Crashed.

[MrSorcus]

Crashed everytime on this site http://mmgp.ru/

js: Uncaught (in promise) PushPermissionNotGrantedError: The push permission was not granted.
Received signal 11 SEGV_MAPERR 000000000000
#0 0x7f059f5f530e <unknown>
#1 0x7f059f5f56e9 <unknown>
#2 0x7f059c99ca90 <unknown>
#3 0x7f059e5edd46 <unknown>
#4 0x7f05a0229f7e <unknown>
#5 0x7f05a0211023 <unknown>
#6 0x7f05a01cfaf4 <unknown>
#7 0x7f05a01cfc3f <unknown>
#8 0x7f05a0871b6a <unknown>
#9 0x7f05a0ed60f4 <unknown>
#10 0x7f05a0ed6219 <unknown>
#11 0x7f05a0ed89d2 <unknown>
#12 0x7f05a0e90ecc <unknown>
#13 0x7f05a07c2aed <unknown>
#14 0x7f05a0881520 <unknown>
#15 0x7f05a088170e <unknown>
#16 0x7f05a088188e <unknown>
#17 0x7f05a0881903 <unknown>
#18 0x7f05a088199d <unknown>
#19 0x7f05a07648cf <unknown>
#20 0x7f05a0b7b9df <unknown>
#21 0x7f05a0b7ba1e <unknown>
#22 0x7f059df4af2c <unknown>
#23 0x7f059df4d3de <unknown>
#24 0x7f059df4ea8b <unknown>
#25 0x7f059fe67eb0 <unknown>
#26 0x7f059f66c2bd <unknown>
#27 0x7f059fe6f054 <unknown>
#28 0x7f059fe6f687 <unknown>
#29 0x7f059f66c2bd <unknown>
#30 0x7f059f612aed <unknown>
#31 0x7f059f6136fd <unknown>
#32 0x7f059f6139e8 <unknown>
#33 0x7f059f6154a9 <unknown>
#34 0x7f059f62b6c4 <unknown>
#35 0x7f059f6118c5 <unknown>
#36 0x7f059f44e500 <unknown>
#37 0x7f059e18a32e <unknown>
#38 0x7f059e18a838 <unknown>
#39 0x7f059e188ab9 <unknown>
#40 0x7f059da89264 QtWebEngine::processMain()
#41 0x0000004008e3 <unknown>
#42 0x7f059c989511 __libc_start_main
#43 0x00000040093a <unknown>
  r8: 0000270ecf004399  r9: 00000b684e1a30c9 r10: 0000000000000002 r11: 0000000000000000
 r12: 00007ffd7deb8ba0 r13: 0000000000000000 r14: 0000000000000004 r15: 000000000236c480
  di: 000000000231a9e0  si: 00003da030d14541  bp: 000000000236c468  bx: 000000000231d520
  dx: 00000000023909f0  ax: 00007f05a2dce2cc  cx: 0000000000000002  sp: 00007ffd7deb8b60
  ip: 00007f059e5edd46 efl: 0000000000010246 cgf: 002b000000000033 erf: 0000000000000004
 trp: 000000000000000e msk: 0000000000000000 cr2: 0000000000000000
[end of stack trace]

Application version 2.1.99 (1d1c40ee7d)
QtWebEngine version 5.8.0

[iondissonance]

Can't reproduce. build d6b142b, QtWebEngine 5.9, openSUSE Tumbleweed x64

[Vistaus]

Can't reproduce either with QtWebEngine 5.9.1 on Solus Budgie (x64).

[Martii]

Unable to reproduce in Qt 5.9.1 at 3c60b8417a7e2ab2c831a907aaf54dcd94ab459f

That site does seem to have a little oddness to it though.

SeaMonkey (SM) redirects from https://mmgp.ru/ to http://mmgp.ru/ (this is unusual behavior for a site) whereas QupZilla shows an untrusted warning and prompt to add exception.

Only other items in console are related to the above:

js: Uncaught SecurityError: Blocked a frame with origin "http://ulogin.ru" from accessing a frame with origin "http://mmgp.ru". Protocols, domains, and ports must match.
js: Uncaught SecurityError: Blocked a frame with origin "https://ulogin.ru" from accessing a frame with origin "http://mmgp.ru".  The frame requesting access has a protocol of "https", the frame being accessed has a protocol of "http". Protocols must match.

js: Uncaught SecurityError: Blocked a frame with origin "https://ulogin.ru" from accessing a frame with origin "http://mmgp.ru".  The frame requesting access has a protocol of "https", the frame being accessed has a protocol of "http". Protocols must match.

Clicked around a bit in non-secure and it seems to be rendering with no crash.