Crash in setSize on GTK Debug

ASSERTION FAILED: !HashTranslator::equal(KeyTraits::emptyValue(), key)                                                                                                                      [42/1995]
DerivedSources/ForwardingHeaders/wtf/HashTable.h(625) : void WTF::HashTable<unsigned long, WTF::KeyValuePair<unsigned long, WTF::Function<void ()> >, WTF::KeyValuePairKeyExtractor<WTF::KeyValuePair
<unsigned long, WTF::Function<void ()> > >, WTF::IntHash<unsigned long>, WTF::HashMap<unsigned long, WTF::Function<void ()>, WTF::IntHash<unsigned long>, WTF::HashTraits<unsigned long>, WTF::HashTr
aits<WTF::Function<void ()> > >::KeyValuePairTraits, WTF::HashTraits<unsigned long> >::checkKey(const T &) [Key = unsigned long, Value = WTF::KeyValuePair<unsigned long, WTF::Function<void ()> >, E
xtractor = WTF::KeyValuePairKeyExtractor<WTF::KeyValuePair<unsigned long, WTF::Function<void ()> > >, HashFunctions = WTF::IntHash<unsigned long>, Traits = WTF::HashMap<unsigned long, WTF::Function
<void ()>, WTF::IntHash<unsigned long>, WTF::HashTraits<unsigned long>, WTF::HashTraits<WTF::Function<void ()> > >::KeyValuePairTraits, KeyTraits = WTF::HashTraits<unsigned long>, HashTranslator =
WTF::HashMapTranslator<WTF::HashMap<unsigned long, WTF::Function<void ()>, WTF::IntHash<unsigned long>, WTF::HashTraits<unsigned long>, WTF::HashTraits<WTF::Function<void ()> > >::KeyValuePairTrait
s, WTF::IntHash<unsigned long> >, T = unsigned long]
1   0x7f507e74cd89 /home/yurys/WebKit/WebKitBuild/Debug/lib/libjavascriptcoregtk-4.0.so.18(WTFCrash+0x9) [0x7f507e74cd89]
2   0x7f508a0d3a5b /home/yurys/WebKit/WebKitBuild/Debug/lib/libwebkit2gtk-4.0.so.37(+0x956ca5b) [0x7f508a0d3a5b]
3   0x7f508a64617d /home/yurys/WebKit/WebKitBuild/Debug/lib/libwebkit2gtk-4.0.so.37(_ZN3WTF9HashTableImNS_12KeyValuePairImNS_8FunctionIFvvEEEEENS_24KeyValuePairKeyExtractorIS5_EENS_7IntHashImEENS_7
HashMapImS4_S9_NS_10HashTraitsImEENSB_IS4_EEE18KeyValuePairTraitsESC_E8checkKeyINS_17HashMapTranslatorISF_S9_EEmEEvRKT0_+0x7d) [0x7f508a64617d]
4   0x7f508a645e6f /home/yurys/WebKit/WebKitBuild/Debug/lib/libwebkit2gtk-4.0.so.37(_ZN3WTF9HashTableImNS_12KeyValuePairImNS_8FunctionIFvvEEEEENS_24KeyValuePairKeyExtractorIS5_EENS_7IntHashImEENS_7
HashMapImS4_S9_NS_10HashTraitsImEENSB_IS4_EEE18KeyValuePairTraitsESC_E3addINS_17HashMapTranslatorISF_S9_EERKmS4_EENS_18HashTableAddResultINS_17HashTableIteratorImS5_S7_S9_SF_SC_EEEEOT0_OT1_+0x3f) [
0x7f508a645e6f]
5   0x7f508a645e14 /home/yurys/WebKit/WebKitBuild/Debug/lib/libwebkit2gtk-4.0.so.37(_ZN3WTF7HashMapImNS_8FunctionIFvvEEENS_7IntHashImEENS_10HashTraitsImEENS6_IS3_EEE9inlineAddIRKmS3_EENS_18HashTabl
eAddResultINS_17HashTableIteratorImNS_12KeyValuePairImS3_EENS_24KeyValuePairKeyExtractorISG_EES5_NS9_18KeyValuePairTraitsES7_EEEEOT_OT0_+0x54) [0x7f508a645e14]
6   0x7f508ae1bc98 /home/yurys/WebKit/WebKitBuild/Debug/lib/libwebkit2gtk-4.0.so.37(_ZN3WTF7HashMapImNS_8FunctionIFvvEEENS_7IntHashImEENS_10HashTraitsImEENS6_IS3_EEE9inlineSetIRKmS3_EENS_18HashTabl
