Using Future throws `Scheduler: nothing left to resume so we are exiting`

Question

I'm playing with Futures in Io. I have some methods that do some work:

a := method(10 + 20)
b := method(20 + 30)
c := method(30 + 40)

And I want to run them concurrently. This works as expected:

m := method(list(@a, @b, @c))

f := @m
writeln((f join(" + ")) .. " = " .. f sum)

However, moving the work of creating the string into method m does not work:

m := method(
    s := list(@a, @b, @c)
    ((s join(" + ")) .. " = " .. (s sum))
)

f := @m
writeln(f)

This raises Scheduler: nothing left to resume so we are exiting.

Why? What have I not understood?

This now sounds like it's a bug in Io itself. – Dave Nolan Mar 02 '13 at 14:57 — Dave Nolan, Mar 02 '13 at 14:57

score 1 · Answer 1 · answered Jan 13 '15 at 07:30

1

It's a bug in the interactive interpreter. If you put your code in a file it should work fine.

answered Jan 13 '15 at 07:30

Steve Dekorte

79
1
4

Sadly not true. `~/scrap $ io --version` `Io Programming Language, v. 20140919` – Dave Nolan Jan 15 '15 at 02:00

score 0 · Answer 2 · answered Aug 07 '14 at 20:03

I don't have an answer to your question, but I believe that this error is independent of your problem since I encountered it doing much more simple work in the interpreter.

Io> 1 proto
==> 0
Io> 5 proto
==> 0
Io> 0 proto
==> 0
Scheduler: nothing left to resume so we are exiting
  ---------
  Coroutine callStack                  A4_Exception.io 244
  Coroutine backTraceString            A4_Exception.io 274
  Coroutine showStack                  A4_Exception.io 177
  Coroutine pause                      A4_Exception.io 286

Then I tried the command again and it worked fine:

╰─➤  io
Io 20110905
Io> 0 proto
==> 0

This just happened to me too - just some very simple stuff in the interpreter and then got the exact same message as you. — Matt Hogan-Jones, Aug 25 '14 at 11:05

zheolong · Answer 3 · 2015-11-16T01:50:01.337

-1

In io source code dir:

rm ./libs/iovm/source/IoVMInit.c
open ./libs/iovm/io/A4_Exception.io and uncomment this line //Exception raise("Scheduler: nothing left to resume so we are exiting")
rebuild and reinstall

edited Nov 16 '15 at 01:50

answered Nov 11 '15 at 07:51

zheolong

31
6

Using Future throws `Scheduler: nothing left to resume so we are exiting`

3 Answers3