Currently looking for reproduction steps on this one, it happened after a shader graph shader failed to compile.

Basically the list of shaders to choose from becomes annoyingly huge as what shader functions (perhaps specific nodes) are added to this list of shaders that a material can choose from.

2018.2 w/ HDMasterMerge

Kink3d commented 17 days ago
Afaik this is not actually a bug. Its because of the regression tests in the repository. Each one generates a shader and we have one for each individual math node (with all the other nodes coming soon, so its only going to get worse).

The plus side is these wont exist in packages, the downside is this is incredibly annoying. Need a solution.