Core crash with differnt backtrace

[beeender]

realm-java user helped to build an apk to reproduce this issue, see
realm/realm-java#2567 (comment)

APK and reproduce steps can be found in the internal link: https://secure.helpscout.net/conversation/299975517/8277/?folderId=366144

Here is the crash with the latest core release (v2.3.0) on Sumsung GT-S7572 Android 4.1.2

********** Crash dump: **********
Build fingerprint: 'samsung/kylepluszc/kylepluschn:4.1.2/JZO54K/S7572ZCAMJ2:user/release-keys'
pid: 10358, tid: 10377, name: Thread-771  >>> log.badtransaction.com.test.staging <<<
signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 50460000
Stack frame #00  pc 0000e220  /system/lib/libc.so
Stack frame #01  pc 000a9507  /data/data/log.badtransaction.com.test.staging/lib/librealm-jni.so: Routine realm::GroupWriter::write_array(char const*, unsigned int, unsigned int) at unwind-c.c:?

And crash log with core (v2.1.3) (the log is not incomplete, i forgot to save it ... but it doesn't matter, it could crash with all different kind of backtraces, and it is always reproducible.)

E/REALM_JNI: jni: ThrowingException 5, Failure when converting short string to UTF-16 error_code = 1; retcode = 0; StringData.size = 10; StringData.data = class_News; StringData as hex =  0x63 0x6c 0x61 0x73 0x73 0x5f 0x4e 0x65 0x77 0x73; in_begin = ass_News; in_end = ; out_curr = 0x52820be4; out_end = 0x52820c40; in /Users/cm/Realm/realm-java/realm/realm-library/src/main/cpp/io_realm_internal_Table.cpp line 1379, .

[beeender]

And this cannot be reproduced by emulator (at least i cannot, run it with emulator for 1+ hours), but it is very easy to be reproduced on a real device.

[ironage]

This should be fixed in #2465