"GLSL compilation failed" exceptions are thrown after restarting the editor on changing Graphics APIs to OpenGLES2 in LWRP project.

Steps to repro:
1. Create a new LWRP Project.
2. File > Build Settings > Player Settings.
3. Other Settings > Uncheck "Auto-Graphics API for Window" checkbox.
4. Add OpenGLES2 > move to the top of the list > Restart the editor.

Actual Result:
GLSL compilation failed exception is thrown in the console.

Expected Result:
No error is thrown in the console.

Reproducible in: 2019.3.0a9, 2019.2.0b9, 2019.1.8f1
LWRP 6.9.0, 6.7.1, 6.5.2, 5.7.2
Post-processing 2.1.7, 2.1.6, 2.1.4, 2.1.3

Environment:
Windows.

Stack trace:
GLSL compilation failed:
0(199) : error C1008: undefined variable "inf"