Bug 54298 - Unhandled Exception: "Constructing instances of generic types from Java is not supported" running RuntimeTests suite
Summary: Unhandled Exception: "Constructing instances of generic types from Java is no...
Alias: None
Product: Android
Classification: Xamarin
Component: General ()
Version: 7.2 (15.1)
Hardware: PC Mac OS
: --- normal
Target Milestone: ---
Assignee: Jonathan Pryor
Depends on:
Reported: 2017-03-30 14:27 UTC by Gonzalo Martin
Modified: 2017-10-13 17:53 UTC (History)
3 users (show)

Is this bug a regression?: ---
Last known good build:

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Description Gonzalo Martin 2017-03-30 14:27:31 UTC
Category: "EnableSGenConcurrentTests"
Location: XQA.Android/XA7

- Download and run (device/emulator) the Runtime test suite for monodroid/d15.1

Expected Result: 
- tests passed

Actual Result: 
- tests failed with exception

03-30 10:55:04.123 I/MonoDroid( 5262): System.NotSupportedException: Constructing instances of generic types from Java is not supported, as the type parameters cannot be determined. ---> Java.Interop.JavaLocationException: Exception of type 'Java.Interop.JavaLocationException' was thrown.
03-30 10:55:04.123 I/MonoDroid( 5262):    --- End of inner exception stack trace ---
03-30 10:55:04.123 I/MonoDroid( 5262):   at Java.Interop.TypeManager.n_Activate (System.IntPtr jnienv, System.IntPtr jclass, System.IntPtr typename_ptr, System.IntPtr signature_ptr, System.IntPtr jobject, System.IntPtr parameters_ptr) [0x00180] in /Users/builder/data/lanes/4468/3cb10f5e/source/xamarin-android/src/Mono.Android/Java.Interop/TypeManager.cs:176 
03-30 10:55:04.123 I/MonoDroid( 5262):   at (wrapper dynamic-method) System.Object:bf8550f3-537f-4405-bce9-ceb395e3074f (intptr,intptr,intptr,intptr,intptr,intptr)
03-30 10:55:04.130 W/art     ( 5262): JNI RegisterNativeMethods: attempt to register 0 native methods for android.runtime.JavaProxyThrowable
03-30 10:55:04.133 D/Mono    ( 5262): DllImport searching in: '__Internal' ('(null)').
03-30 10:55:04.133 D/Mono    ( 5262): Searching for 'java_interop_jnienv_throw'.
03-30 10:55:04.133 D/Mono    ( 5262): Probing 'java_interop_jnienv_throw'.
03-30 10:55:04.133 D/Mono    ( 5262): Found as 'java_interop_jnienv_throw'.

Environment Info: https://gist.github.com/gonzalonm/509ac3cb52e4d86af55a6b2bf2c5ea5f
Comment 2 Cody Beyer (MSFT) 2017-07-13 21:08:57 UTC
Unfortunately, we’re unable to reproduce this report. If this issue is still occurring for you, please reopen this issue and attach a reproduction to the bug by starting with a clean Xamarin.Android project adding just the code necessary to demonstrate the issue.
Comment 3 Jon Douglas [MSFT] 2017-10-13 17:53:33 UTC
RESOLVING this bug as per https://bugzilla.xamarin.com/show_bug.cgi?id=54298#c2