Repro steps:
1. Open "unity_monodevelop_crush.zip"
2. Open gamedata.jsn (Assets>StreamingAssets>gamedata)
3. Open Mono Develop
4. Reimport all assets in Unity (Editor hangs)
5. In Mono Develop attach debugger to Unity process and press "Pause" multiples times
6. In windows Task Manager kill "Charon.exe" process

Stack trace:
g_logv
g_log

Actual: Crash caused by Charon.exe and Mono Develop with attached debugger
Expected: Crash should not occur

Reproduced on: 5.3.7f1, 5.4.0f3, 5.5.0b11
Did not reproduce on: 5.2.4f1 (only Mono Develop hangs once you kill Charon.exe works fine)
Regression begins with 5.3