The error still persists: It is not possible to open a skeletal mesh in the UE4Editor.
I got 4.16 running under Ubuntu 16.10 now (it does not work with ubuntu 14.04).
To reproduce this error a took a fresh ubuntu installation with latest NVidia drivers.
Open UE4Editor.
Create a map from the tuturials, e.g. vehicle game.
double click on sedan skeletal mesh.
[Callstack] 00 0x00007f768ba57cff FLinuxPlatformStackWalk::CaptureStackBackTrace(unsigned long long*, unsigned int, void*)
[Callstack] 01 0x00007f768b940ea5 FGenericPlatformStackWalk::StackWalkAndDump(char*, unsigned long, int, void*)
[Callstack] 02 0x00007f768ba5d712 FDebug::LogAssertFailedMessage(char const*, char const*, int, wchar_t const*, …)
[Callstack] 03 0x00007f7597191e00 TCommands::Get()
[Callstack] 04 0x00007f759718d21e FSkeletalMeshEditor::BindCommands()
[Callstack] 05 0x00007f759718cb24 FSkeletalMeshEditor::InitSkeletalMeshEditor(EToolkitMode::Type, TSharedPtr const&, USkeletalMesh*)
[Callstack] 06 0x00007f7597196632 FSkeletalMeshEditorModule::CreateSkeletalMeshEditor(EToolkitMode::Type, TSharedPtr const&, USkeletalMesh*)
[Callstack] 07 0x00007f7624bd427b FAssetTypeActions_SkeletalMesh::OpenAssetEditor(TArray const&, TSharedPtr)
[Callstack] 08 0x00007f7683778070 FAssetEditorManager::OpenEditorForAsset(UObject*, EToolkitMode::Type, TSharedPtr)
[Callstack] 09 0x00007f767527404c FAssetTypeActions_Base::AssetsActivated(TArray const&, EAssetTypeActivationMethod::Type)
[Callstack] 10 0x00007f760fc56cb2 SContentBrowser::OnAssetsActivated(TArray const&, EAssetTypeActivationMethod::Type)
[Callstack] 11 0x00007f760fd035f5 TBaseSPMethodDelegateInstance const&, EAssetTypeActivationMethod::Type)>::ExecuteIfSafe(TArray const&, EAssetTypeActivationMethod::Type) const
[Callstack] 12 0x00007f760fc20cc2 SAssetView::OnListMouseButtonDoubleClick(TSharedPtr)
[Callstack] 13 0x00007f760fcc3b7b TBaseSPMethodDelegateInstance (TSharedPtr)>::Execute(TSharedPtr) const
[Callstack] 14 0x00007f760fcc3c15 TBaseSPMethodDelegateInstance)>::ExecuteIfSafe(TSharedPtr) const
[Callstack] 15 0x00007f760fb857eb non-virtual thunk to SListView >::Private_OnItemDoubleClicked(TSharedPtr)
[Callstack] 16 0x00007f760fbee058 STableRow >::OnMouseButtonDoubleClick(FGeometry const&, FPointerEvent const&)
[Callstack] 17 0x00007f760fbf167d non-virtual thunk to STableRow >::OnMouseButtonDoubleClick(FGeometry const&, FPointerEvent const&)
[Callstack] 18 0x00007f7685241109 FSlateApplication::RoutePointerDoubleClickEvent(FWidgetPath&, FPointerEvent&)
[Callstack] 19 0x00007f7685240b9f FSlateApplication::ProcessMouseButtonDoubleClickEvent(TSharedPtr const&, FPointerEvent&)
[Callstack] 20 0x00007f768524055d FSlateApplication::OnMouseDoubleClick(TSharedPtr const&, EMouseButtons::Type, FVector2D)
[Callstack] 21 0x00007f768ba0d725 FLinuxApplication::ProcessDeferredMessage(SDL_Event)
[Callstack] 22 0x00007f768ba0ba5d FLinuxApplication::AddPendingEvent(SDL_Event)
[Callstack] 23 0x00007f768ba0b92c FLinuxPlatformMisc::PumpMessages(bool)
[Callstack] 24 0x000000000041f36d FEngineLoop::Tick() [Runtime/Core/Public/UObject/NameTypes.h, line 638]
[Callstack] 25 0x000000000042460a GuardedMain(wchar_t const*) [/media/dragontas/35e8a147-8027-4a92-9ff9-4a0d79173eef/Dokumente/4-16/UnrealEngine/Engine/Source/Runtime/Launch/Private/Launch.cpp, line 166]
[Callstack] 26 0x00007f7681c46f2b CommonLinuxMain(int, char**, int ()(wchar_t const))
[Callstack] 27 0x00007f7680ff03f1 /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf1) [0x7f7680ff03f1]
[Callstack] 28 0x0000000000414e4a /media/dragontas/35e8a147-8027-4a92-9ff9-4a0d79173eef/Dokumente/4-16/
[2016.12.26-20.35.53:375][884]LogLinux:Error: appError called: Assertion failed: Assertion failed: IsValid() [File:Runtime/Core/Public/Templates/SharedPointer.h] [Line: 826]
Signal 11 caught.
Malloc Size=131076 LargeMemoryPoolOffset=131092
CommonLinuxCrashHandler: Signal=11
Malloc Size=65535 LargeMemoryPoolOffset=196655
[2016.12.26-20.35.53:405][884]LogCrashTracker:
[2016.12.26-20.35.53:405][884]LogLinux: === Critical error: ===
Unhandled Exception: SIGSEGV: invalid attempt to write memory at address 0x0000000000000003
[2016.12.26-20.35.53:406][884]LogLinux: Assertion failed: Assertion failed: IsValid() [File:Runtime/Core/Public/Templates/SharedPointer.h] [Line: 826]