1 files changed, 18 insertions, 0 deletions
diff --git a/third_party/rust/error-chain/examples/has_backtrace.rs b/third_party/rust/error-chain/examples/has_backtrace.rs
new file mode 100644
index 0000000000..c5dac058a8
--- /dev/null
+++ b/third_party/rust/error-chain/examples/has_backtrace.rs
@@ -0,0 +1,18 @@
+//! Exits with exit code 0 if backtraces are disabled and 1 if they are enabled.
+//! Used by tests to make sure backtraces are available when they should be. Should not be used
+//! outside of the tests.
+
+#[macro_use]
+extern crate error_chain;
+
+error_chain! {
+    errors {
+        MyError
+    }
+}
+
+fn main() {
+    let err = Error::from(ErrorKind::MyError);
+    let has_backtrace = err.backtrace().is_some();
+    ::std::process::exit(has_backtrace as i32);
+}