diff -r e8a0af9fc1cb -r 3a3803a0c789 src/share/tools/hsdis/hsdis.c
--- a/src/share/tools/hsdis/hsdis.c	Mon Sep 23 20:26:18 2019 +0200
+++ b/src/share/tools/hsdis/hsdis.c	Fri Apr 03 14:14:26 2020 +0100
@@ -438,6 +438,7 @@
     }
     p = q;
   }
+  *iop = '\0';
 }
 
 static void print_help(struct hsdis_app_data* app_data,