diff --git a/lib/wasmparser.js b/lib/wasmparser.js
index 8001848..bb03862 100644
--- a/lib/wasmparser.js
+++ b/lib/wasmparser.js
@@ -3,7 +3,7 @@
 const stream = require('stream');
 const EventEmitter = require('events').EventEmitter;
 // let lib = require('bindings')('vcd.node');
-const util = require('util');
+// const util = require('util');
 
 
 module.exports = async () => {
diff --git a/lib/wrapper.js b/lib/wrapper.js
index 122701a..a10ed50 100644
--- a/lib/wrapper.js
+++ b/lib/wrapper.js
@@ -3,7 +3,7 @@
 const dotProp = require('dot-prop');
 
 function _waitForStart(mod) {
-  return new Promise((resolve, reject)=>{
+  return new Promise((resolve)=>{
     mod.addOnPostRun(resolve);
   });
 }
diff --git a/test/wasmdump.js b/test/wasmdump.js
index 9276d6d..076f4e2 100644
--- a/test/wasmdump.js
+++ b/test/wasmdump.js
@@ -21,7 +21,6 @@ describe('dump', () => {
     ['"}G', '{u', 'u)'] // array of all signal ids
       .map(id =>
         inst.change.on(id, (time, cmd, value, mask) => {
-          console.log(time, cmd, value, mask);
           dump.push({
             id,
             time,
@@ -82,7 +81,11 @@ $timescale   1ns $end
 0"}G
 #200
 1"}G
-bzzzzxxxx11110000ZZZZXXXX11110000zzzzxxxx11110000zzzzxxxx11110000 {u
+bzzzzxxxx11110000ZZZZXXXX11110000zzzzxxx`);
+
+// break in the middle of the number scan
+
+     inst.write(                       `x11110000zzzzxxxx11110000 {u
 #300
 0"}G
 b1111000000000000000000000000000000000000000000000000000000000000 {u