Even better stack chains with VM async/await.

lib/src/vm_trace.dart

Index: lib/src/vm_trace.dart
diff --git a/lib/src/vm_trace.dart b/lib/src/vm_trace.dart
index 89474f58322f8d2e98dfa3dc4ca6de6e1532d11c..79911602ac7b59abadfc31d8315a8a17eb93c186 100644
--- a/lib/src/vm_trace.dart
+++ b/lib/src/vm_trace.dart
@@ -23,8 +23,9 @@ class VMTrace implements StackTrace {
     return frames.map((frame) {
       var number = padRight("#${i++}", 8);
       var member = frame.member
-          .replaceAll("<fn>", "<anonymous closure>")
-          .replaceAll("<async>", "<<anonymous closure>_async_body>");
+          .replaceAllMapped(new RegExp(r"[^.]+\.<async>"),
+              (match) => "${match[1]}.<${match[1]}_async_body>")
+          .replaceAll("<fn>", "<anonymous closure>");
       var line = frame.line == null ? 0 : frame.line;
       var column = frame.column == null ? 0 : frame.column;
       return "$number$member (${frame.uri}:$line:$column)\n";