rustc vs permissions

[jesse99]

So I have a library where make essentialy does mkdir bin 2> /dev/null && rustc --out-dir bin -O src/rparse.rc. If I start with an empty bin directory and do something lame like sudo make followed by make I get a half-way reasonable error message on Mac:

error: linking with cc failed with code 1
note: cc arguments: -L/usr/local/lib/rustc/x86_64-apple-darwin/lib -m64 -o bin/librparse-613e24f4d58a7a16-0.3.dylib bin/rparse.o -L/usr/local/lib/rustc/x86_64-apple-darwin/lib -lcore-d27e4777a53c3e50-0.2 -L/usr/local/lib/rustc/x86_64-apple-darwin/lib -lstd-d399da1ab6f5bec0-0.2 -dynamiclib -Wl,-install_name,@rpath/librparse-613e24f4d58a7a16-0.3.dylib -lrustrt -Wl,-no_compact_unwind -lmorestack -Wl,-rpath,@executable_path/../../../../../../usr/local/lib/rustc/x86_64-apple-darwin/lib -Wl,-rpath,/usr/local/lib/rustc/x86_64-apple-darwin/lib
note: ld: can't write output file: bin/librparse-613e24f4d58a7a16-0.3.dylib for architecture x86_64
collect2: ld returned 1 exit status

error: aborting due to previous errors
rust: upcall fail 'explicit failure', src/librustsyntax/diagnostic.rs:77
rust: upcall fail 'explicit failure', src/rustc/driver/rustc.rs:232
rust: domain main @0x7f8774000010 root task failed
make: *** [lib] Error 101

But if I start with no bin directory and do the same thing I get the highly unhelpful:

Assertion failed: (FD >= 0 && "File not yet open!"), function preferred_buffer_size, file /Users/jessejones/Source/Third_Party/rust/src/llvm/lib/Support/raw_ostream.cpp, line 590.
make: *** [lib] Illegal instruction: 4

(which I originally thought was an ICE).

[pcwalton]

This is really an LLVM bug, but there's probably a way to work around it.

[graydon]

This gives a nice error message as of #2910, so closing.