add a GC safepoint in Task.wait (#41441)

vilterp · staticfloat · commit d216f5ec1d3d · 2022-12-22T23:59:04.000Z
(cherry picked from commit 97f817a)
diff --git a/base/task.jl b/base/task.jl
@@ -764,6 +764,7 @@ end
 end
 
 function wait()
+    GC.safepoint()
     W = Workqueues[Threads.threadid()]
     poptask(W)
     result = try_yieldto(ensure_rescheduled)
