Steps to reproduce:
1) Open the attached project.
2) Build for iOS.
3) Run on a device.

The app crashes in around 2 seconds, while showing splash screen, approximately 1 out of 5 times with the following stack trace:
* thread #41: tid = 0xcb812, 0x000000010010b890 ProductName`::JValue__ctor_m708074237(__this=0x000000010868ba50, ___value0=0x0000000109f9a5f0, method=<unavailable>) + 156 at Bulk_Assembly-CSharp-firstpass_0.cpp:51608, stop reason = EXC_BAD_ACCESS (code=1, address=0x0)
* frame #0: 0x000000010010b890 ProductName`::JValue__ctor_m708074237(__this=0x000000010868ba50, ___value0=0x0000000109f9a5f0, method=<unavailable>) + 156 at Bulk_Assembly-CSharp-firstpass_0.cpp:51608 [opt]

This doesn't occur with Mono2x and on Android.

Reproduced on:
5.6.0b4, 6.5.0p4, 5.4.4p1