Android Question Target 30> 33

Marco Nissen · Sep 30, 2023

Hi

I have to switch to 33 and am facing one issue where I can't find any solution

In the folder, one B4AMenuItemsClickListener is generated for most items, so would be good to know what causes the dexer to throw an error or if I can configure the dexer in a different way

Thank you
Marco

B4X:

Dex code    Error
Error in C:\Development\stash2go.android\Objects\bin\classes\com\wurzelkraut\Stash2Go\addphoto$B4AMenuItemsClickListener.class:
java.lang.NullPointerException: Cannot invoke "String.length()" because "<parameter1>" is null
Compilation failed with an internal error.
Exception in thread "main" java.lang.RuntimeException: com.android.tools.r8.CompilationFailedException: Compilation failed to complete, origin: C:\Development\stash2go.android\Objects\bin\classes\com\wurzelkraut\Stash2Go\addphoto$B4AMenuItemsClickListener.class
    at com.android.tools.r8.internal.vj.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:98)
    at com.android.tools.r8.D8.main(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:4)
Caused by: com.android.tools.r8.CompilationFailedException: Compilation failed to complete, origin: C:\Development\stash2go.android\Objects\bin\classes\com\wurzelkraut\Stash2Go\addphoto$B4AMenuItemsClickListener.class
    at Version.fakeStackEntry(Version_3.3.20-dev+aosp1.java:0)
    at com.android.tools.r8.internal.vj.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:75)
    at com.android.tools.r8.internal.vj.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:28)
    at com.android.tools.r8.internal.vj.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:27)
    at com.android.tools.r8.internal.vj.b(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:2)
    at com.android.tools.r8.D8.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:22)
    at com.android.tools.r8.D8.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:17)
    at com.android.tools.r8.internal.vj.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:85)
    ... 1 more
Caused by: java.lang.NullPointerException: Cannot invoke "String.length()" because "<parameter1>" is null
    at com.android.tools.r8.graph.d1.<init>(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:5)
    at com.android.tools.r8.graph.v0.b(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:12)
    at com.android.tools.r8.graph.w2.b(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:9)
    at com.android.tools.r8.internal.La.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:873)
    at com.android.tools.r8.graph.x2.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:30)
    at com.android.tools.r8.internal.vj.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:101)
    at com.android.tools.r8.internal.vj.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:102)
    at com.android.tools.r8.internal.vj.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:100)
    at com.android.tools.r8.graph.x2.b(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:2)
    at com.android.tools.r8.dex.a.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:26)
    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.internal.xj: java.lang.NullPointerException: Cannot invoke "String.length()" because "<parameter1>" is null
        at com.android.tools.r8.dex.b.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:107)
        at com.android.tools.r8.dex.b.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:28)
        at com.android.tools.r8.D8.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:25)
        at com.android.tools.r8.D8.d(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:609)
        at com.android.tools.r8.D8.c(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:1)
        at com.android.tools.r8.internal.vj.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:24)
        at com.android.tools.r8.internal.vj.b(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:2)
        at com.android.tools.r8.D8.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:22)
        at com.android.tools.r8.D8.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:17)
        at com.android.tools.r8.internal.vj.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:85)
        at com.android.tools.r8.D8.main(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:4)
    Caused by: java.util.concurrent.ExecutionException: com.android.tools.r8.internal.xj: 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.C.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:56)
        at com.android.tools.r8.dex.b.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:88)
        ... 10 more
    Caused by: com.android.tools.r8.internal.xj: java.lang.NullPointerException: Cannot invoke "String.length()" because "<parameter1>" is null
        at com.android.tools.r8.internal.xj.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:6)
        at com.android.tools.r8.internal.vj.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:104)
        at com.android.tools.r8.internal.vj.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:100)
        at com.android.tools.r8.graph.x2.b(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:2)
        at com.android.tools.r8.dex.a.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:26)
        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]

emexes · Sep 30, 2023

Without seeing the associated source code, I am just guessing, but:

my first guess is that "CIRCULAR REFERENCE" might be a clue.

Marco Nissen · Oct 1, 2023

yes

emexes said:
Without seeing the associated source code, I am just guessing, but:

View attachment 146533

my first guess is that "CIRCULAR REFERENCE" might be a clue.

not really, the loop is not inside my code, but in the dexer
again, until target 30 I never had this issue
I updated b4a to version 12.50

emexes · Oct 1, 2023

emexes said:
my first guess is that "CIRCULAR REFERENCE" might be a clue.

Marco Nissen said:
not really, the loop is not inside my code, but in the dexer

You may well be correct. My initial gut feeling was that "CIRCULAR REFERENCE" was a hint from the programming gods above to look very hard at anything that looked remotely recursive or loopy. But it's a very hand-wavy feeling and hard to put into words, and probably would become even more vague during translation to Italian/Norwegian/German.

