rebooted.  I want to understand this fully before I push
in into production.

Anyone know of a good place to start digging?

TIA.

-mox