diff --git a/lib/script/common.js b/lib/script/common.js
index 5c9b8f62..c43ecc29 100644
--- a/lib/script/common.js
+++ b/lib/script/common.js
@@ -769,15 +769,18 @@ exports.array = function(value) {
  * @constructor
  * @extends Error
  * @param {String} code - Error code.
- * @param {(Number|String)?} op - Opcode.
+ * @param {Number} op - Opcode.
  * @param {Number?} ip - Instruction pointer.
  * @property {String} message - Error message.
  * @property {String} code - Original code passed in.
- * @property {String?} op - Symbolic opcode.
- * @property {Number?} ip - Instruction pointer.
+ * @property {Number} op - Opcode.
+ * @property {Number} ip - Instruction pointer.
  */
 
 exports.ScriptError = function ScriptError(code, op, ip) {
+  if (!(this instanceof ScriptError))
+    return new ScriptError(code, op, ip);
+
   Error.call(this);
 
   if (Error.captureStackTrace)
@@ -785,27 +788,21 @@ exports.ScriptError = function ScriptError(code, op, ip) {
 
   this.type = 'ScriptError';
   this.code = code;
+  this.message = code;
+  this.op = op != null ? op : -1;
+  this.ip = ip != null ? ip : -1;
 
-  if (typeof op !== 'string') {
-    if (op || ip != null) {
-      code += ' (';
-      if (op) {
-        op = exports.opcodesByVal[op] || op;
-        code += 'op=' + op;
-        if (ip != null)
-          code += ', ';
-      }
-      if (ip != null)
-        code += 'ip=' + ip;
-      code += ')';
-    }
+  if (typeof op === 'number') {
+    if (exports.opcodesByVal[op])
+      op = exports.opcodesByVal[op];
+    else if (op !== -1)
+      op = util.hex8(op);
 
-    this.message = code;
-    this.op = op || '';
-    this.ip = ip != null ? ip : -1;
-  } else {
+    this.message += ' (op=' + op + ',';
+    this.message += ' ip=' + this.ip + ')';
+  } else if (typeof op === 'string') {
     this.message = op;
-    this.op = '';
+    this.op = -1;
     this.ip = -1;
   }
 };
diff --git a/lib/script/script.js b/lib/script/script.js
index 25e78dc3..b812323c 100644
--- a/lib/script/script.js
+++ b/lib/script/script.js
@@ -2524,41 +2524,6 @@ Script.getCoinbaseHeight = function getCoinbaseHeight(raw) {
   return height.toNumber();
 };
 
-/**
- * Get info about a coinbase script.
- * @returns {Object} Object containing `height`,
- * `nonce`, `flags`, and `text`.
- */
-
-Script.prototype.getCoinbaseFlags = function getCoinbaseFlags() {
-  var height = this.getCoinbaseHeight();
-  var index = 0;
-  var nonce, flags, text;
-
-  if (height !== -1)
-    index++;
-
-  nonce = this.getNumber(1);
-
-  if (nonce)
-    nonce = nonce.toNumber();
-  else
-    nonce = -1;
-
-  flags = Script.fromArray(this.code.slice(index));
-  flags = flags.toRaw();
-
-  text = flags.toString('utf8');
-  text = text.replace(/[\u0000-\u0019\u007f-\u00ff]/g, '');
-
-  return {
-    height: height,
-    nonce: nonce,
-    flags: flags,
-    text: text
-  };
-};
-
 /**
  * Test the script against a bloom filter.
  * @param {Bloom} filter