Use errormonitor() in a few places

Author: JamesWrigley

src/cluster.jl

@@ -757,17 +757,20 @@ function check_master_connect()
     if ccall(:jl_running_on_valgrind,Cint,()) != 0
         return
     end
-    @async begin
-        start = time_ns()
-        while !haskey(map_pid_wrkr, 1) && (time_ns() - start) < timeout
-            sleep(1.0)
-        end
 
-        if !haskey(map_pid_wrkr, 1)
-            print(stderr, "Master process (id 1) could not connect within $(timeout/1e9) seconds.\nexiting.\n")
-            exit(1)
+    errormonitor(
+        @async begin
+            start = time_ns()
+            while !haskey(map_pid_wrkr, 1) && (time_ns() - start) < timeout
+                sleep(1.0)
+            end
+
+            if !haskey(map_pid_wrkr, 1)
+                print(stderr, "Master process (id 1) could not connect within $(timeout/1e9) seconds.\nexiting.\n")
+                exit(1)
+            end
         end
-    end
+    )
 end