0000121: c:forEach NoSuchElementException with len mod step != 0

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Category

Severity

Reproducibility

Date Submitted

Last Update

0000121

[Resin]

minor

always

04-25-05 00:00

05-11-05 00:00

Reporter

sam

View Status

public

Assigned To

Priority

normal

Resolution

fixed

Platform

Status

closed

Projection

none

OS Version

ETA

none

Fixed in Version

3.0.13

Product Version

3.0.12

Product Build

3.0.12

Summary

0000121: c:forEach NoSuchElementException with len mod step != 0

Description

RSN-112
(rep by T Palmer)

The problem I found is when using the JSTL tag c:forEach with items and
with step > 1 (where the number of items is not divisible by the step).
For instance, this (using indexes rather than items) works:

<c:forEach var="index" begin="0" end="${fn:length(someWords)}"
step="3">

This does not:

<c:forEach var="item" items="${someWords}" step="3">

At the end of the iteration (if it doesn't line up perfectly), you get a
NoSuchElementException. This is the compiled code that causes the problem:

for (int _jsp_si_3 = _jsp_step_3; _jsp_si_3 > 1; _jsp_si_3--)
_jsp_iter_3.next();

There is no check for whether the next element exists. I think that the
behavior of this situation isn't incredibly explicit in the JSTL (1.1)
spec, but I would expect it to complete without an exception just as in
the case of the index looping mentioned earlier.

Steps To Reproduce

Additional Information

Attached Files

Relationships

Notes
(0000141) ferg 04-25-05 00:00	jsp/1cm6

Issue History
Date Modified	Username	Field	Change
04-25-05 00:00	sam	New Issue
11-30-05 00:00	administrator	Fixed in Version	=> 3.0.13

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