How do I break out of an infinite loop in REPL in 1.12?

General Usage
1

While testing the new 1.12 features I tried the following in a REPL:


f(x) = while x end
f(true)

The infinite loop works, so is there a way to break out of it in the REPL using CTRL+ D? Now that there are interactive and worker threads, how is the break command handled?

1 Like
2

Does CTRL+C not work?

3

Nope. Tried the whole control alphabet.

But that little ‘x’ in the corner works :wink:

4

Also, if

Threads.@spawn f(true)

Ctrl-D cant do its thing either.
This in a windows laptop.

On a Linux machine Ctrl-Z stops Julia and drops back to the shell.

5

IIRC the keyboard interrupt (always been Ctrl+C for me on Windows) needs something to work gracefully on Windows. Yielding to the task scheduler (which many functions like sleep do) is one thing, but it’s not everything. For me, spamming Ctrl+C does eventually force a SIGINT and interrupt.

julia> while true sleep(1) end # Ctrl+C works first try
ERROR: InterruptException:
...

julia> while true Libc.systemsleep(1) end # non-yielding sleep, need spamming
WARNING: Force throwing a SIGINT
ERROR: InterruptException:
...

julia> while true end
WARNING: Force throwing a SIGINT
ERROR: InterruptException:
...

But this is on v1.11.4, haven’t tried 1.12.