Steps to reproduce:
1) Open the attached project.
2) Build and run (Windows, macOS, iOS).
3) Once the scene loads, press the button on the screen.

A crash occurs while loading custom LWRP shaders upon switching the scene.
If the scene containing the shaders is loaded on startup, the crash does not occur.
Reproduces with OpenGL, Metal and DirectX 11.0.

Reproduced on:
2018.2.10f1, 2018.2.8f1

Did not reproduce:
2019.1.0a2

On 2018.3, the scene does not start loading upon pressing the button, but errors are spammed to console on each frame (Xcode):
blueshadercrashdebug[21592:1803773] Execution of the command buffer was aborted due to an error during execution. Ignored (for causing prior/excessive GPU errors) (IOAF code 4)

Tested on:
MacBook Pro (Retina, 15-inch, Mid 2015) macOS 10.13.6
iPhone 8 Plus iOS 12.0
Windows 10