Building server with Temurin fails

[metayan]

• I have read the FAQ.
• I have searched in existing issues.

Environment

• OS: macOS 10.15.7 with Homebrew
• scrcpy version: 2.4 and dev
• installation method: manual build

java --version
openjdk 21.0.3 2024-04-16 LTS
OpenJDK Runtime Environment Temurin-21.0.3+9 (build 21.0.3+9-LTS)
OpenJDK 64-Bit Server VM Temurin-21.0.3+9 (build 21.0.3+9-LTS, mixed mode)

Trying to build the server with Temurin fails.
Not clear if it should be possible (or if it reveals a scrcpy bug or a Temurin bug).

Might not be an issue, but reporting it might help someone find this build failure cause faster. ;)

Idea
Could be helpful to add java --version to server/build_without_gradle.sh.

./server/build_without_gradle.sh
Platform: android-34
Build-tools: 34.0.0
Build dir: /Users/Shared/src/scm/android/scrcpy/build_manual
Generating java from aidl...
Compiling java sources...
warning: [options] source value 8 is obsolete and will be removed in a future release
warning: [options] target value 8 is obsolete and will be removed in a future release
warning: [options] To suppress warnings about obsolete options, use -Xlint:-options.
3 warnings
Dexing...
Error in com/genymobile/scrcpy/AudioCodec.class:
java.lang.NullPointerException: Cannot invoke "String.length()" because "<parameter1>" is null
Compilation failed with an internal error.
Exception in thread "main" java.lang.RuntimeException: com.android.tools.r8.CompilationFailedException: Compilation failed to complete, origin: com/genymobile/scrcpy/AudioCodec.class
        at com.android.tools.r8.utils.R0.a(R8_8.2.2-dev_53a55043254cc5be8ef500331bba25d1b4ca4bc2cd66c555d4358bf672a1f10a:126)
        at com.android.tools.r8.D8.main(R8_8.2.2-dev_53a55043254cc5be8ef500331bba25d1b4ca4bc2cd66c555d4358bf672a1f10a:5)
Caused by: com.android.tools.r8.CompilationFailedException: Compilation failed to complete, origin: com/genymobile/scrcpy/AudioCodec.class
        at Version.fakeStackEntry(Version_8.2.2-dev.java:0)
        at com.android.tools.r8.M.a(R8_8.2.2-dev_53a55043254cc5be8ef500331bba25d1b4ca4bc2cd66c555d4358bf672a1f10a:5)
        at com.android.tools.r8.utils.R0.a(R8_8.2.2-dev_53a55043254cc5be8ef500331bba25d1b4ca4bc2cd66c555d4358bf672a1f10a:81)
        at com.android.tools.r8.utils.R0.a(R8_8.2.2-dev_53a55043254cc5be8ef500331bba25d1b4ca4bc2cd66c555d4358bf672a1f10a:32)
        at com.android.tools.r8.utils.R0.a(R8_8.2.2-dev_53a55043254cc5be8ef500331bba25d1b4ca4bc2cd66c555d4358bf672a1f10a:31)
        at com.android.tools.r8.utils.R0.b(R8_8.2.2-dev_53a55043254cc5be8ef500331bba25d1b4ca4bc2cd66c555d4358bf672a1f10a:2)
        at com.android.tools.r8.D8.a(R8_8.2.2-dev_53a55043254cc5be8ef500331bba25d1b4ca4bc2cd66c555d4358bf672a1f10a:26)
        at com.android.tools.r8.D8.b(R8_8.2.2-dev_53a55043254cc5be8ef500331bba25d1b4ca4bc2cd66c555d4358bf672a1f10a:13)
        at com.android.tools.r8.D8.a(R8_8.2.2-dev_53a55043254cc5be8ef500331bba25d1b4ca4bc2cd66c555d4358bf672a1f10a:24)
        at com.android.tools.r8.utils.R0.a(R8_8.2.2-dev_53a55043254cc5be8ef500331bba25d1b4ca4bc2cd66c555d4358bf672a1f10a:113)
