How to reproduce:
1. Create a new project
2. Add the Memory Profiler package to the project
3. Open the Memory Profiler Window (Window -> Analysis -> Memory Profiler)
4. Capture the Editor once, wait for a second for it to complete and capture the Editor again
5. Observe the crash

Expected result: Another memory snapshot is taken without any issues
Actual result: Editor crashes

Reproduced in: 2019.3.0a7 (With Memory Profiler version: 0.1.0-preview.6)
Not reproducible with: 2019.2.0b7, 2019.1.7f1, 2018.4.3f1 (With Memory Profiler version: 0.1.0-preview.6)

Notes:
- Reproduces both when taking Player snapshots and Editor snapshots.
- Only reproduces after installing the package for the first time, for instance, if the package was installed and the Editor was immediately closed and reopened the crash no longer reproduces when taking memory snapshots.