[MCHECKSTYLE-348] Checkstyle plugin fails on Unicode Escapes

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Invalid
• Affects Version/s: 2.17, 3.0.0
• Component/s: checkstyle:checkstyle
• Assignee: Robert Scholte
• Reporter: Leon K
• Created: 21/Jan/18 08:50
• Updated: 21/Jan/18 15:48
• Resolved: 21/Jan/18 15:48

Description

Checkstyle plugin fails to correctly handle Unicode Escapes https://docs.oracle.com/javase/specs/jls/se8/html/jls-3.html#jls-3.3 ).

This issue was introduced in 2.17. It does not occur with earlier versions of maven-checkstyle-plugin.

For this code:

public class Test {
    private String things;
    private String \u06c5;
}

The following occurs with checkstyle:checkstyle :

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-checkstyle-plugin:2.17:checkstyle (default-cli) on project checkstyle-bug: An error has occurred in Checkstyle report generation.: Failed during checkstyle configuration: TokenStreamRecognitionException occurred during the analysis of file C:\TEMP\checkstyle-bug\src\main\java\Test.java. unexpected char: '\' -> [Help 1]

Similarly for 3.0.0, we get the same error:

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-checkstyle-plugin:3.0.0:checkstyle (default-cli) on project checkstyle-bug: An error has occurred in Checkstyle report generation.: Failed during checkstyle configuration: Exception was thrown while processing C:\TEMP\checkstyle-bug\src\main\java\Test.java: TokenStreamRecognitionException occurred during the analysis of file C:\TEMP\checkstyle-bug\src\main\java\Test.java. unexpected char: '\' -> [Help 1]

For 2.16 and earlier, checkstyle:checkstyle completes without error.