There is too much missing from what you've posted to be able to mock something up to allow it to compile.

The most productive technique I've found for tracking down such leaks is a simple, if rather laborious one of commenting out most of the body of the code -- for example, so that it returns just an empty hash or even just a scalar -- and checking that it no longer leaks. Then put it back in chunks until the leak reappears. Not sophisticated, but reliable.

Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.

In reply to Re^5: Tracing memory leak by BrowserUk
in thread Tracing memory leak by halfcountplus

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