[Webkit-unassigned] [Bug 203549] New: REGRESSION (r251413): Nightly build crashes on launch due to -[WKPreferences _setShouldAllowDesignSystemUIFonts:]: unrecognized selector

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=203549

            Bug ID: 203549
           Summary: REGRESSION (r251413): Nightly build crashes on launch
                    due to -[WKPreferences
                    _setShouldAllowDesignSystemUIFonts:]: unrecognized
                    selector
           Product: WebKit
           Version: WebKit Local Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit2
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: mitz at webkit.org

r251413, the change made for bug 203129, removed a method used by the current version of Safari (version 13.0.2 (13608.2.40.1.3)), causing nightly builds to crash on launch:

2019-10-28 20:50:07.640 SafariForWebKitDevelopment[67089:31260958] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[WKPreferences _setShouldAllowDesignSystemUIFonts:]: unrecognized selector sent to instance 0x7fb3b7649220'
*** First throw call stack:
(
        0   CoreFoundation                      0x00007fff4dc76e0b __exceptionPreprocess + 171
        1   libobjc.A.dylib                     0x00007fff753b0c76 objc_exception_throw + 48
        2   CoreFoundation                      0x00007fff4dd0f964 -[NSObject(NSObject) doesNotRecognizeSelector:] + 132
        3   CoreFoundation                      0x00007fff4dbec6f0 ___forwarding___ + 1456
        4   CoreFoundation                      0x00007fff4dbec0b8 _CF_forwarding_prep_0 + 120
        5   Safari                              0x000000010c10ea15 -[WebKitPreferencesManager _initializeReaderPageGroupPreferencesManager] + 69
        6   Safari                              0x000000010c10c424 -[WebKitPreferencesManager _initWithPreferencesType:] + 291
        7   Safari                              0x000000010c10bb0a __61+[WebKitPreferencesManager readerPageGroupPreferencesManager]_block_invoke + 46
        8   libdispatch.dylib                   0x00007fff75f90db8 _dispatch_client_callout + 8
        9   libdispatch.dylib                   0x00007fff75f90d6b dispatch_once_f + 41
        10  Safari                              0x000000010c10bad9 +[WebKitPreferencesManager readerPageGroupPreferencesManager] + 45
        11  Safari                              0x000000010c26cae4 ___ZN6Safari16ReaderController15readerPageGroupEv_block_invoke + 48

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