4.14.1 crash on arch linux (64bit)

kernel: datovka[48481]: segfault at 18 ip 00007fc22c8ae435 sp 00007ffe90252b30 error 4 in libQt5Network.so.5.14.0[7fc22c893000+120000]

`Dec 23 02:10:28 prdell systemd-coredump[48506]: Process 48481 (datovka) of user 1000 dumped core.

                                            Stack trace of thread 48481:                                                                                                                   
                                            #0  0x00007fc22c8ae435 _ZNK15QNetworkRequest9attributeENS_9AttributeERK8QVariant (libQt5Network.so.5 + 0x5b435)
                                            #1  0x00007fc22c89a0cc n/a (libQt5Network.so.5 + 0x470cc)                                                                                                                                      #2  0x00007fc22c89e812 n/a (libQt5Network.so.5 + 0x4b812)
                                            #3  0x00007fc22c5a6370 n/a (libQt5Core.so.5 + 0x2da370)                                                                                                                                        #4  0x00007fc22c907cb9 n/a (libQt5Network.so.5 + 0xb4cb9)
                                            #5  0x00007fc22c9aee61 n/a (libQt5Network.so.5 + 0x15be61)
                                            #6  0x00007fc22c59e13a _ZN7QObject5eventEP6QEvent (libQt5Core.so.5 + 0x2d213a)
                                            #7  0x00007fc22d213472 _ZN19QApplicationPrivate13notify_helperEP7QObjectP6QEvent (libQt5Widgets.so.5 + 0x15b472)
                                            #8  0x00007fc22d21cc89 _ZN12QApplication6notifyEP7QObjectP6QEvent (libQt5Widgets.so.5 + 0x164c89)
                                            #9  0x00007fc22c570832 _ZN16QCoreApplication15notifyInternal2EP7QObjectP6QEvent (libQt5Core.so.5 + 0x2a4832)
                                            #10 0x00007fc22c573096 _ZN23QCoreApplicationPrivate16sendPostedEventsEP7QObjectiP11QThreadData (libQt5Core.so.5 + 0x2a7096)
                                            #11 0x00007fc22c5c9674 n/a (libQt5Core.so.5 + 0x2fd674)
                                            #12 0x00007fc22949f39e g_main_context_dispatch (libglib-2.0.so.0 + 0x6a39e)
                                            #13 0x00007fc2294a11b1 n/a (libglib-2.0.so.0 + 0x6c1b1)
                                            #14 0x00007fc2294a11f1 g_main_context_iteration (libglib-2.0.so.0 + 0x6c1f1)
                                            #15 0x00007fc22c5c8cc0 _ZN20QEventDispatcherGlib13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE (libQt5Core.so.5 + 0x2fccc0)
                                            #16 0x00007fc22c56f39c _ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE (libQt5Core.so.5 + 0x2a339c)
                                            #17 0x00007fc22c5773a6 _ZN16QCoreApplication4execEv (libQt5Core.so.5 + 0x2ab3a6)
                                            #18 0x000055d130678ed6 n/a (datovka + 0x84ed6)
                                            #19 0x00007fc22bf28153 __libc_start_main (libc.so.6 + 0x27153)
                                            #20 0x000055d13067965e n/a (datovka + 0x8565e)

`

compiled with qt 5.14 and libisds 0.11

i don't want to overwhelm this report so feel free to ask for the info you need...