Steps to reproduce:
1. Open User-supplied project
2. Play the Scene "SampleScene"
3. Press 'D"

Expected: no crash
Actual: crash

Reproduced in: 2018.3.0a1, 2018.3.1f1, 2019.1.0a12
Not reproduced in: 2017.4.17f1*

Notes:
The crash seems to be related to the line '80' on "PhysicsObject.cs" script, where User is trying to ground the Player
*Could not test due to definition errors

Full stack trace:
0x0000000141D3519B (Unity) PhysicsQuery2D::ColliderCastAll
0x0000000141D87F15 (Unity) Rigidbody2D::CastFiltered_Binding
0x000000014188E264 (Unity) Rigidbody2D_CUSTOM_CastFiltered_Internal_Injected
0x0000000056E0DF8B (Mono JIT Code) (wrapper managed-to-native) UnityEngine.Rigidbody2D:CastFiltered_Internal_Injected (UnityEngine.Vector2&,single,UnityEngine.ContactFilter2D&,UnityEngine.RaycastHit2D[])
0x0000000056E0DDD8 (Mono JIT Code) UnityEngine.Rigidbody2D:CastFiltered_Internal (UnityEngine.Vector2,single,UnityEngine.ContactFilter2D,UnityEngine.RaycastHit2D[])
0x0000000056E0DCF4 (Mono JIT Code) [C:\buildslave\unity\build\Modules\Physics2D\ScriptBindings\Physics2D.bindings.cs:2641] UnityEngine.Rigidbody2D:Cast (UnityEngine.Vector2,UnityEngine.ContactFilter2D,UnityEngine.RaycastHit2D[],single)
0x0000000056E0C5B6 (Mono JIT Code) [E:\Downloads\case_1099642-Mario_1-1\Assets\Scripts\PhysicsObject.cs:80] PhysicsObject:Movement (UnityEngine.Vector2,bool)
0x0000000056E0BE65 (Mono JIT Code) [E:\Downloads\case_1099642-Mario_1-1\Assets\Scripts\PhysicsObject.cs:66] PhysicsObject:FixedUpdate ()
0x0000000050677192 (Mono JIT Code) (wrapper runtime-invoke) object:runtime_invoke_void__this__ (object,intptr,intptr,intptr)
0x00007FFEF94C671B (mono) [c:\buildslave\mono\build\mono\mini\mini.c:4937] mono_jit_runtime_invoke
0x00007FFEF9418A71 (mono) [c:\buildslave\mono\build\mono\metadata\object.c:2623] mono_runtime_invoke
0x0000000140C0911A (Unity) scripting_method_invoke
0x0000000140C01470 (Unity) ScriptingInvocation::Invoke
0x0000000140BB77B8 (Unity) MonoBehaviour::CallMethodIfAvailable
0x0000000140BB7E94 (Unity) MonoBehaviour::CallUpdateMethod
0x00000001406EDBA9 (Unity) BaseBehaviourManager::CommonUpdate<FixedBehaviourManager>
0x00000001406F3B16 (Unity) FixedBehaviourManager::Update
0x000000014096C4CC (Unity) `InitPlayerLoopCallbacks'::`2'::FixedUpdateScriptRunBehaviourFixedUpdateRegistrator::Forward
0x000000014096BAE7 (Unity) ExecutePlayerLoop
0x000000014096BB96 (Unity) ExecutePlayerLoop
0x000000014096E37C (Unity) PlayerLoop
0x000000014145128A (Unity) PlayerLoopController::UpdateScene
0x000000014144F4A3 (Unity) Application::TickTimer
0x00000001415EEC95 (Unity) MainMessageLoop
0x00000001415F1088 (Unity) WinMain
0x0000000142436D1A (Unity) __scrt_common_main_seh
0x00007FFF63EA3034 (KERNEL32) BaseThreadInitThunk
0x00007FFF66263691 (ntdll) RtlUserThreadStart