Appended Cycles materials are not editable in Properties panel/Node Editor #48844

System Information
system-info.txt

Reproduced on Debian Stretch and multiple Windows 10 machines at work.

Blender Version
Broken: 9691202585

Short description of error
All fields of an appended Cycles material are greyed out and not editable in the Properties panel/Node editor

Exact steps for others to reproduce the error

open Blender and switch the render engine to cycles
append the material named "Green" from lib.blend
assign the material to any mesh
try to change the color or the roughness values of the material

Note that 9691202585 doesn't compile fleshly checked out because of a bug introduced a few commits before in d7da51b727, which got fixed later [here ]] and [ https:*developer.blender.org/diffusion/B/change/master/source/blender/blenkernel/intern/smoke.c;0ded953eea60ed362a92ef759abab39fb9c314db | here .

Attached below is a convenience patch which combines the build fixes above to get the broken commit compiling.
compile_fix.diff

Changed status to: 'Open'

Added subscriber: @cheleb

Added subscriber: @mont29

Yeah… again those ugly nodetrees directly used by other datablocks, and not being handled as 'real' IDs :(

In fact, BKE_library_make_local() was hacked around long time ago to address limitation of 'usual' make_local code, will rather fix this than try to twist into even more ugly hacks!

This issue was referenced by 39dee8a201

Changed status from 'Open' to: 'Resolved'

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Appended Cycles materials are not editable in Properties panel/Node Editor #48844