DO NOT REPLY [Bug 22277] New: - SMAP LineInfo entries with an outputStartLine of 0

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http://nagoya.apache.org/bugzilla/show_bug.cgi?id=22277

SMAP LineInfo entries with an outputStartLine of 0

           Summary: SMAP LineInfo entries with an outputStartLine of 0
           Product: Tomcat 5
           Version: Nightly Build
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: Blocker
          Priority: Other
         Component: Jasper2
        AssignedTo: tomcat-dev@jakarta.apache.org
        ReportedBy: ecarmich@alumni.rice.edu


Jasper sometimes generates SMAP LineInfo entries with an outputStartLine of 
0.  These LineInfo entries are incorrect, and also can cause a fatal error in 
SmapStratum.java's optimizeLineSection(), making it impossible for Jasper to 
compile the JSP.

Note that the incorrect entries predate optimizeLineSection (they were present 
in Tomcat 5.0.4, and possibly earlier), but optimizeLineSection does blow the 
problem out of proportion, turning a flawed SMAP into a failed compilation.  I 
will attach a patch that fixes the blowing-out-of-proportion problem, at 
least, in order to make Tomcat more usable until I (or anyone else who wants 
to try their hand) can fix the underlying outputStartLine=0 problem.  Another 
workaround is to set suppressSmap=true.

The problem can be reproduced by compiling xml/xml.jsp from the jsp-examples 
webapp that ships with Tomcat 5.  The SMAP generated for that JSP is as 
follows:

C:\Program Files\jakarta-tomcat-5.0.4
\work\Catalina\localhost\test\org\apache\jsp\xml\xml_jsp.java
JSP
*S JSP
*F
+ 0 xml.jsp
/xml/xml.jsp
*L
8:0
15:0,0
16:0,0
17:0,0
17:47
20:0,0
21:51
22:0,0
24:0,0
24:54
25:56
39:57
42:0,0
43:59
44:60
48:0,0
49:64
49:65
49:66
49:67
49:68
49:69
49:70
*E

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