App suddenly not opening at all

Suddenly, the lichess app for Android is not functioning at all. I just see the logo/splash screen and then it immediately crashes to the desktop.

EDIT: Uninstall/reinstall accomplished absolutely nothing.

I can confirm this bug - I am unable to launch the android app.

Tested on Realme 7 pro running android 10

with an adb logcat I get:

03-23 08:22:59.123 F/libc (30382): Fatal signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x0 in tid 30382 (chess.mobileapp), pid 30382 (chess.mobileapp)
03-23 08:22:59.125 E/libc (30382): test_tag fcntl before
03-23 08:22:59.125 E/libc (30382): test_tag fcntl after
03-23 08:22:59.234 I/crash_dump64(30445): obtaining output fd from tombstoned, type: kDebuggerdTombstone
03-23 08:22:59.235 I//system/bin/tombstoned( 1533): received crash request for pid 30382
03-23 08:22:59.237 I/crash_dump64(30445): performing dump of process 30382 (target tid = 30382)
03-23 08:22:59.250 F/DEBUG (30445): Process name is org.lichess.mobileapp, not key_process
03-23 08:22:59.250 F/DEBUG (30445): *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
03-23 08:22:59.250 F/DEBUG (30445): Build fingerprint: 'realme/RMX2170EEA/RMX2170L1:10/QKQ1.200428.002/1607768998:user/release-keys'
03-23 08:22:59.250 F/DEBUG (30445): Revision: '0'
03-23 08:22:59.250 F/DEBUG (30445): ABI: 'arm64'
03-23 08:22:59.250 F/DEBUG (30445): Timestamp: 2021-03-23 08:22:59+0100
03-23 08:22:59.250 F/DEBUG (30445): pid: 30382, tid: 30382, name: chess.mobileapp >>> org.lichess.mobileapp <<<
03-23 08:22:59.250 F/DEBUG (30445): uid: 10205
03-23 08:22:59.250 F/DEBUG (30445): signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x0
03-23 08:22:59.250 F/DEBUG (30445): Cause: null pointer dereference
03-23 08:22:59.250 F/DEBUG (30445): x0 0000000000000000 x1 0000006f573cca47 x2 0000000000000000 x3 0000000000000000
03-23 08:22:59.250 F/DEBUG (30445): x4 0000000000000000 x5 8080808080808080 x6 fefefefefefefeff x7 7f7f7f7f7f7f7f7f
03-23 08:22:59.250 F/DEBUG (30445): x8 0101010101010101 x9 0000006f573d4000 x10 000000680002dc08 x11 0000006f573d6af0
03-23 08:22:59.250 F/DEBUG (30445): x12 00000000ffffffff x13 0000000000000000 x14 4b3d092f234ec266 x15 cae6c696f68e9634
03-23 08:22:59.250 F/DEBUG (30445): x16 0000006f5be05b00 x17 0000007036af9e20 x18 000000703b6fa000 x19 0000000000000003
03-23 08:22:59.251 F/DEBUG (30445): x20 0000000000000000 x21 000000680001fe40 x22 0000007fca9d7088 x23 000000680002dc08
03-23 08:22:59.251 F/DEBUG (30445): x24 000000680002dc18 x25 0000000000000000 x26 0000007fca9d7320 x27 0000000000000000
03-23 08:22:59.251 F/DEBUG (30445): x28 00000068000b80d0 x29 0000007fca9d6fe0
03-23 08:22:59.251 F/DEBUG (30445): sp 0000007fca9d6fb0 lr 0000006f5a757270 pc 0000006f5a757270
03-23 08:22:59.251 F/DEBUG (30445):
03-23 08:22:59.251 F/DEBUG (30445): backtrace:
03-23 08:22:59.251 F/DEBUG (30445): #00 pc 0000000003862270 /data/app/com.google.android.trichromelibrary_438908634-rF6KBKQebH13iaXyGHRBcQ==/base.apk!libmonochrome_64.so (offset 0x646000) (BuildId: e2f2718d38d6c7ad33a5476f7776cc457f9c03d2)
03-23 08:22:59.550 D/ColorEapUtils( 1945): setCrashProcessRecord: org.lichess.mobileapp
03-23 08:22:59.555 E//system/bin/tombstoned( 1533): Tombstone written to: /data/tombstones/tombstone_03
03-23 08:22:59.557 I/DropBoxManagerService( 1945): add tag=data_app_native_crash isTagEnabled=true flags=0x2
03-23 08:22:59.560 W/ActivityTaskManager( 1945): Force finishing activity org.lichess.mobileapp/.MainActivity

let me know if I can help with any further testing...

q:o) Theis

And I found a work around: simply go to settings -> apps -> lichess -> storage -> clear data and cache

q:o) Theis

OK - Just a quick follow up: I have now tested on 4 android phone running android 5,10,10 and 11. And the bug only appeared on my daily phone. No longer able to reproduce the bug

q:o) Theis

I had the same problem, not only with lichess, but with other apps, updating Android System WebView (like recommended here https://9to5google.com/2021/03/22/android-apps-crashing-webview/) fixed it

#1 etc. This is the point where I would be asking technical questions if I had any idea what to ask.

Updating Android System Webview fixed it for me. Thanks @grel3gargamel

Yeah - it is a bug in the webview. Also problems starting gmail app, but of course we noticed lichess problems first :-)

https://www.express.co.uk/life-style/science-technology/1413423/Gmail-down-Android-app-crash-Google

q:o) Theis

Thanks to grel3gargamel

I updated Webview and the problem fixed

Updating Webview didn't help me, deinstalling did the trick.