Didn't find class "java.nio.file.Path" below Android api 26

[KevynBct]

Hello,

With the version 2.10.0.pr3, I've got an error on simulators (and certainly real devices) with an API below 26 :

09-19 17:16:36.077 26359-26359/XX.XXXXX.XXXXX E/AndroidRuntime: FATAL EXCEPTION: main Process: XX.XXXXX.XXXXX, PID: 26359 java.lang.NoClassDefFoundError: Failed resolution of: Ljava/nio/file/Path; at com.fasterxml.jackson.databind.ext.Java7HandlersImpl.getDeserializerForJavaNioFilePath(Java7HandlersImpl.java:20)

Caused by: java.lang.ClassNotFoundException: Didn't find class "java.nio.file.Path" on path: DexPathList[[zip file "/data/app/XX.XXXXX.XXXXX-1/base.apk", zip file "/data/app/XX.XXXXX.XXXXX-1/split_config.fr.apk", zip file "/data/app/XX.XXXXX.XXXXX-1/split_config.xxxhdpi.apk"],nativeLibraryDirectories=[/data/app/XX.XXXXX.XXXXX-1/lib/x86, /vendor/lib, /system/lib]] at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56) at java.lang.ClassLoader.loadClass(ClassLoader.java:511) at java.lang.ClassLoader.loadClass(ClassLoader.java:469)

[cowtowncoder]

I think this is not Kotlin-specifc, so moving to jackson-databind.
Most likely caused by imperfect handling of #2446

Thank you for reporting the problem! This sounds like regresssion? Code in question was refactored and it is possible that handling of not finding JDK 7 class got broken: intent is for missing class to be handled gracefully, to allow running on platforms like Android that have JavaSE 6 (or close) level compatibility.

Do you know (or can test) if 2.10.0.pr2 suffers from same issue? I am guessing it wouldn't (there would be a log statement indicating missing type or something, but no exception)

[cowtowncoder]

Hmmh. Ok, I suspect this is because of my assuming that simply loading a class that depends on another class would trigger failure (on lines 23-24 of Java7Handlers), and that failure would be caught.

But based on symptoms, I guess loading works ok (alas!) and the problem comes from trying to call a method that actually refers to the class that is missing.

In hindsight this makes sense -- I think I will need to shuffle things around, and cause early failure, instead of deferred one.
The main challenge here is simply that I have no good way to test it.