rustc fails in the linker when compiling foo.rs with a sibling directory called foo

[huonw]

$ echo 'fn main() {}' > foo.rs
$ mkdir foo
$ rustc foo.rs
error: linking with `cc` failed: exit code: 1
note: cc arguments: '-m64' '-L/usr/local/lib/rustlib/x86_64-unknown-linux-gnu/lib' '-o' 'foo' 'foo.o' '-lmorestack' '-nodefaultlibs' '-Wl,--as-needed' '/usr/local/lib/rustlib/x86_64-unknown-linux-gnu/lib/libgreen-2892ff35-0.10-pre.rlib' '/usr/local/lib/rustlib/x86_64-unknown-linux-gnu/lib/librand-413a5926-0.10-pre.rlib' '/usr/local/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustuv-0d450bab-0.10-pre.rlib' '/usr/local/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-31b43f22-0.10-pre.rlib' '-L/home/huon/tmp/.rust' '-L/home/huon/tmp' '-L/home/huon/.rust' '-lpthread' '-lrt' '-lc' '-ldl' '-lm' '-lpthread' '-lgcc_s' '-Wl,-rpath,$ORIGIN/../../../usr/local/lib/rustlib/x86_64-unknown-linux-gnu/lib' '-Wl,-rpath,/usr/local/lib/rustlib/x86_64-unknown-linux-gnu/lib' '-lcompiler-rt'
note: /usr/bin/ld: cannot open output file foo: Is a directory
collect2: error: ld returned 1 exit status

error: aborting due to previous error

[pnkfelix]

I assume the desired behavior here is that we should check well ahead of time if any file/directory already exists at the path for the output build product, and fail with an error then instead of waiting until we get this far into it?

[huonw]

That would make the error messages nicer, yes.

[steveklabnik]

Triage: same today.

[steveklabnik]

Triage: no change.