[Webkit-unassigned] [Bug 195457] New: [GTK] Several DNSTests are crashing

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=195457

            Bug ID: 195457
           Summary: [GTK] Several DNSTests are crashing
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKitGTK
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: dpino at igalia.com
                CC: bugs-noreply at webkitgtk.org

Several DNS tests are crashing (https://build.webkit.org/builders/GTK%20Linux%2064-bit%20Release%20%28Tests%29/builds/9929/steps/API%20tests/logs/stdio):

```
Unexpected crashes (3)
        /WebCore/TestWebCore
                DNSTest.cannotResolveDNS
                DNSTest.cancelResolveDNS
                DNSTest.resolveDNS
```

I looked into this issue and it seems the tests crash when attempting to access `soupNetworkSession()` (globalDefaultNetworkStorageSessionAccessor()().soupNetworkSession()). For instance:

https://github.com/WebKit/webkit/blob/master/Source/WebCore/platform/network/soup/DNSResolveQueueSoup.cpp#L95
https://github.com/WebKit/webkit/blob/master/Source/WebCore/platform/network/soup/DNSResolveQueueSoup.cpp#L187

I don't know when the tests stopped working. The earliest build tests results I could get were from r240433 and the tests were already crashing by then:

https://build.webkit.org/builders/GTK%20Linux%2064-bit%20Release%20%28Tests%29/builds/9480/steps/API%20tests/logs/stdio

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