diff --git a/package-commonjs.json b/output/post-build/lib.commonjs/package-commonjs.json
similarity index 100%
rename from package-commonjs.json
rename to output/post-build/lib.commonjs/package-commonjs.json
diff --git a/src.ts/abi/fragments.ts b/src.ts/abi/fragments.ts
index e72654d90d..c7dc1ccd91 100644
--- a/src.ts/abi/fragments.ts
+++ b/src.ts/abi/fragments.ts
@@ -137,10 +137,13 @@ const SimpleTokens: Record<string, string> = {
 };
 
 // Parser regexes to consume the next token
-const regexWhitespace = new RegExp("^(\\s*)");
-const regexNumber = new RegExp("^([0-9]+)");
-const regexIdentifier = new RegExp("^([a-zA-Z$_][a-zA-Z0-9$_]*)");
-const regexType = new RegExp("^(address|bool|bytes([0-9]*)|string|u?int([0-9]*))");
+const regexWhitespacePrefix = new RegExp("^(\\s*)");
+const regexNumberPrefix = new RegExp("^([0-9]+)");
+const regexIdPrefix = new RegExp("^([a-zA-Z$_][a-zA-Z0-9$_]*)");
+
+// Parser regexs to check validity
+const regexId = new RegExp("^([a-zA-Z$_][a-zA-Z0-9$_]*)$");
+const regexType = new RegExp("^(address|bool|bytes([0-9]*)|string|u?int([0-9]*))$");
 
 /**
  *  @ignore:
@@ -293,7 +296,7 @@ function lex(text: string): TokenString {
 
         // Strip off any leading whitespace
         let cur = text.substring(offset);
-        let match = cur.match(regexWhitespace);
+        let match = cur.match(regexWhitespacePrefix);
         if (match) {
             offset += match[1].length;
             cur = text.substring(offset);
@@ -347,7 +350,7 @@ function lex(text: string): TokenString {
             continue;
         }
 
-        match = cur.match(regexIdentifier);
+        match = cur.match(regexIdPrefix);
         if (match) {
             token.text = match[1];
             offset += token.text.length;
@@ -366,7 +369,7 @@ function lex(text: string): TokenString {
             continue;
         }
 
-        match = cur.match(regexNumber);
+        match = cur.match(regexNumberPrefix);
         if (match) {
             token.text = match[1];
             token.type = "NUMBER";
@@ -841,7 +844,7 @@ export class ParamType {
         }
 
         const name = obj.name;
-        assertArgument(!name || (typeof(name) === "string" && name.match(regexIdentifier)),
+        assertArgument(!name || (typeof(name) === "string" && name.match(regexId)),
             "invalid name", "obj.name", name);
 
         let indexed = obj.indexed;
@@ -1019,7 +1022,7 @@ export abstract class NamedFragment extends Fragment {
      */
     constructor(guard: any, type: FragmentType, name: string, inputs: ReadonlyArray<ParamType>) {
         super(guard, type, inputs);
-        assertArgument(typeof(name) === "string" && name.match(regexIdentifier),
+        assertArgument(typeof(name) === "string" && name.match(regexId),
             "invalid identifier", "name", name);
         inputs = Object.freeze(inputs.slice());
         defineProperties<NamedFragment>(this, { name });