1 files changed, 17 insertions, 0 deletions
diff --git a/library/backtrace/src/print.rs b/library/backtrace/src/print.rs
index 174d8ae5c..8d9cbe3d4 100644
--- a/library/backtrace/src/print.rs
+++ b/library/backtrace/src/print.rs
@@ -86,6 +86,23 @@ impl<'a, 'b> BacktraceFmt<'a, 'b> {
         // Currently a no-op-- including this hook to allow for future additions.
         Ok(())
     }
+
+    /// Inserts a message in the backtrace output.
+    ///
+    /// This allows information to be inserted between frames,
+    /// and won't increment the `frame_index` unlike the `frame`
+    /// method.
+    pub fn message(&mut self, msg: &str) -> fmt::Result {
+        self.fmt.write_str(msg)
+    }
+
+    /// Return the inner formatter.
+    ///
+    /// This is used for writing custom information between frames with `write!` and `writeln!`,
+    /// and won't increment the `frame_index` unlike the `frame` method.
+    pub fn formatter(&mut self) -> &mut fmt::Formatter<'b> {
+        self.fmt
+    }
 }
 
 /// A formatter for just one frame of a backtrace.