hs_err_pid9700.log
is this related with 3d skin layers ?

Why do HD skins never work?

Hm the 1.8.9/1.12 versions have to grab the skin from the gpu, and for that have to assume its 64x64. My guess is that you use a texture pack where the steve/alex skin are higher res than that, causing this crash.

Then don't load hd skins.

I didn't use any texture pack or shaders , and I have Custom Skin Loader

I think a test with only CSL mod is needed

This will happen if a player has a skin that is not 64x64(no matter how it is loaded, Resourcepack/Custom Skin Loader etc).

hs_err_pid7876.log
csl 128x skin's hserr is differ from that one
jvm.dll =\ ig8icd64.dll

Doesn't change the fact that hd skins wont work.