Remove windows TCB hack from rustdoc

src/librustdoc/lib.rs

@@ -89,47 +89,7 @@ pub mod html {
 type Output = (clean::Crate, Vec<plugins::PluginJson> );
 
 pub fn main() {
-    // Why run rustdoc in a separate task? That's a good question!
-    //
-    // We first begin our adventure at the ancient commit of e7c4fb69. In this
-    // commit it was discovered that the stack limit frobbing on windows ended
-    // up causing some syscalls to fail. This was worked around manually in the
-    // relevant location.
-    //
-    // Our journey now continues with #13259 where it was discovered that this
-    // stack limit frobbing has the ability to affect nearly any syscall. Note
-    // that the key idea here is that there is currently no knowledge as to why
-    // this is happening or how to preserve it, fun times!
-    //
-    // Now we continue along to #16275 where it was discovered that --test on
-    // windows didn't work at all! Yet curiously rustdoc worked without --test.
-    // The exact reason that #16275 cropped up is that during the expansion
-    // phase the compiler attempted to open libstd to read out its macros. This
-    // invoked the LLVMRustOpenArchive shim which in turned went to LLVM to go
-    // open a file and read it. Lo and behold this function returned an error!
-    // It was then discovered that when the same fix mentioned in #13259 was
-    // applied, the error went away. The plot thickens!
-    //
-    // Remember that rustdoc works without --test, which raises the question of
-    // how because the --test and non --test paths are almost identical. The
-    // first thing both paths do is parse and expand a crate! It turns out that
-    // the difference is that --test runs on the *main task* while the normal
-    // path runs in subtask. It turns out that running --test in a sub task also
-    // fixes the problem!
-    //
-    // So, in summary, it is unknown why this is necessary, what it is
-    // preventing, or what the actual bug is. In the meantime, this allows
-    // --test to work on windows, which seems good, right? Fun times.
-    let (tx, rx) = channel();
-    spawn(proc() {
-        std::os::set_exit_status(main_args(std::os::args().as_slice()));
-        tx.send(());
-    });
-
-    // If the task failed, set an error'd exit status
-    if rx.recv_opt().is_err() {
-        std::os::set_exit_status(std::rt::DEFAULT_ERROR_CODE);
-    }
+    std::os::set_exit_status(main_args(std::os::args().as_slice()));
 }
 
 pub fn opts() -> Vec<getopts::OptGroup> {