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scala-cli -e 'println("hello")' > /dev/null throws java.io.IOException #3481

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philwalk opened this issue Feb 6, 2025 · 5 comments
Open

scala-cli -e 'println("hello")' > /dev/null throws java.io.IOException #3481

philwalk opened this issue Feb 6, 2025 · 5 comments
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bug Something isn't working windows Windows-specific issues

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@philwalk
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philwalk commented Feb 6, 2025

Version(s)

# scala-cli --version
Scala CLI version: 1.6.1
Scala version (default): 3.6.3

Describe the bug
Redirecting stdout to /dev/null throws an Exception.

java.io.IOException: Error enabling ANSI output: GetConsoleMode error 6
  coursier.jniutils.WindowsAnsiTerminal.enableAnsiOutput(WindowsAnsiTerminal.java:25)
  scala.cli.ScalaCli$.main0(ScalaCli.scala:317)
  scala.cli.ScalaCli$.main(ScalaCli.scala:124)
  scala.cli.ScalaCli.main(ScalaCli.scala)

To Reproduce
hello.sc:

#!/usr/bin/env -S scala-cli shebang
printf("%s\n", "hello")
./hello.sc
hello
scala-cli -e 'println("hello")'  > /dev/null
Error: java.io.IOException: Error enabling ANSI output: GetConsoleMode error 6
For more details, please see 'C:\opt\ue\.scala-build\stacktraces\1738864818-3992728134502856876.log'

Should not throw an exception.
@philwalk philwalk added the bug Something isn't working label Feb 6, 2025
@philwalk philwalk changed the title scala-cli -e 'println("hello")' > /dev/null throws java.io.IOException: Error enabling ANSI output: GetConsoleMode error 6 scala-cli -e 'println("hello")' > /dev/null throws java.io.IOException: Error enabling ANSI output: GetConsoleMode error 6 Feb 6, 2025
@philwalk
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philwalk commented Feb 6, 2025 •
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This may be related. When piping the output rather than redirecting, bloop crashes.
The command line was a typo, but perhaps the output is useful, or maybe it's unrelated.

hello.sc | /dev/null
Compiling project (Scala 3.6.3, JVM (17))
Compiled project (Scala 3.6.3, JVM (17))
[E] Exiting BSP server with Connection reset
Bloop 'bsp' command exited with code 1. Something may be wrong with the current configuration.
Running the clean sub-command to clear the working directory and remove caches might help.
If the error persists, please report the issue as a bug and attach a log with increased verbosity by passing -v -v -v.

@philwalk philwalk changed the title scala-cli -e 'println("hello")' > /dev/null throws java.io.IOException: Error enabling ANSI output: GetConsoleMode error 6 scala-cli -e 'println("hello")' > /dev/null throws java.io.IOException Feb 6, 2025
@Gedochao
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Gedochao commented Feb 10, 2025 •
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@philwalk am I guessing correctly the reproduction is Windows-specific? I can't seem to be able to reproduce on a Mac.
Also, cc @tgodzik for the weird Bloop failure 🤔

@Gedochao Gedochao added windows Windows-specific issues needs reproduction and removed needs reproduction labels Feb 10, 2025
@philwalk
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philwalk commented Feb 11, 2025 •
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@philwalk am I guessing correctly the reproduction is Windows-specific? I can't seem to be able to reproduce on a Mac. Also, cc @tgodzik for the weird Bloop failure 🤔

I assume that @tgodzik is notified when he is mentioned like this.
EDITED:

I thought so [that it's Windows-specific] because I didn't see the problem when I did a quick check in a WSL bash session.

This is apparently not a Windows-only problem, although it doesn't manifest in exactly the same way. In Windows Terminal I get this:

# clisrc/hello.sc > /dev/null
Error: java.io.IOException: Error enabling ANSI output: GetConsoleMode error 6
For more details, please see 'C:\opt\ue\.scala-build\stacktraces\1739285187-7626986499591343828.log'

# cat 'C:\opt\ue\.scala-build\stacktraces\1739285187-7626986499591343828.log'
java.io.IOException: Error enabling ANSI output: GetConsoleMode error 6
  coursier.jniutils.WindowsAnsiTerminal.enableAnsiOutput(WindowsAnsiTerminal.java:25)
  scala.cli.ScalaCli$.main0(ScalaCli.scala:317)
  scala.cli.ScalaCli$.main(ScalaCli.scala:124)
  scala.cli.ScalaCli.main(ScalaCli.scala)

See below for the WSL bash session crash and stacktrace.