With luck, you're not the only one encountering the problem.

emexes · Oct 1, 2023

This is more spiritual than practical help, but:

Marco Nissen · Oct 1, 2023

if I removed "add photo" alltogether, the same error appears somewhere else ..

B4X:

Dex code    Error
Error in C:\Development\stash2go.android - Kopie\Objects\bin\classes\com\wurzelkraut\Stash2Go\calendaractivity$B4AMenuItemsClickListener.class:
java.lang.NullPointerException: Cannot invoke "String.length()" because "<parameter1>" is null
Compilation failed with an internal error.
Exception in thread "main" java.lang.RuntimeException: com.android.tools.r8.CompilationFailedException: Compilation failed to complete, origin: C:\Development\stash2go.android - Kopie\Objects\bin\classes\com\wurzelkraut\Stash2Go\calendaractivity$B4AMenuItemsClickListener.class
    at com.android.tools.r8.internal.vj.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:98)
    at com.android.tools.r8.D8.main(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:4)
Caused by: com.android.tools.r8.CompilationFailedException: Compilation failed to complete, origin: C:\Development\stash2go.android - Kopie\Objects\bin\classes\com\wurzelkraut\Stash2Go\calendaractivity$B4AMenuItemsClickListener.class
    at Version.fakeStackEntry(Version_3.3.20-dev+aosp1.java:0)
    at com.android.tools.r8.internal.vj.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:75)
    at com.android.tools.r8.internal.vj.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:28)
    at com.android.tools.r8.internal.vj.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:27)
    at com.android.tools.r8.internal.vj.b(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:2)
    at com.android.tools.r8.D8.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:22)
    at com.android.tools.r8.D8.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:17)
    at com.android.tools.r8.internal.vj.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:85)
    ... 1 more
Caused by: java.lang.NullPointerException: Cannot invoke "String.length()" because "<parameter1>" is null
    at com.android.tools.r8.graph.d1.<init>(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:5)
    at com.android.tools.r8.graph.v0.b(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:12)
    at com.android.tools.r8.graph.w2.b(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:9)
    at com.android.tools.r8.internal.La.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:873)
    at com.android.tools.r8.graph.x2.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:30)
    at com.android.tools.r8.internal.vj.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:101)
    at com.android.tools.r8.internal.vj.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:102)
    at com.android.tools.r8.internal.vj.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:100)
    at com.android.tools.r8.graph.x2.b(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:2)
    at com.android.tools.r8.dex.a.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:26)
    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.internal.xj: java.lang.NullPointerException: Cannot invoke "String.length()" because "<parameter1>" is null
        at com.android.tools.r8.dex.b.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:107)
        at com.android.tools.r8.dex.b.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:28)
        at com.android.tools.r8.D8.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:25)
        at com.android.tools.r8.D8.d(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:609)
        at com.android.tools.r8.D8.c(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:1)
        at com.android.tools.r8.internal.vj.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:24)
        at com.android.tools.r8.internal.vj.b(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:2)
        at com.android.tools.r8.D8.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:22)
        at com.android.tools.r8.D8.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:17)
        at com.android.tools.r8.internal.vj.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:85)
        at com.android.tools.r8.D8.main(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:4)
    Caused by: java.util.concurrent.ExecutionException: com.android.tools.r8.internal.xj: 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.C.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:56)
        at com.android.tools.r8.dex.b.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:88)
        ... 10 more
    Caused by: com.android.tools.r8.internal.xj: java.lang.NullPointerException: Cannot invoke "String.length()" because "<parameter1>" is null
        at com.android.tools.r8.internal.xj.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:6)
        at com.android.tools.r8.internal.vj.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:104)
        at com.android.tools.r8.internal.vj.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:100)
        at com.android.tools.r8.graph.x2.b(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:2)
        at com.android.tools.r8.dex.a.a(R8_3.3.20-dev+aosp1_dd4c01853fd917497aef2d09abff533f0d25b062517ea74449d40e1778a34753:26)
        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]

agraham · Oct 1, 2023

Marco Nissen said:
I updated b4a to version 12.50

Have you updated your SDK as well?

Marco Nissen · Oct 1, 2023

I updated B4A and the SDK according to here B4A – The simple way to develop native Android apps (b4x.com) , i.e. I downloaded the two zip files for that
and switched the target from previously 30 to now 33

emexes · Oct 1, 2023

Has there been any indication as to whether the problem was caused by updating B4A and JDK, or by updating the target from 30 to 33?

What happens if you target 32 or 31? (if that's even possible)

Andrew (Digitwell) · Oct 1, 2023

Not to labour the obvious, did you update the link to the JAR file?

Marco Nissen · Oct 1, 2023

yes I did - also in the manifest I updated to 33

Marco Nissen · Oct 1, 2023

emexes said:
Has there been any indication as to whether the problem was caused by updating B4A and JDK, or by updating the target from 30 to 33?