        ... 1 more
Caused by: java.lang.NullPointerException: Cannot invoke "String.length()" because "<parameter1>" is null
        at com.android.tools.r8.graph.u2.<init>(R8_8.2.2-dev_53a55043254cc5be8ef500331bba25d1b4ca4bc2cd66c555d4358bf672a1f10a:5)
        at com.android.tools.r8.graph.p1.c(R8_8.2.2-dev_53a55043254cc5be8ef500331bba25d1b4ca4bc2cd66c555d4358bf672a1f10a:3)
        at com.android.tools.r8.graph.Q3.b(R8_8.2.2-dev_53a55043254cc5be8ef500331bba25d1b4ca4bc2cd66c555d4358bf672a1f10a:10)
        at com.android.tools.r8.internal.Ga.a(R8_8.2.2-dev_53a55043254cc5be8ef500331bba25d1b4ca4bc2cd66c555d4358bf672a1f10a:873)
        at com.android.tools.r8.graph.T3.a(R8_8.2.2-dev_53a55043254cc5be8ef500331bba25d1b4ca4bc2cd66c555d4358bf672a1f10a:44)
        at com.android.tools.r8.utils.R0.a(R8_8.2.2-dev_53a55043254cc5be8ef500331bba25d1b4ca4bc2cd66c555d4358bf672a1f10a:129)
        at com.android.tools.r8.utils.R0.a(R8_8.2.2-dev_53a55043254cc5be8ef500331bba25d1b4ca4bc2cd66c555d4358bf672a1f10a:130)
        at com.android.tools.r8.utils.R0.a(R8_8.2.2-dev_53a55043254cc5be8ef500331bba25d1b4ca4bc2cd66c555d4358bf672a1f10a:128)
        at com.android.tools.r8.graph.T3.b(R8_8.2.2-dev_53a55043254cc5be8ef500331bba25d1b4ca4bc2cd66c555d4358bf672a1f10a:2)
        at com.android.tools.r8.dex.a.a(R8_8.2.2-dev_53a55043254cc5be8ef500331bba25d1b4ca4bc2cd66c555d4358bf672a1f10a:27)
        at java.base/java.util.concurrent.ForkJoinTask$AdaptedCallable.exec(ForkJoinTask.java:1456)
        at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:387)
        at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1312)
        at java.base/java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1843)
        at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1808)
        at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:188)
        Suppressed: java.lang.RuntimeException: java.util.concurrent.ExecutionException: com.android.tools.r8.utils.T0: java.lang.NullPointerException: Cannot invoke "String.length()" because "<parameter1>" is null
                at com.android.tools.r8.dex.c.a(R8_8.2.2-dev_53a55043254cc5be8ef500331bba25d1b4ca4bc2cd66c555d4358bf672a1f10a:60)
                at com.android.tools.r8.dex.c.a(R8_8.2.2-dev_53a55043254cc5be8ef500331bba25d1b4ca4bc2cd66c555d4358bf672a1f10a:9)
                at com.android.tools.r8.dex.c.a(R8_8.2.2-dev_53a55043254cc5be8ef500331bba25d1b4ca4bc2cd66c555d4358bf672a1f10a:8)
                at com.android.tools.r8.D8.a(R8_8.2.2-dev_53a55043254cc5be8ef500331bba25d1b4ca4bc2cd66c555d4358bf672a1f10a:29)
                at com.android.tools.r8.D8.d(R8_8.2.2-dev_53a55043254cc5be8ef500331bba25d1b4ca4bc2cd66c555d4358bf672a1f10a:17)
                at com.android.tools.r8.D8.c(R8_8.2.2-dev_53a55043254cc5be8ef500331bba25d1b4ca4bc2cd66c555d4358bf672a1f10a:1)
                at com.android.tools.r8.utils.R0.a(R8_8.2.2-dev_53a55043254cc5be8ef500331bba25d1b4ca4bc2cd66c555d4358bf672a1f10a:28)
                at com.android.tools.r8.utils.R0.b(R8_8.2.2-dev_53a55043254cc5be8ef500331bba25d1b4ca4bc2cd66c555d4358bf672a1f10a:2)
