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Showing content from https://github.com/pmd/pmd/issues/2752 below:

[go] Error parsing unicode values · Issue #2752 · pmd/pmd · GitHub

Affects PMD Version: 6.26.0

Description:

CPD crashing on following file, didn't expect that. Maybe related to #2605 ?

Exception Stacktrace:

net.sourceforge.pmd.lang.ast.TokenMgrError: Lexical error in file /tmp/goIsAmazing-master/goBasis/src/fundation/5. sliceOperation/sliceOperation6.go at line 20, column 12.  Encountered: token recognition error at: ''??'
        at net.sourceforge.pmd.cpd.AntlrTokenizer.tokenize(AntlrTokenizer.java:44)
        at net.sourceforge.pmd.cpd.CPD.addAndThrowLexicalError(CPD.java:144)
        at net.sourceforge.pmd.cpd.CPD.add(CPD.java:139)
        at net.sourceforge.pmd.cpd.CPD.add(CPD.java:108)
        at net.sourceforge.pmd.cpd.CPD.add(CPD.java:70)
        at net.sourceforge.pmd.cpd.CPD.addDirectory(CPD.java:80)
        at net.sourceforge.pmd.cpd.CPD.addRecursively(CPD.java:65)
        at net.sourceforge.pmd.cpd.CPDCommandLineInterface.addSourcesFilesToCPD(CPDCommandLineInterface.java:134)
        at net.sourceforge.pmd.cpd.CPDCommandLineInterface.addSourceFilesToCPD(CPDCommandLineInterface.java:114)
        at net.sourceforge.pmd.cpd.CPDCommandLineInterface.main(CPDCommandLineInterface.java:87)
        at net.sourceforge.pmd.cpd.CPD.main(CPD.java:179)
Caused by: LexerNoViableAltException(''')
        at org.antlr.v4.runtime.atn.LexerATNSimulator.failOrAccept(LexerATNSimulator.java:312)
        at org.antlr.v4.runtime.atn.LexerATNSimulator.execATN(LexerATNSimulator.java:233)
        at org.antlr.v4.runtime.atn.LexerATNSimulator.match(LexerATNSimulator.java:117)
        at org.antlr.v4.runtime.Lexer.nextToken(Lexer.java:141)
        at net.sourceforge.pmd.lang.go.antlr4.GolangLexer.nextToken(GolangLexer.java:126)
        at net.sourceforge.pmd.lang.antlr.AntlrTokenManager.getNextTokenFromAnyChannel(AntlrTokenManager.java:47)
        at net.sourceforge.pmd.lang.antlr.AntlrTokenManager.getNextToken(AntlrTokenManager.java:40)
        at net.sourceforge.pmd.cpd.token.internal.BaseTokenFilter.getNextToken(BaseTokenFilter.java:45)
        at net.sourceforge.pmd.cpd.AntlrTokenizer.tokenize(AntlrTokenizer.java:39)
        ... 10 more

Code Sample demonstrating the issue:

https://github.com/SuperSupeng/goIsAmazing/blob/0fef5154b97dd170144254596c46d5892454c928/goBasis/src/fundation/5.%20sliceOperation/sliceOperation6.go#L20:

package main

import "fmt"

func main() {
	//string底层是一个byte数组，因此string也可以进行切片操作
	str := "hello world"//string是不可变的
	slice := str[4:]
	fmt.Println(slice)

	//若要对string进行修改需要将string修改为byte或rune的切片在操作
	//但是转为byte无法进行中文操作
	bytes := []byte(str)
	bytes[2] = 'x'
	str = string(bytes)
	fmt.Println(str)

	//转换成rune可以对中文进行操作
	runes := []rune(str)
	runes[0] = '哈'
	str = string(runes)
	fmt.Println(str)

}

Steps to reproduce:

Clone linked repository and run cpd: ./run.sh cpd --files . --language go --minimum-tokens 50

Running PMD through: CLI

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