Add ICE 77993 (#506)

oliviacrain · web-flow · commit be934ce200a1 · 2020-10-16T15:51:53.000+01:00
diff --git a/ices/77993.sh b/ices/77993.sh
@@ -0,0 +1,10 @@
+#!/bin/bash
+
+rustc --edition 2018 - << EOF
+async fn test() -> Box<dyn std::error::Error> {
+    macro!()
+}
+
+fn main() {}
+
+EOF
