How to reproduce:
1. Open the attached project "GraphViewCrash.zip"
2. Open "Graph Editor" (Graph Editor>Graph Editor)
3. Enter Play Mode

Reproducible with: 2019.4.25f1, 2020.3.6f1, 2021.1.5f1, 2021.2.0a15
Could not test with: 2018.4.34f1 (GraphView is unavailable)

First lines of the stack trace:
SymInit: Symbol-SearchPath: '.;C:\Users\EvaldasBudreckis\AppData\Local\Programs\unity-multi-tool;D:\ProgramFiles\2021.1.4f1\Editor\Data\Tools;C:\Windows;C:\Windows\system32;SRV*C:\websymbols*http://msdl.microsoft.com/download/symbols;', symOptions: 534, UserName: 'EvaldasBudreckis'
OS-Version: 10.0.0
D:\ProgramFiles\2021.1.4f1\Editor\Unity.exe:Unity.exe (00007FF6E8DC0000), size: 81920000 (result: 0), SymType: '-nosymbols-', PDB: 'D:\ProgramFiles\2021.1.4f1\Editor\Unity.exe', fileVersion: 2021.1.4.11037
C:\Windows\SYSTEM32\ntdll.dll:ntdll.dll (00007FFEC6710000), size: 2052096 (result: 0), SymType: '-exported-', PDB: 'C:\Windows\SYSTEM32\ntdll.dll', fileVersion: 10.0.19041.928
C:\Windows\System32\KERNEL32.DLL:KERNEL32.DLL (00007FFEC56B0000), size: 774144 (result: 0), SymType: '-exported-', PDB: 'C:\Windows\System32\KERNEL32.DLL', fileVersion: 10.0.19041.928
C:\Windows\System32\KERNELBASE.dll:KERNELBASE.dll (00007FFEC4350000), size: 2916352 (result: 0), SymType: '-exported-', PDB: 'C:\Windows\System32\KERNELBASE.dll', fileVersion: 10.0.19041.906
C:\Windows\System32\CRYPT32.dll:CRYPT32.dll (00007FFEC4140000), size: 1437696 (result: 0), SymType: '-exported-', PDB: 'C:\Windows\System32\CRYPT32.dll', fileVersion: 10.0.19041.844
C:\Windows\System32\ucrtbase.dll:ucrtbase.dll (00007FFEC3F30000), size: 1048576 (result: 0), SymType: '-exported-', PDB: 'C:\Windows\System32\ucrtbase.dll', fileVersion: 10.0.19041.789
C:\Windows\System32\USER32.dll:USER32.dll (00007FFEC54B0000), size: 1703936 (result: 0), SymType: '-exported-', PDB: 'C:\Windows\System32\USER32.dll', fileVersion: 10.0.19041.906
C:\Windows\System32\win32u.dll:win32u.dll (00007FFEC4670000), size: 139264 (result: 0), SymType: '-exported-', PDB: 'C:\Windows\System32\win32u.dll', fileVersion: 10.0.19041.906

Notes:
- May take several times entering Play Mode to crash
- Workaround: comment out line 31 in GraphEditorView.cs: myGraphView.FrameAll();