2cfd980528
This PR fixes a memleak caused by the Lean based `IO.waitAny`
implementation by reverting it.
This the faulty Lean implementation:
```lean
def IO.waitAny (tasks : @& List (Task α)) (h : tasks.length > 0 := by exact Nat.zero_lt_succ _) :
BaseIO α := do
have : Nonempty α := ⟨tasks[0].get⟩
let promise : IO.Promise α ← IO.Promise.new
tasks.forM <| fun t => BaseIO.chainTask (sync := true) t promise.resolve
return promise.result!.get
```
In a situation where we call this function repeatedly in a loop with a
pair of tasks `[t1, t2]`
where `t2` is a long lived task that we pass every time and `t1` is
fresh a short lived task, `t2` will
accumlate more and more children from `BaseIO.chainTask` that fill
memory over time. The old C++
implementation did not have this issue so we are reverting.
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| .. | ||
| lean.h | ||
| lean_gmp.h | ||
| lean_libuv.h | ||