Build issue in terminal-ffm on Ubuntu 20.04

[dattasid]

I am seeing the following error when trying to build a freshly downloaded 3.24.1 source. What could be the issue?

JAVA_HOME set to JDK 21
PATH has $JAVA_HOME/bin as first element.

[ERROR] Tests run: 3, Failures: 0, Errors: 2, Skipped: 1, Time elapsed: 0.179 s <<< FAILURE! -- in org.jline.terminal.impl.ffm.FfmTest
[ERROR] org.jline.terminal.impl.ffm.FfmTest.testNewTerminalWithNull -- Time elapsed: 0.142 s <<< ERROR!
java.lang.ExceptionInInitializerError
	at org.jline.terminal.impl.ffm.FfmTerminalProvider.newTerminal(FfmTerminalProvider.java:83)
	at org.jline.terminal.impl.ffm.FfmTest.testNewTerminalWithNull(FfmTest.java:30)
	at java.base/java.lang.reflect.Method.invoke(Method.java:580)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1596)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1596)
Caused by: java.util.NoSuchElementException: No value present
	at java.base/java.util.Optional.get(Optional.java:143)
	at org.jline.terminal.impl.ffm.CLibrary.<clinit>(CLibrary.java:398)
	... 5 more

[ERROR] org.jline.terminal.impl.ffm.FfmTest.testNewTerminalNoNull -- Time elapsed: 0.007 s <<< ERROR!
java.lang.NoClassDefFoundError: Could not initialize class org.jline.terminal.impl.ffm.CLibrary
	at org.jline.terminal.impl.ffm.FfmTerminalProvider.newTerminal(FfmTerminalProvider.java:83)
	at org.jline.terminal.impl.ffm.FfmTest.testNewTerminalNoNull(FfmTest.java:47)
	at java.base/java.lang.reflect.Method.invoke(Method.java:580)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1596)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1596)
Caused by: java.lang.ExceptionInInitializerError: Exception java.util.NoSuchElementException: No value present [in thread "main"]
	at java.base/java.util.Optional.get(Optional.java:143)

System:
Linux HOSTNAME 5.4.17-<blah>.x86_64 #2 SMP DATE x86_64 x86_64 x86_64 GNU/Linux

$ java -version
openjdk version "21.0.1" 2023-10-17
OpenJDK Runtime Environment (build 21.0.1+12-29)
OpenJDK 64-Bit Server VM (build 21.0.1+12-29, mixed mode, sharing)

[gnodet]

This looks like the same problem with openpty method not being linked, see #896.

[dattasid]

This looks like the same problem with openpty method not being linked, see #896.

Is this currently a open issue? I only want to build the basic pure-java JLine, dont need the JNI or any native stuff. Is there a way to just build that via the build script ?

[dattasid]

Closed by mistake, clicked wrong button.

[gnodet]

This looks like the same problem with openpty method not being linked, see #896.

Is this currently a open issue? I only want to build the basic pure-java JLine, dont need the JNI or any native stuff. Is there a way to just build that via the build script ?

mvn package -DskipTests ?

[dattasid]

@gnodet Excuse my ignorance, what is FFM ?

[gnodet]

@gnodet Excuse my ignorance, what is FFM ?

https://docs.oracle.com/en/java/javase/21/core/foreign-function-and-memory-api.html

[dattasid]

I tested and the following fixes the issue:

    System.loadLibrary("util");
    SymbolLookup libld = SymbolLookup.loaderLookup();
    libld = libld.or(linker.defaultLookup());
    ...
    libld.find("openpty").get(),

[gnodet]

I've tried to reproduce the build problem on two VMs I have without any success... :-(
Linux HOSTNAME 5.19.6-100.fc35.x86_64 #1 SMP PREEMPT_DYNAMIC DATE x86_64 x86_64 x86_64 GNU/Linux
and
Linux HOSTNAME 6.1.10-100.fc36.aarch64 #1 SMP PREEMPT_DYNAMIC DATE aarch64 aarch64 aarch64 GNU/Linux

[cstamas]

@dattasid what OS/distro you are on?

[cstamas]

Cannot reproduce on
Linux HOSTNAME 6.6.6-200.fc39.x86_64 #1 SMP PREEMPT_DYNAMIC Mon Dec 11 17:29:08 UTC 2023 x86_64 GNU/Linux

[mattirn]

I have reproduced on

% uname -a
Linux HOSTNAME 5.4.0-169-generic #187-Ubuntu SMP Thu Nov 23 14:52:28 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux

 % lsb_release -a
No LSB modules are available.
Distributor ID:	Ubuntu
Description:	Ubuntu 20.04.6 LTS
Release:	20.04
Codename:	focal

[gnodet]

I have reproduced on

% uname -a
Linux HOSTNAME 5.4.0-169-generic #187-Ubuntu SMP Thu Nov 23 14:52:28 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux

% lsb_release -a
No LSB modules are available.
Distributor ID:	Ubuntu
Description:	Ubuntu 20.04.6 LTS
Release:	20.04
Codename:	focal

I've been able to reproduce it on Ubuntu 20.04 VM...

[dattasid]

I saw the issue on Oracle Linux 5.4.17-2136.318.7.1.el8uek.x86_64 .

[gnodet]

I have a fix for the FFM provider (see #918), however the exact same problem happen for Jansi et JNI provider (see #896) and things are a bit different, as those use a JNI library. A workaround for those it to define the environment variable LD_PRELOAD=/lib/aarch64-linux-gnu/libutil.so.1 or LD_PRELOAD=/lib/x86_64-linux-gnu/libutil.so.1 on Ubuntu 20.04.

I'm not sure why there's no libutil.so as the JVM is not able to load the library with System.loadLibrary() because the name is libutil.so.1 ...