auto merge of #11644 : huonw/rust/less-fatality, r=cmr

This means that compilation continues for longer, and so we can see more
errors per compile. This is mildly more user-friendly because it stops
users having to run rustc n times to see n macro errors: just run it
once to see all of them.

src/test/compile-fail/macros-nonfatal-errors.rs

@@ -0,0 +1,48 @@
+// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// test that errors in a (selection) of macros don't kill compilation
+// immediately, so that we get more errors listed at a time.
+
+#[feature(asm)];
+
+#[deriving(Default, //~ ERROR
+           Rand, //~ ERROR
+           Zero)] //~ ERROR
+enum CantDeriveThose {}
+
+fn main() {
+    doesnt_exist!(); //~ ERROR
+
+    bytes!(invalid); //~ ERROR
+
+    asm!(invalid); //~ ERROR
+
+    concat_idents!("not", "idents"); //~ ERROR
+
+    option_env!(invalid); //~ ERROR
+    env!(invalid); //~ ERROR
+    env!(foo, abr, baz); //~ ERROR
+    env!("RUST_HOPEFULLY_THIS_DOESNT_EXIST"); //~ ERROR
+
+    foo::blah!(); //~ ERROR
+
+    format!(); //~ ERROR
+    format!(invalid); //~ ERROR
+
+    include!(invalid); //~ ERROR
+
+    include_str!(invalid); //~ ERROR
+    include_str!("i'd be quite surprised if a file with this name existed"); //~ ERROR
+    include_bin!(invalid); //~ ERROR
+    include_bin!("i'd be quite surprised if a file with this name existed"); //~ ERROR
+
+    trace_macros!(invalid); //~ ERROR
+}