[mono-android] HTC crash in debug

[Jonathan Pryor]

On Oct 29, 2012, at 8:30 AM, MarkDaniel <markdaniel at avolites.com> wrote:
> I wondered if anyone had any hints where to look? 

> System.NullReferenceException: Object reference not set to an instance of an object

This frequently means that the process has died, and the NRE is the last gasp of the runtime. You'd have to look at the surrounding logcat output for additional contextual information, e.g. Dalvik may be nuking you because you used too much memory.

Or mono asserted and killed your process for you, like here:

> 10-29 12:29:09.459 W/        ( 6363): _wapi_handle_ref: Attempting to ref unused handle 0x443
> 10-29 12:29:09.459 F/        ( 6363): * Assertion at /Users/builder/data/lanes/monodroid-mac-monodroid-4.2.6-branch/632e6ddf/source/mono/mono/io-layer/wthreads.c:1365, condition `ok' not met

This can happen if the executing thread can't be found:

	https://github.com/mono/mono/blob/mono-2-10/mono/io-layer/wthreads.c#L1365

So either OpenThread() failed (returning an invalid thread_handle), or _wapi_lookup_handle() failed for some other reason; I don't know what, but this looks like a Shouldn't Happen™ scenario. I'd likewise wonder if there is any other relevant logcat messages from pid 6363 (in this case!) that would point to Dalvik nuking your process.

 - Jon