eAddResultINS_17HashTableIteratorImNS_12KeyValuePairImS3_EENS_24KeyValuePairKeyExtractorISG_EES5_NS9_18KeyValuePairTraitsES7_EEEEOT_OT0_+0x58) [0x7f508ae1bc98]
7   0x7f508ae1374f /home/yurys/WebKit/WebKitBuild/Debug/lib/libwebkit2gtk-4.0.so.37(_ZN3WTF7HashMapImNS_8FunctionIFvvEEENS_7IntHashImEENS_10HashTraitsImEENS6_IS3_EEE3setIS3_EENS_18HashTableAddResul
tINS_17HashTableIteratorImNS_12KeyValuePairImS3_EENS_24KeyValuePairKeyExtractorISE_EES5_NS9_18KeyValuePairTraitsES7_EEEERKmOT_+0x4f) [0x7f508ae1374f]
8   0x7f508ae04177 /home/yurys/WebKit/WebKitBuild/Debug/lib/libwebkit2gtk-4.0.so.37(_ZN6WebKit35DrawingAreaProxyCoordinatedGraphics25waitForBackingStoreUpdateEON3WTF8FunctionIFvvEEE+0x47) [0x7f508a
e04177]
9   0x7f508aee67b2 /home/yurys/WebKit/WebKitBuild/Debug/lib/libwebkit2gtk-4.0.so.37(_ZN6WebKit30WebPageInspectorEmulationAgent15platformSetSizeEiiON3WTF8FunctionIFvRKNS1_6StringEEEE+0x212) [0x7f508
aee67b2]
10  0x7f508aabf601 /home/yurys/WebKit/WebKitBuild/Debug/lib/libwebkit2gtk-4.0.so.37(_ZN6WebKit30WebPageInspectorEmulationAgent24setDeviceMetricsOverrideEiidON3WTF3RefIN9Inspector33EmulationBackendD
ispatcherHandler32SetDeviceMetricsOverrideCallbackENS1_13DumbPtrTraitsIS5_EEEE+0x81) [0x7f508aabf601]
11  0x7f507dcb403a /home/yurys/WebKit/WebKitBuild/Debug/lib/libjavascriptcoregtk-4.0.so.18(_ZN9Inspector26EmulationBackendDispatcher24setDeviceMetricsOverrideElON3WTF6RefPtrINS1_8JSONImpl6ObjectENS
1_13DumbPtrTraitsIS4_EEEE+0x30a) [0x7f507dcb403a]
12  0x7f507dcb3c42 /home/yurys/WebKit/WebKitBuild/Debug/lib/libjavascriptcoregtk-4.0.so.18(_ZN9Inspector26EmulationBackendDispatcher8dispatchElRKN3WTF6StringEONS1_3RefINS1_8JSONImpl6ObjectENS1_13Du
mbPtrTraitsIS7_EEEE+0xd2) [0x7f507dcb3c42]
13  0x7f507dc98c46 /home/yurys/WebKit/WebKitBuild/Debug/lib/libjavascriptcoregtk-4.0.so.18(_ZN9Inspector17BackendDispatcher8dispatchERKN3WTF6StringENS0_4ModeE+0x7b6) [0x7f507dc98c46]
14  0x7f508aac0e75 /home/yurys/WebKit/WebKitBuild/Debug/lib/libwebkit2gtk-4.0.so.37(_ZN6WebKit27WebPageInspectorTargetProxy26sendMessageToTargetBackendERKN3WTF6StringE+0x35) [0x7f508aac0e75]
15  0x7f508aa101a3 /home/yurys/WebKit/WebKitBuild/Debug/lib/libwebkit2gtk-4.0.so.37(_ZN6WebKit27BrowserInspectorTargetAgent19sendMessageToTargetERN3WTF6StringERKS2_S5_+0x73) [0x7f508aa101a3]
16  0x7f507dcc83d1 /home/yurys/WebKit/WebKitBuild/Debug/lib/libjavascriptcoregtk-4.0.so.18(_ZN9Inspector23TargetBackendDispatcher19sendMessageToTargetElON3WTF6RefPtrINS1_8JSONImpl6ObjectENS1_13Dumb
PtrTraitsIS4_EEEE+0x1c1) [0x7f507dcc83d1]
17  0x7f507dcc7ca4 /home/yurys/WebKit/WebKitBuild/Debug/lib/libjavascriptcoregtk-4.0.so.18(_ZN9Inspector23TargetBackendDispatcher8dispatchElRKN3WTF6StringEONS1_3RefINS1_8JSONImpl6ObjectENS1_13DumbP
trTraitsIS7_EEEE+0x164) [0x7f507dcc7ca4]
18  0x7f507dc98c46 /home/yurys/WebKit/WebKitBuild/Debug/lib/libjavascriptcoregtk-4.0.so.18(_ZN9Inspector17BackendDispatcher8dispatchERKN3WTF6StringENS0_4ModeE+0x7b6) [0x7f507dc98c46]