Bug report: Debugger crash when using 4.6 backend

Dear all,

I've found a bug that prevents me from debugging my project anymore. Unity itself crashes again and again when a breakpoint is triggered. The project is a bit complex so I cannot upload it altogether, nor did I find any way to reproduce that in other projects. Yet, I've managed to debug Unity itself in x86 debugger, which shows the crash reason to be:

Assertion at ..\\mono\\mini\\method-to-ir.c:7604, condition `!sig->has_type_parameters' not met

Meanwhile, I've examined which method causes the JIT compiler to fail. Surprisingly it turns out to be UnityEngine.Component.GetComponentInParent<T>, not related to my code even for a bit. So it seems that's a Unity bug and I'm using the latest version of LTS release: 2017.4.6 since 2018.2 still don't have Substance's support for mobile platform (what a shame).

Full stacktrace is attached below.

Best Regards

 

Could you please submit a bug-report as explained in this document:
https://unity3d.com/unity/qa/bug-reporting

Posting crash bugs in the forum does not lead to any resolution in most cases. Unity will most likely not investigate the crash, if you don't submit a bug-report.