repl 3.6.4-RC1, 3.6.3, 2.13.15, 2.13.16 gives error when exit with Ctrl+D or :quit

[bjornregnell]

Compiler version

Scala 3.6.3, 2.13.15, 2.13.16 under Ubuntu 22.04

Minimized code

$ uname -v
#49~22.04.1-Ubuntu SMP PREEMPT_DYNAMIC Wed Nov  6 17:42:15 UTC 2
bjornr@bjornix:~
$ scala -S 3.6.3
Welcome to Scala 3.6.3 (21.0.5, Java OpenJDK 64-Bit Server VM).
Type in expressions for evaluation. Or try :help.
                                                                                
scala> 
stty: 'standard input': unable to perform all requested operations
bjornr@bjornix:~
$ scala -S 2.13.16
Downloading Scala 2.13.16 compiler
Downloading Scala 2.13.16 bridge
Welcome to Scala 2.13.16 (OpenJDK 64-Bit Server VM, Java 21.0.5).
Type in expressions for evaluation. Or try :help.

scala> 
:quit
stty: 'standard input': unable to perform all requested operations
bjornr@bjornix:~
$ scala -S 2.13.15
Welcome to Scala 2.13.15 (OpenJDK 64-Bit Server VM, Java 21.0.5).
Type in expressions for evaluation. Or try :help.

scala> 
:quit
stty: 'standard input': unable to perform all requested operations
bjornr@bjornix:~
$ 

Output

stty: 'standard input': unable to perform all requested operations

Expectation

No error.

[bjornregnell]

It does work for 2.13.13 and 3.6.2

[SethTisue]

Scala 2.13.14 was when we upgraded JLine from 3.24 to 3.25 (scala/scala#10717); Scala 2.13.16 has JLine 3.27.1

but it's puzzling that that doesn't seem to line up with what you're seeing on the Scala 3 side. 3.6.2 had JLine 3.27.0, 3.6.3 has JLine 3.27.1

are there other Linux users watching the repo who could report if they see this on the same set of versions? it's possible this is somehow dependent on some detail of how Björn's terminal is configured

I'm also curious if it only happens when the REPL is launched by Scala-CLI, or whether it also happens using the old runner (in either 2 or 3)

I don't see anything relevant at https://github.com/jline/jline3

[OndrejSpanel]

I have tried this on fresh installed Ubuntu 24 in WSL with Java 17, got no error both with Ctrl-D and :quit:

ondra@OndronWork:~$ scala
Warning: JAVA_HOME environment variable is not set.
Welcome to Scala 3.6.3 (17.0.13, Java OpenJDK 64-Bit Server VM).
Type in expressions for evaluation. Or try :help.

scala> :quit
ondra@OndronWork:~$

[bjornregnell]

I don't have any special settings in my terminal but it seems specific to Ubuntu 22.04, as I don't get it on 18.04 or 20.04. And I don't get the warning that JAVA_HOME is not set that @OndrejSpanel got.

[bjornregnell]

Anyone with Ubuntu 22.04 that gets the same error when quitting the 3.6.3 repl?

stty: 'standard input': unable to perform all requested operations

but it's puzzling that that doesn't seem to line up with what you're seeing on the Scala 3 side. 3.6.2 had JLine 3.27.0, 3.6.3 has JLine 3.27.1

@SethTisue Maybe I was switching machines and confusing version. I'll verify again when I get to my 22.04 machine (currently out of office).

[SethTisue]

@bjornregnell thanks. it would be good to have additional confirmation, since I really would expect it to stem from the JLine version

[spamegg1]

are there other Linux users watching the repo who could report if they see this on the same set of versions? it's possible this is somehow dependent on some detail of how Björn's terminal is configured

I cannot reproduce on 3.6.3 or 2.13.16. Ubuntu 24.04 using zsh on Kitty terminal emulator. Also cannot reproduce using bash on Gnome Terminal emulator.

[philwalk]

For what it's worth, the following may not be related, although it shares an stty error message

I've been meaning to file a bug on what appears to be a related issue, caused by calling stty on a non-terminal.
It only seems to occur for me with Windows shell environments, like cygwin, git-bash, msys64, etc.

Here's a script that produces a similar error message:

#!/opt/scala3-3.6.3-x86_64-pc-win32/bin/scala
import scala.collection.Iterator

val lines = for {
  line <- Iterator.continually(scala.io.StdIn.readLine()).takeWhile( _ != null )
  if line != null
} yield line
printf("%d lines\n", lines.size)

Here's how to demonstrate the error message:

philwalk@d5 MINGW64 /opt/ue
# ls -l | jsrc/readStdin.sc
stty: 'standard input': Inappropriate ioctl for device
Compiling project (Scala 3.6.3, JVM (17))
Compiled project (Scala 3.6.3, JVM (17))
837 lines

A fix is to add a tty check to bin/common or to /opt/scala3-3.6.3-x86_64-pc-win32/libexec/common-shared:

#!/usr/bin/env bash

if [ -e /usr/bin/tty -a "`tty`" != "not a tty" -a ! -p /dev/stdin ]; then
  isterminal=1
  # save terminal settings
  saved_stty=$(stty -g 2>/dev/null)
  # clear on error so we don't later try to restore them
  if [[ ! $? ]]; then
    saved_stty=""
  fi
else
  isterminal=0
fi

I believe this is a long-standing scala3 bug.

[bjornregnell]

I have three different machines with Ubuntu 22.04 on which it surfaces (but all my 18.04 and 20.04 machines give no error (I have too many machines...)).

I'm using the standard terminal and the terminal is not tweaked with any special setting. You can see all version of Scala 3 and 2 that I tried and it works again back in
3.6.2 and 2.13.13. Hope this helps? @SethTisue

[OndrejSpanel]

I confirm the issue on a freshly installed Ubuntu 22 on VMWare Workstation virtual machine (Windows 11 x64 host):

ondra@ondron-ubuntu:~$ uname -v
#52~22.04.1-Ubuntu SMP PREEMPT_DYNAMIC Mon Dec  9 15:00:52 UTC 2
ondra@ondron-ubuntu:~$ scala -S 3.6.3
Welcome to Scala 3.6.3 (21.0.6, Java OpenJDK 64-Bit Server VM).
Type in expressions for evaluation. Or try :help.
                                                                                
scala> 
stty: 'standard input': unable to perform all requested operations
ondra@ondron-ubuntu:~$ 

The issue is not seen with 3.6.2 - but this version shows a warning about terminal provider jna to me:

ondra@ondron-ubuntu:~$ scala -S 3.6.2
Jan 24, 2025 11:44:20 AM org.jline.utils.Log logr
WARNING: The terminal provider jna has been deprecated, check your configuration. This warning can be disabled by setting the system property org.jline.terminal.disableDeprecatedProviderWarning to true.
Welcome to Scala 3.6.2 (21.0.6, Java OpenJDK 64-Bit Server VM).
Type in expressions for evaluation. Or try :help.
                                                                                
scala> 
ondra@ondron-ubuntu:~$