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-rw-r--r--cpp/tangle/001trace.cc2
1 files changed, 1 insertions, 1 deletions
diff --git a/cpp/tangle/001trace.cc b/cpp/tangle/001trace.cc
index a56fc200..a02cacd4 100644
--- a/cpp/tangle/001trace.cc
+++ b/cpp/tangle/001trace.cc
@@ -2,7 +2,7 @@ bool Hide_warnings = false;
 
 struct trace_stream {
   vector<pair<string, pair<int, string> > > past_lines;  // [(layer label, frame, line)]
-  unordered_map<string, int> frame;
+  map<string, int> frame;
   // accumulator for current line
   ostringstream* curr_stream;
   string curr_layer;