Build issues

[topchyan]

Cloning into 'audiveris'...
Switched to a new branch 'development'
branch 'development' set up to track 'origin/development'.
Already up to date.

Configure project :app
hostOS: linux-x86_64
theMinJavaVersion: 21
theTessdataTag: 4.1.0

Configure project :schemas
theXsltTransformer: XsltProc

Task :app:clean UP-TO-DATE
Task :flatpak:clean UP-TO-DATE
Task :schemas:clean UP-TO-DATE
Task :windows-installer:clean UP-TO-DATE

BUILD SUCCESSFUL in 894ms
4 actionable tasks: 4 up-to-date

Configure project :app
hostOS: linux-x86_64
theMinJavaVersion: 21
theTessdataTag: 4.1.0

Configure project :schemas
theXsltTransformer: XsltProc

Task :app:git_build
programBuild: 3e1f524

Task :app:generateProgramId
> Task :app:compileJava FAILED

FAILURE: Build failed with an exception.

• What went wrong:
  Execution failed for task ':app:compileJava'.

error: invalid source release: 21

• Try:

Run with --stacktrace option to get the stack trace.
Run with --info or --debug option to get more log output.
Run with --scan to get full insights.
Get more help at https://help.gradle.org.

BUILD FAILED in 1s
3 actionable tasks: 3 executed

Configure project :app
hostOS: linux-x86_64
theMinJavaVersion: 21
theTessdataTag: 4.1.0

Configure project :schemas
theXsltTransformer: XsltProc

Task :app:git_build
programBuild: 3e1f524

Task :app:generateProgramId
> Task :app:compileJava FAILED

FAILURE: Build failed with an exception.

• What went wrong:
  Execution failed for task ':app:compileJava'.

error: invalid source release: 21

• Try:

Run with --stacktrace option to get the stack trace.
Run with --info or --debug option to get more log output.
Run with --scan to get full insights.
Get more help at https://help.gradle.org.

BUILD FAILED in 1s
3 actionable tasks: 3 executed

Exit code: 1

[hbitteur]

error: invalid source release: 21

Sounds like you have a too old Java version, not able to support the 21 version.
Please check with:

java -version

[topchyan]

Configure project :app
hostOS: linux-x86_64
targetOS: linux-x86_64
theMinJavaVersion: 21
version: 5.4
tag: 5.4
theTessdataTag: 4.1.0

Configure project :schemas
theXsltTransformer: XsltProc

Task :app:git_build
programBuild: c664e2b

Task :app:compileJava FAILED

FAILURE: Build failed with an exception.

• What went wrong:
  Execution failed for task ':app:compileJava'.

error: invalid source release: 21

• Try:

Run with --stacktrace option to get the stack trace.
Run with --info or --debug option to get more log output.
Run with --scan to get full insights.
Get more help at https://help.gradle.org.

BUILD FAILED in 15s
3 actionable tasks: 3 executed

Configure project :app
hostOS: linux-x86_64
targetOS: linux-x86_64
theMinJavaVersion: 21
version: 5.4
tag: 5.4
theTessdataTag: 4.1.0

Configure project :schemas
theXsltTransformer: XsltProc

Task :app:git_build
programBuild: c664e2b

Task :app:compileJava FAILED

FAILURE: Build failed with an exception.

• What went wrong:
  Execution failed for task ':app:compileJava'.

error: invalid source release: 21

• Try:

Run with --stacktrace option to get the stack trace.
Run with --info or --debug option to get more log output.
Run with --scan to get full insights.
Get more help at https://help.gradle.org.

BUILD FAILED in 1s
3 actionable tasks: 3 executed

[hbitteur]

Version 5.4 has just been released.
Both master and development branches now require Java 21.