Inconsistent variable binding in @async blocks

[amitmurthy]

The same @sync blocks below, run twice results in different outputs

• in the first run, variable t is bound to the value when it is printed
• in the second run, variable t is bound to the value when the block is entered

 _/ |\__'_|_|_|\__'_|  |  Commit 563ba1c84 2013-07-14 04:02:55*
|__/                   |  x86_64-linux-gnu

julia> @sync begin
           t = false
           @async begin
               sleep(1.0)
               print("1: ", t, "\n")
           end

           t = true
       end
1: true
true

julia> @sync begin
           t = false
           @async begin
               sleep(1.0)
               print("1: ", t, "\n")
           end

           t = true
       end
1: false
true

julia>

[StefanKarpinski]

If you change this to a let block it's 1: false both times.

[amitmurthy]

Yeah, but let blocks create new local bindings.

Came across this anomaly when I was trying to figure out https://groups.google.com/d/topic/julia-users/YDxPRQhygAA/discussion

[amitmurthy]

Closed by #19594