Assume output strings are longer than their source byte sequences

Author: bugadani

espflash/src/cli/monitor/mod.rs

@@ -158,7 +158,10 @@ fn try_parse_mixed(process: &mut impl FnMut(FrameKind<'_>), table: &Table, frame
     let is_valid_frame = |frame_bytes| {
         let mut decoder = table.new_stream_decoder();
         decoder.received(frame_bytes);
-        decoder.decode().is_ok()
+        match decoder.decode() {
+            Ok(frame) => frame.display_message().to_string().len() > frame_bytes.len(),
+            Err(_) => false,
+        }
     };
 
     let assume_text = |frame_bytes: &[u8]| {