FIXME(#19497) -- Stop messing around and just give rustc 32MB of stack unconditionally. This is prompted by some sort of bug in trans that causes a stack overflow when the modules in trans are made private. (In particular, the overflow can also be avoided by making controlflow and callee public, but that seems strictly worse than just using more stack.)

src/librustc_driver/lib.rs

@@ -470,13 +470,7 @@ pub fn list_metadata(sess: &Session, path: &Path,
 /// The diagnostic emitter yielded to the procedure should be used for reporting
 /// errors of the compiler.
 pub fn monitor(f: proc():Send) {
-    // FIXME: This is a hack for newsched since it doesn't support split stacks.
-    // rustc needs a lot of stack! When optimizations are disabled, it needs
-    // even *more* stack than usual as well.
-    #[cfg(rtopt)]
-    static STACK_SIZE: uint = 6000000;  // 6MB
-    #[cfg(not(rtopt))]
-    static STACK_SIZE: uint = 20000000; // 20MB
+    static STACK_SIZE: uint = 32000000; // 32MB
 
     let (tx, rx) = channel();
     let w = io::ChanWriter::new(tx);