Problem: Using closure may consume a lot of memory.
Solution: unreference items that are no longer needed. Add a test. (Ozaki
Kiichi, closesvim/vim#3961)
209b8e3e3b
Problem: Crash if triggering garbage collector after a function call.
(Michael Henry)
Solution: Don't call the garbage collector right away, do it later.
(closesvim/vim#3894)
889da2f243
Problem: May use a lot of memory when a function creates a cyclic
reference.
Solution: After saving a funccal many times, invoke the garbage collector.
(closesvim/vim#3835)
4456ab527a
