JasonTypesCodes / grvy-cr-bug

Groovy Complier Issue With CR Line Endings

I spent a fair chunk of time yesterday debugging some code that wouldn’t compile and the error that was reported was "String index out of bounds". By process of elimination I was able to track the issue to a syntax error in a particular file and fixing the error resulted in the project compiling successfully. I was having difficulty understanding how the error that was present would result in the StringIndexOutOfBoundsException reported by the compiler.

I eventually determined that the file in question had some strange line endings of CR only.

The App.groovy file in this project has CR line endings as well as bad syntax which should result in a compilation error. Compiling the file will result in a StringIndexOutOfBoundsException which I suspect is a result of parsing the file in order to report the issue back to the user. Fixing the syntax error will cause the file to compile and run as expected.

$ groovy --version
Groovy Version: 4.0.3 JVM: 11.0.12 Vendor: Oracle Corporation OS: Linux

$ groovy app/src/main/groovy/grvy/cr/bug/App.groovy
java.lang.reflect.InvocationTargetException
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:566)
        at org.codehaus.groovy.tools.GroovyStarter.rootLoader(GroovyStarter.java:109)
        at org.codehaus.groovy.tools.GroovyStarter.main(GroovyStarter.java:132)
Caused by: java.lang.StringIndexOutOfBoundsException: begin 228, end 2, length 2
        at java.base/java.lang.String.checkBoundsBeginEnd(String.java:3319)
        at java.base/java.lang.String.substring(String.java:1874)
        at org.codehaus.groovy.control.SourceUnit.getSample(SourceUnit.java:286)
        at org.codehaus.groovy.control.messages.SyntaxErrorMessage.write(SyntaxErrorMessage.java:55)
        at org.codehaus.groovy.control.ErrorCollector.write(ErrorCollector.java:303)
        at org.codehaus.groovy.control.ErrorCollector.write(ErrorCollector.java:323)
        at org.codehaus.groovy.control.MultipleCompilationErrorsException.getMessage(MultipleCompilationErrorsException.java:60)
        at java.base/java.lang.Throwable.getLocalizedMessage(Throwable.java:396)
        at java.base/java.lang.Throwable.toString(Throwable.java:485)
        at java.base/java.lang.String.valueOf(String.java:2951)
        at java.base/java.io.PrintStream.println(PrintStream.java:897)
        at groovy.ui.GroovyMain.run(GroovyMain.java:393)
        at groovy.ui.GroovyMain.access$1400(GroovyMain.java:67)
        at groovy.ui.GroovyMain$GroovyCommand.process(GroovyMain.java:313)
        at groovy.ui.GroovyMain.processArgs(GroovyMain.java:141)
        at groovy.ui.GroovyMain.main(GroovyMain.java:114)
        ... 6 more