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http://issues.apache.org/bugzilla/show_bug.cgi?id=28695

Jasper as Ant Task throws NullPointerException on compile error

           Summary: Jasper as Ant Task throws NullPointerException on
                    compile error
           Product: Tomcat 4
           Version: 4.1.30
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: Normal
          Priority: Other
         Component: Jasper
        AssignedTo: [EMAIL PROTECTED]
        ReportedBy: [EMAIL PROTECTED]


If Jasper is used as an Ant task to precompile JSPs, and the compile attribute
is set to false (the default), then generateJava() is called on the Compiler
class rather than compile() (which subsequently invokes generateJava).  However,
generateJava never initializes errDispatcher in the Compiler class, so if any
problems are encountered compiling a JSP page, instead of seeing a useful error
message, NullPointerException is thrown.

My fix for this was to add the following code:

    if (errDispatcher == null) {
        this.errDispatcher = new ErrorDispatcher();
    }

At the very beginning of Compiler.generateJava()

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