Duplicate module warning error

[jesse99]

I don't have a repro for this, but it's a really annoying error because it seems to be a lie and it's not at all clear how users can fix it. I had a library depending on three other libraries. The external libraries were copied into a local project/bin directory so that I had more control over them.

This was all working fine until I decided to rename my project. As part of this process I removed my bin directory and copied new versions of the external libraries into bin. Now when I do rustc --out-dir bin -L bin -O src/rwebserve.rc I get:

src/rwebserve.rc:11:0: 11:42 error: duplicate definition of module socket
src/rwebserve.rc:11 use socket (name = "socket", vers = "0.1");

If I change the use statement to "use socketXXX" I get the same error which makes me think that it is not a duplicate definition (and I don't see how it would be). My guess is that this is caused when using libraries built by slightly different versions of rustc. Unfortunately I now get an ICE trying to build one of the libraries so I can't try it out atm (currently building a new rustc in the hopes that that will fix the ICE).

[jesse99]

Finally fixed this. I thought that if you had a foo.rc file you could have a foo.rs which would automatically get compiled in and allow you to put the foo.rs items in the project namespace. When I did my renaming I changed things around to use that pattern, but that seemed to be the cause of my duplicate module error.

After renaming rwebserve.rs to server.rs and adding mod sever; to my rc file I can now build again.

[pcwalton]

Closing this.

[jesse99]

I don't think that this should be closed:

1. Using an rs file with the same name as the rc file does work, at least in simple cases.
2. Given that why didn't my case work? A quick perusal of the ref manual and the tutorial wasn't helpful.
3. If my case is expected not to work a better error message than "duplicate modue" would be really really helpful.