                at com.android.tools.r8.D8.a(R8_8.2.2-dev_53a55043254cc5be8ef500331bba25d1b4ca4bc2cd66c555d4358bf672a1f10a:26)
                at com.android.tools.r8.D8.b(R8_8.2.2-dev_53a55043254cc5be8ef500331bba25d1b4ca4bc2cd66c555d4358bf672a1f10a:13)
                at com.android.tools.r8.D8.a(R8_8.2.2-dev_53a55043254cc5be8ef500331bba25d1b4ca4bc2cd66c555d4358bf672a1f10a:24)
                at com.android.tools.r8.utils.R0.a(R8_8.2.2-dev_53a55043254cc5be8ef500331bba25d1b4ca4bc2cd66c555d4358bf672a1f10a:113)
                at com.android.tools.r8.D8.main(R8_8.2.2-dev_53a55043254cc5be8ef500331bba25d1b4ca4bc2cd66c555d4358bf672a1f10a:5)
        Caused by: java.util.concurrent.ExecutionException: com.android.tools.r8.utils.T0: java.lang.NullPointerException: Cannot invoke "String.length()" because "<parameter1>" is null
                at java.base/java.util.concurrent.ForkJoinTask.reportExecutionException(ForkJoinTask.java:581)
                at java.base/java.util.concurrent.ForkJoinTask.get(ForkJoinTask.java:993)
                at com.android.tools.r8.utils.d3.a(R8_8.2.2-dev_53a55043254cc5be8ef500331bba25d1b4ca4bc2cd66c555d4358bf672a1f10a:64)
                at com.android.tools.r8.dex.c.a(R8_8.2.2-dev_53a55043254cc5be8ef500331bba25d1b4ca4bc2cd66c555d4358bf672a1f10a:41)
                ... 12 more
        Caused by: com.android.tools.r8.utils.T0: java.lang.NullPointerException: Cannot invoke "String.length()" because "<parameter1>" is null
                at com.android.tools.r8.utils.R0.a(R8_8.2.2-dev_53a55043254cc5be8ef500331bba25d1b4ca4bc2cd66c555d4358bf672a1f10a:149)
                at com.android.tools.r8.utils.R0.a(R8_8.2.2-dev_53a55043254cc5be8ef500331bba25d1b4ca4bc2cd66c555d4358bf672a1f10a:128)
                at com.android.tools.r8.graph.T3.b(R8_8.2.2-dev_53a55043254cc5be8ef500331bba25d1b4ca4bc2cd66c555d4358bf672a1f10a:2)
                at com.android.tools.r8.dex.a.a(R8_8.2.2-dev_53a55043254cc5be8ef500331bba25d1b4ca4bc2cd66c555d4358bf672a1f10a:27)
                at java.base/java.util.concurrent.ForkJoinTask$AdaptedCallable.exec(ForkJoinTask.java:1456)
                at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:387)
                at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1312)
                at java.base/java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1843)
                at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1808)
                at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:188)
        Caused by: [CIRCULAR REFERENCE: java.lang.NullPointerException: Cannot invoke "String.length()" because "<parameter1>" is null]

Solution
Switching back to the openjdk installed by Homebrew.

java --version
openjdk 19.0.1 2022-10-18
OpenJDK Runtime Environment Homebrew (build 19.0.1)
OpenJDK 64-Bit Server VM Homebrew (build 19.0.1, mixed mode, sharing)

./server/build_without_gradle.sh 
Platform: android-34
Build-tools: 34.0.0
Build dir: /Users/Shared/src/scm/android/scrcpy/build_manual
Generating java from aidl...
Compiling java sources...
Dexing...
Server generated in /Users/Shared/src/scm/android/scrcpy/build_manual/scrcpy-server