@philwalk
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philwalk commented Feb 11, 2025 •
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Turns out that it also crashes in a Linux bash session, and even with a valid command line:

:/opt/ue$ clisrc/hello.sc > /dev/null
[E] Caught bloop.data.Project$ProjectReadException: Failed to load project from /opt/ue/clisrc/.scala-build/.bloop/clisrc_eac7d69449-afeaabc44b.json
Bloop 'bsp' command exited with code 1. Something may be wrong with the current configuration.
Running the clean sub-command to clear the working directory and remove caches might help.
If the error persists, please report the issue as a bug and attach a log with increased verbosity by passing -v -v -v.
Error: java.lang.RuntimeException: Bloop BSP connection in /home/philwalk/.cache/scalacli/bsp-sockets/proc-340 was unexpectedly closed or bloop didn't start.
For more details, please see '/opt/ue/clisrc/.scala-build/stacktraces/1739284966-4775558018048031860.log'
(base) philwalk@d5:/opt/ue$

Here's the stacktrace:

java.lang.RuntimeException: Bloop BSP connection in /home/philwalk/.cache/scalacli/bsp-sockets/proc-340 was unexpectedly closed or bloop didn't start.
  scala.sys.package$.error(package.scala:27)
  bloop.rifle.internal.Operations$$anon$1.openSocket(Operations.scala:426)
  bloop.rifle.BloopServer$.create$1(BloopServer.scala:128)
  bloop.rifle.BloopServer$.connect(BloopServer.scala:144)
  bloop.rifle.BloopServer$.bsp(BloopServer.scala:167)
  bloop.rifle.BloopServer$.buildServer(BloopServer.scala:186)
  scala.build.compiler.BloopCompilerMaker.$anonfun$1(BloopCompilerMaker.scala:48)
  scala.build.compiler.BloopCompiler.<init>(BloopCompiler.scala:15)
  scala.build.compiler.BloopCompilerMaker.$anonfun$2(BloopCompilerMaker.scala:51)
  scala.util.Try$.apply(Try.scala:217)
  scala.build.compiler.BloopCompilerMaker.create(BloopCompilerMaker.scala:51)
  scala.build.compiler.ScalaCompilerMaker.withCompiler(ScalaCompilerMaker.scala:34)
  scala.build.compiler.ScalaCompilerMaker.withCompiler$(ScalaCompilerMaker.scala:9)
  scala.build.compiler.BloopCompilerMaker.withCompiler(BloopCompilerMaker.scala:14)
  scala.build.Build$.build$$anonfun$3(Build.scala:611)
  scala.build.EitherCps$Helper.apply(EitherCps.scala:19)
  scala.build.Build$.build(Build.scala:596)
  scala.cli.commands.run.Run$.runCommand(Run.scala:334)
  scala.cli.commands.shebang.Shebang$.runCommand(Shebang.scala:33)
  scala.cli.commands.shebang.Shebang$.runCommand(Shebang.scala:26)
  scala.cli.commands.ScalaCommand.run(ScalaCommand.scala:401)
  scala.cli.commands.ScalaCommand.run(ScalaCommand.scala:382)
  caseapp.core.app.CaseApp.main(CaseApp.scala:166)
  scala.cli.commands.ScalaCommand.main(ScalaCommand.scala:367)
  caseapp.core.app.CommandsEntryPoint.main(CommandsEntryPoint.scala:370)
  scala.cli.ScalaCliCommands.main(ScalaCliCommands.scala:125)
  scala.cli.ScalaCli$.main0(ScalaCli.scala:320)
  scala.cli.ScalaCli$.main(ScalaCli.scala:124)
  scala.cli.ScalaCli.main(ScalaCli.scala)

@philwalk
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philwalk commented Feb 11, 2025 •
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@tgodzik

More info on Windows/Linux versions of the problem:
This command line fails on Windows in a MSYS64 bash session:

scala -e "println("""hello""")" > /dev/null

And also in a CMD.EXE session, whether CMD.EXE alone, or running in Windows Terminal:

It's not problem when STDOUT is not redirected, or is redirected to a file

C:\Windows\System32>scala-cli.exe -e "println("""hello""")"
Compiling project (Scala 3.6.3, JVM (11))
Compiled project (Scala 3.6.3, JVM (11))
hello

C:\Windows\System32>scala-cli.exe -e "println("""hello""")" > s0
Compiling project (Scala 3.6.3, JVM (11))
Compiled project (Scala 3.6.3, JVM (11))
C:\Windows\System32>type s0
hello

The problem occurs when redirecting to NUL

C:\Windows\System32>scala-cli.exe -e "println("""hello""")" > NUL
Error: java.io.IOException: Error enabling ANSI output: GetConsoleMode error 6
For more details, please see 'C:\Windows\System32\.scala-build\stacktraces\1739296010-9469441151690933143.log'

C:\Windows\System32>type C:\Windows\System32\.scala-build\stacktraces\1739296010-9469441151690933143.log
java.io.IOException: Error enabling ANSI output: GetConsoleMode error 6
  coursier.jniutils.WindowsAnsiTerminal.enableAnsiOutput(WindowsAnsiTerminal.java:25)
  scala.cli.ScalaCli$.main0(ScalaCli.scala:317)
  scala.cli.ScalaCli$.main(ScalaCli.scala:124)
  scala.cli.ScalaCli.main(ScalaCli.scala)

Unable to reproduce the problem in WSL Ubuntu with this particular command line:

