1 files changed, 29 insertions, 0 deletions
diff --git a/src/test/compile-fail/macro-backtrace-println.rs b/src/test/compile-fail/macro-backtrace-println.rs
new file mode 100644
index 00000000000..0c66bbfcf04
--- /dev/null
+++ b/src/test/compile-fail/macro-backtrace-println.rs
@@ -0,0 +1,29 @@
+// Copyright 2015 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.
+
+// The `format_args!` syntax extension issues errors before code expansion
+// has completed, but we still need a backtrace.
+
+// This test includes stripped-down versions of `print!` and `println!`,
+// because we can't otherwise verify the lines of the backtrace.
+
+fn print(_args: std::fmt::Arguments) {}
+
+macro_rules! myprint { //~ NOTE in expansion of
+    ($($arg:tt)*) => (print(format_args!($($arg)*)));
+}
+
+macro_rules! myprintln { //~ NOTE in expansion of
+    ($fmt:expr) => (myprint!(concat!($fmt, "\n"))); //~ ERROR invalid reference to argument `0`
+}
+
+fn main() {
+    myprintln!("{}"); //~ NOTE expansion site
+}