1   0x7ff1d081bcb9 WTFCrash
2   0x55c72857be69 /app/webkit/WebKitBuild/Release/bin/WebKitTestRunner(+0xe7e69) [0x55c72857be69]
3   0x55c72859f1af /app/webkit/WebKitBuild/Release/bin/WebKitTestRunner(+0x10b1af) [0x55c72859f1af]
4   0x7ff1cf3d1674 /app/webkit/WebKitBuild/Release/lib/libWPEWebKit-2.0.so.1(+0x23ae674) [0x7ff1cf3d1674]
5   0x7ff17bcc8027 [0x7ff17bcc8027]