Steps to reproduce:

1) Download attached project ' TestStack.zip' and open in Unity
2) Make sure Scripting Backend - IL2CPP in Player Settings
3) Build and run project on a device
4) Press button 'Get Stack' to start a script
5) Check logs and you should see that StackTrace returns wrong values

Reproduced with:
5.3.7p2, 5.4.4f1, 5.5.0p3, 5.6.0b2

Note: Works fine with Mono2x
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Fixed in: 5.5.4p2