Cherry-pick #12600 to 7.2: Fix bug / leak in JS function processors #12604
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In an effort to minimize allocations a slice used to hold function arguments is reused rather than allocation new each time a Javascript function processor is used. However there was a typo in re-slicing code so instead of reseting the length to 0 it was a no-op. Hence all future invocations appended to the slice causing a leak. This affects code that uses native Javascript functions in a processor chain (e.g. `new process.Chain().Add(function(event) { event.Put("x", "y"); }).Build()`).
(cherry picked from commit eb06c9a)
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In an effort to minimize allocations a slice used to hold function arguments is reused rather than allocation new each time a Javascript function processor is used. However there was a typo in re-slicing code so instead of reseting the length to 0 it was a no-op. Hence all future invocations appended to the slice causing a leak. This affects code that uses native Javascript functions in a processor chain (e.g. `new process.Chain().Add(function(event) { event.Put("x", "y"); }).Build()`).
(cherry picked from commit f69330a)
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Cherry-pick of PR #12600 to 7.2 branch. Original message:
In an effort to minimize allocations a slice used to hold function arguments is reused rather than allocation new each time a Javascript function processor is used. However there was a typo in re-slicing code so instead of reseting the length to 0 it was a no-op. Hence all future invocations appended to the slice causing a leak. This affects code that uses native Javascript functions in a processor chain (e.g.
new process.Chain().Add(function(event) { event.Put("x", "y"); }).Build()).