What happens if you target 32 or 31? (if that's even possible)

I don't have 31 or 32 available, for that I would have to download those

Luc719 · Oct 1, 2023

I have the same problem and don't find a way around ;(

See screenshot attached

Marco Nissen · Oct 1, 2023

I found and fixed the issue.
The cause was the JDK. I am using an ARM based JDK for Parallels ARM Windows on MacOS Silicon.
See here:

Java Download | Java 8, Java 11, Java 17, Java 21, Java 22 - OpenJDK Builds for Linux, Windows & macOS

Download Liberica JDK, supported OpenJDK builds. Open source Java 8, 11 and more for Linux, Windows, macOS.

bell-sw.com

I had an earlier version and thought it is safe to update to LTS 21
Now I reverted to LTS 17 full JDK and the issue is now gone.

Thanks for your input, Marco

Luc719 · Oct 1, 2023

I also solved my problem using Openjdk-14.01 instead of Java 8 and it worked

Erel · Oct 1, 2023

Marco Nissen said:
I had an earlier version and thought it is safe to update to LTS 21
Now I reverted to LTS 17 full JDK and the issue is now gone.

Don't waste your time. Carefully follow the installation instructions and it will work: https://www.b4x.com/b4a.html

Marco Nissen · Oct 1, 2023

Erel said:
Don't waste your time. Carefully follow the installation instructions and it will work: https://www.b4x.com/b4a.html

as I said I used Windows ARM not x86, and your proposed JDKs are way too slow on Apple Silicon/Parallels/Windows ARM

sgjesse · Oct 2, 2023

Looks like the underlying issue here is that later JDKs can generate classes where the `MethodParameters` attributes contain empty names. This is allowed by the spec:
```
If the value of the name_index item is zero, then this parameters element indicates a formal parameter with no name.
```

Chapter 4. The class File Format

However, this requires the R8 fix in https://r8-review.googlesource.com/c/r8/+/79240, which has been backported to versions 8.1.44 and 8.0.44. This has not been backported to R8 3.3.x, which is the version referenced in the first stack trace mentioned in this question, so upgrading to the latest 8.0.x version(or later) should fix the issue.

This analysis is based on retracing the stack trace from the question, which points to exactlyø the `visitParameter` method:
```
Caused by: java.lang.NullPointerException: Cannot invoke "String.length()" because "<parameter1>" is null
at com.android.tools.r8.graph.DexString.<init>(DexString.java:34)
at com.android.tools.r8.graph.DexItemFactory.createString(DexItemFactory.java:2188)
at com.android.tools.r8.graph.JarClassFileReader$CreateMethodVisitor.visitParameter(JarClassFileReader.java:872)
at com.android.tools.r8.org.objectweb.asm.ClassReader.readMethod(ClassReader.java:1387)
at com.android.tools.r8.org.objectweb.asm.ClassReader.accept(ClassReader.java:744)
at com.android.tools.r8.graph.JarClassFileReader.internalRead(JarClassFileReader.java:125)
at com.android.tools.r8.graph.JarClassFileReader.lambda$read$0(JarClassFileReader.java:96)
at com.android.tools.r8.utils.ExceptionUtils.lambda$withOriginAndPositionAttachmentHandler$5(ExceptionUtils.java:238)
at com.android.tools.r8.utils.ExceptionUtils.withOriginAndPositionAttachmentHandler(ExceptionUtils.java:246)
at com.android.tools.r8.utils.ExceptionUtils.withOriginAndPositionAttachmentHandler(ExceptionUtils.java:234)
at com.android.tools.r8.utils.ExceptionUtils.withOriginAttachmentHandler(ExceptionUtils.java:225)
at com.android.tools.r8.graph.JarClassFileReader.read(JarClassFileReader.java:96)
at com.android.tools.r8.graph.JarClassFileReader.read(JarClassFileReader.java:92)
at com.android.tools.r8.dex.ApplicationReader$ClassReader.lambda$readClassSources$2(ApplicationReader.java:422)
at java.base/java.util.concurrent.ForkJoinTask$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)
```

Android Question Target 30> 33

Marco Nissen

Active Member

emexes

Expert

Marco Nissen

Active Member

emexes

Expert

emexes

Expert

Marco Nissen

Active Member

agraham

Expert

Marco Nissen

Active Member

emexes

Expert

Andrew (Digitwell)

Well-Known Member

Marco Nissen

Active Member

Marco Nissen

Active Member

Luc719

New Member

Attachments

Marco Nissen

Active Member

Java Download | Java 8, Java 11, Java 17, Java 21, Java 22 - OpenJDK Builds for Linux, Windows & macOS

Luc719

New Member

Erel

B4X founder

Marco Nissen

Active Member

sgjesse

New Member

Similar Threads