(base) philwalk@d5:~$ scala -e "println(\"hello\")"
Compiling project (Scala 3.6.3, JVM (17))
Compiled project (Scala 3.6.3, JVM (17))
hello

However, in WSL there's a bloop crash when running the following short script, unrelated to redirection:

#!/usr/bin/env -S scala-cli shebang
//> using scala 3.4.3
printf("scriptPath: [%s]\n", scriptPath)
sys.props("java.class.path").split(psep).foreach { println }
def psep: String = sys.props("path.separator")
(base) philwalk@d5:/opt/ue$ clisrc/hello.sc
Starting compilation server
[E] Caught bloop.data.Project$ProjectReadException: Failed to load project from /opt/ue/clisrc/.scala-build/.bloop/clisrc_eac7d69449-afeaabc44b.json
Bloop 'bsp' command exited with code 1. Something may be wrong with the current configuration.
Running the clean sub-command to clear the working directory and remove caches might help.
If the error persists, please report the issue as a bug and attach a log with increased verbosity by passing -v -v -v.
Error: java.lang.RuntimeException: Bloop BSP connection in /home/philwalk/.cache/scalacli/bsp-sockets/proc-1864 was unexpectedly closed or bloop didn't start.
For more details, please see '/opt/ue/clisrc/.scala-build/stacktraces/1739296852-7851145895565982827.log'
(base) philwalk@d5:/opt/ue$
(base) philwalk@d5:/opt/ue$ cat  '/opt/ue/clisrc/.scala-build/stacktraces/1739296852-7851145895565982827.log'
java.lang.RuntimeException: Bloop BSP connection in /home/philwalk/.cache/scalacli/bsp-sockets/proc-1864 was unexpectedly closed or bloop didn't start.
  scala.sys.package$.error(package.scala:27)
  bloop.rifle.internal.Operations$$anon$1.openSocket(Operations.scala:426)
  bloop.rifle.BloopServer$.create$1(BloopServer.scala:128)
  bloop.rifle.BloopServer$.connect(BloopServer.scala:144)
  bloop.rifle.BloopServer$.bsp(BloopServer.scala:167)
  bloop.rifle.BloopServer$.buildServer(BloopServer.scala:186)
  scala.build.compiler.BloopCompilerMaker.$anonfun$1(BloopCompilerMaker.scala:48)
  scala.build.compiler.BloopCompiler.<init>(BloopCompiler.scala:15)
  scala.build.compiler.BloopCompilerMaker.$anonfun$2(BloopCompilerMaker.scala:51)
  scala.util.Try$.apply(Try.scala:217)
  scala.build.compiler.BloopCompilerMaker.create(BloopCompilerMaker.scala:51)
  scala.build.compiler.ScalaCompilerMaker.withCompiler(ScalaCompilerMaker.scala:34)
  scala.build.compiler.ScalaCompilerMaker.withCompiler$(ScalaCompilerMaker.scala:9)
  scala.build.compiler.BloopCompilerMaker.withCompiler(BloopCompilerMaker.scala:14)
  scala.build.Build$.build$$anonfun$3(Build.scala:611)
  scala.build.EitherCps$Helper.apply(EitherCps.scala:19)
  scala.build.Build$.build(Build.scala:596)
  scala.cli.commands.run.Run$.runCommand(Run.scala:334)
  scala.cli.commands.shebang.Shebang$.runCommand(Shebang.scala:33)
  scala.cli.commands.shebang.Shebang$.runCommand(Shebang.scala:26)
  scala.cli.commands.ScalaCommand.run(ScalaCommand.scala:401)
  scala.cli.commands.ScalaCommand.run(ScalaCommand.scala:382)
  caseapp.core.app.CaseApp.main(CaseApp.scala:166)
  scala.cli.commands.ScalaCommand.main(ScalaCommand.scala:367)
  caseapp.core.app.CommandsEntryPoint.main(CommandsEntryPoint.scala:370)
  scala.cli.ScalaCliCommands.main(ScalaCliCommands.scala:125)
  scala.cli.ScalaCli$.main0(ScalaCli.scala:320)
  scala.cli.ScalaCli$.main(ScalaCli.scala:124)
  scala.cli.ScalaCli.main(ScalaCli.scala)

This one clears up after doing scala-cli clean clisrc:

(base) philwalk@d5:/opt/ue$ scala-cli clean clisrc
(base) philwalk@d5:/opt/ue$ clisrc/hello.sc
Compiling project (Scala 3.4.3, JVM (17))
Compiled project (Scala 3.4.3, JVM (17))
scriptPath: [clisrc/hello.sc]
/opt/ue/clisrc/.scala-build/clisrc_8b89045a54-a30d5cd5b2/classes/main
/home/philwalk/.cache/coursier/v1/https/repo1.maven.org/maven2/org/scala-lang/scala3-library_3/3.4.3/scala3-library_3-3.4.3.jar
/home/philwalk/.cache/coursier/v1/https/repo1.maven.org/maven2/org/scala-lang/scala-library/2.13.12/scala-library-2.13.12.jar
(base) philwalk@d5:/opt/ue$

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