ParserException: InvalidRegularExpression on valid regex

[MaceWindu]

Regular expression literal:

/(?:\s|\/\/.*|\/\*[^]*?\*\/)*/g

Source @babel\parser\lib\index.js

const skipWhiteSpace = /(?:\s|\/\/.*|\/\*[^]*?\*\/)*/g;  

index.zip

[MaceWindu]

Another case:

var match = text.match(/^(\s*)([^]*\S)(\s*)$/); 

postcss-safe-parser\lib\safe-parser.js
safe-parser.zip

[MaceWindu]

var regex = /{[^]*/gm,

specificity\specificity.js
specificity.zip

[MaceWindu]

const pathToArgumentName = input => {
		return input
			.replace(/\./g, "-")
			.replace(/\[\]/g, "")
			.replace(
				/(\p{Uppercase_Letter}+|\p{Lowercase_Letter}|\d)(\p{Uppercase_Letter}+)/gu,
				"$1-$2"
			)
			.replace(/-?[^\p{Uppercase_Letter}\p{Lowercase_Letter}\d]+/gu, "-")
			.toLowerCase();
	}; 

webpack\lib\cli.js
cli.zip

[jimbo118]

I also ran into this:

var parser = new Esprima.JavaScriptParser(@"var O = /[^]*? (:[rp] [el] a[\w -]+)[^]*/");
var program = parser.ParseScript();

Throw:

ParserException: Line 1: Invalid regular expression
Esprima.Scanner.ThrowUnexpectedToken (System.String message) (at <8417cb4e01e54c02aaa0c58a3fa07237>:0)
Esprima.Scanner.TestRegExp (System.String pattern, System.String flags) (at <8417cb4e01e54c02aaa0c58a3fa07237>:0)
Esprima.Scanner.ScanRegExp () (at <8417cb4e01e54c02aaa0c58a3fa07237>:0)
Esprima.JavaScriptParser.NextRegexToken () (at <8417cb4e01e54c02aaa0c58a3fa07237>:0)
Esprima.JavaScriptParser.ParsePrimaryExpression () (at <8417cb4e01e54c02aaa0c58a3fa07237>:0)
Esprima.JavaScriptParser.InheritCoverGrammar[T] (System.Func`1[TResult] parseFunction) (at <8417cb4e01e54c02aaa0c58a3fa07237>:0)
Esprima.JavaScriptParser.ParseLeftHandSideExpressionAllowCall () (at <8417cb4e01e54c02aaa0c58a3fa07237>:0)
Esprima.JavaScriptParser.InheritCoverGrammar[T] (System.Func`1[TResult] parseFunction) (at <8417cb4e01e54c02aaa0c58a3fa07237>:0)
Esprima.JavaScriptParser.ParseUpdateExpression () (at <8417cb4e01e54c02aaa0c58a3fa07237>:0)
Esprima.JavaScriptParser.ParseUnaryExpression () (at <8417cb4e01e54c02aaa0c58a3fa07237>:0)
Esprima.JavaScriptParser.InheritCoverGrammar[T] (System.Func`1[TResult] parseFunction) (at <8417cb4e01e54c02aaa0c58a3fa07237>:0)
Esprima.JavaScriptParser.ParseExponentiationExpression () (at <8417cb4e01e54c02aaa0c58a3fa07237>:0)
Esprima.JavaScriptParser.InheritCoverGrammar[T] (System.Func`1[TResult] parseFunction) (at <8417cb4e01e54c02aaa0c58a3fa07237>:0)
Esprima.JavaScriptParser.ParseBinaryExpression () (at <8417cb4e01e54c02aaa0c58a3fa07237>:0)
Esprima.JavaScriptParser.InheritCoverGrammar[T] (System.Func`1[TResult] parseFunction) (at <8417cb4e01e54c02aaa0c58a3fa07237>:0)
Esprima.JavaScriptParser.ParseConditionalExpression () (at <8417cb4e01e54c02aaa0c58a3fa07237>:0)
Esprima.JavaScriptParser.ParseAssignmentExpression () (at <8417cb4e01e54c02aaa0c58a3fa07237>:0)
Esprima.JavaScriptParser.IsolateCoverGrammar[T] (System.Func`1[TResult] parseFunction) (at <8417cb4e01e54c02aaa0c58a3fa07237>:0)
Esprima.JavaScriptParser.ParseVariableDeclaration (System.Boolean& inFor) (at <8417cb4e01e54c02aaa0c58a3fa07237>:0)
Esprima.JavaScriptParser.ParseVariableDeclarationList (System.Boolean& inFor) (at <8417cb4e01e54c02aaa0c58a3fa07237>:0)
Esprima.JavaScriptParser.ParseVariableStatement () (at <8417cb4e01e54c02aaa0c58a3fa07237>:0)
Esprima.JavaScriptParser.ParseStatement () (at <8417cb4e01e54c02aaa0c58a3fa07237>:0)
Esprima.JavaScriptParser.ParseStatementListItem () (at <8417cb4e01e54c02aaa0c58a3fa07237>:0)
Esprima.JavaScriptParser.ParseScript (System.Boolean strict) (at <8417cb4e01e54c02aaa0c58a3fa07237>:0)

But it's valid on the Esprima online parserpage:

Esprima Online Parser

[sebastienros]

I was able to isolate the issue for all these reports to /[^]/. Working on the fix.