NPE when using functions
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- Dominant language
- Java
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- 474
- Forks
- 148
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Description
There is an unhandled error in Xsoup when using XPath expressions with query in any functions. For example:
//tr[contains(td[1]/text(), 'something')]/td[2]/text()
This causes a NullPointerException at line 53 in CombiningEvaluator due to a null return value in the XPathParser::byFunction method.
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First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Reproduce the XPath expression from the issue and inspect line 53 in CombiningEvaluator, then trace the null return from XPathParser::byFunction. Confirm the intended behavior for functions and verify that the expression no longer causes a NullPointerException.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- java
- Domain
- backend
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 45/100