Crash with most recent WebView

[softkot]

I found very unusual combination of crypted Realm and most recent WebView component from google.
The crash happening almost instantly even try to open simple about:blank url insife WebUrl and having Realm crypted database opened. If try to use non crypted backend or old WebVew components the crash does not happens.

Log cat shows folluwing details:

E/chromium( 6573): ### WebView Version 40 (1832189-arm) (code 424501)
F/libc ( 6573): Fatal signal 11 (SIGSEGV), code -6, fault addr 0x19ad in tid 6624 (Thread-16916)
I/DEBUG ( 186): *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
I/DEBUG ( 186): Build fingerprint: 'google/hammerhead/hammerhead:5.1/LMY47D/1743759:user/release-keys'
I/DEBUG ( 186): Revision: '11'
I/DEBUG ( 186): ABI: 'arm'
I/DEBUG ( 186): pid: 6573, tid: 6624, name: Thread-16916
I/DEBUG ( 186): signal 11 (SIGSEGV), code -6 (SI_TKILL), fault addr 0xa152e000
I/DEBUG ( 186): r0 aef1e1c0 r1 aef1e1d9 r2 a152e000 r3 00000000
I/DEBUG ( 186): r4 00000019 r5 00000000 r6 aec6511c r7 00000000
I/DEBUG ( 186): r8 aec650c0 r9 9fdbb040 sl aec65110 fp a2104904
I/DEBUG ( 186): ip b6de47dc sp a21048f8 lr a2f5dee9 pc a2f31fcc cpsr 800f0030
I/DEBUG ( 186):
I/DEBUG ( 186): backtrace:
I/DEBUG ( 186): #00 pc 0005dfcc lib/arm/libtightdb-jni.so
I/DEBUG ( 186): #1 pc 0005e043 lib/arm/libtightdb-jni.so
I/DEBUG ( 186): #2 pc 0005fb03 lib/arm/libtightdb-jni.so
I/DEBUG ( 186): #3 pc 00068e93 lib/arm/libtightdb-jni.so (Java_io_realm_internal_SharedGroup_nativeCommitAndContinueAsRead+42)
I/DEBUG ( 186): #4 pc 0014bb8f @base.apk@classes.dex
I/DEBUG ( 186):
I/DEBUG ( 186): Tombstone written to: /data/tombstones/tombstone_05

Thus i am running non rooted device it seems i can't get tombstone_05 file if it has some useful data.

[cmelchior]

Hi @softkot
It sounds like the exact same error that is happening here #1008 . Here it just gets triggered by accessing the CookieManager from Chromium manually when running multiple background threads.

If you are able to reproduce this without using multiple threads we would be very very interested in a reproducible test case.

[softkot]

Ok here you are https://github.com/softkot/realm-issue1023

[cmelchior]

Thank you very much for the project. I altered you code a bit to make it simpler (removed the handler) and it still crashes with the same error. I have moved the code into #1008 as it very much look like the same error. You can follow the progress there instead and I will close this as an duplicate.