Using a resource pack with a block model with itself as a parent removes all textures

Is there something written in the logfile while loading that resource pack ?

First this:

cxb$c: nullcxb$c: null at cxb.a(SourceFile:295) ~[18w22c.jar:?] at cxb.a(SourceFile:299) ~[18w22c.jar:?] at cxb.b(SourceFile:289) ~[18w22c.jar:?] at dhg.l(SourceFile:653) ~[18w22c.jar:?] at dhg.a(SourceFile:221) ~[18w22c.jar:?] at dhh.a(SourceFile:23) ~[18w22c.jar:?] at uq.c(SourceFile:123) ~[18w22c.jar:?] at uq.a(SourceFile:106) ~[18w22c.jar:?] at cio.f(SourceFile:652) [18w22c.jar:?] at cos$2.a(SourceFile:65) [18w22c.jar:?] at cjp.mouseClicked(SourceFile:103) [18w22c.jar:?] at ckl.mouseClicked(SourceFile:45) [18w22c.jar:?] at ciq.b(SourceFile:67) [18w22c.jar:?] at ciq$$Lambda$756/500268044.run(Unknown Source) [18w22c.jar:?] at cmf.a(SourceFile:429) [18w22c.jar:?] at ciq.a(SourceFile:67) [18w22c.jar:?] at ciq$$Lambda$678/6650683.invoke(Unknown Source) [18w22c.jar:?] at org.lwjgl.glfw.GLFWMouseButtonCallbackI.callback(GLFWMouseButtonCallbackI.java:23) [lwjgl-glfw-3.1.2.jar:?] at org.lwjgl.system.JNI.invokeV(Native Method) ~[lwjgl-3.1.2.jar:?] at org.lwjgl.glfw.GLFW.glfwWaitEventsTimeout(GLFW.java:2599) [lwjgl-glfw-3.1.2.jar:?] at ciy.a(SourceFile:298) [18w22c.jar:?] at cio.c(SourceFile:844) [18w22c.jar:?] at cio.a(SourceFile:380) [18w22c.jar:?] at net.minecraft.client.main.Main.main(SourceFile:144) [18w22c.jar:?]

Then one of these for every texture in the game:

[12:39:58] [Client thread/WARN]: Failed to load texture: minecraft:textures/gui/title/background/panorama_5.png[12:39:58] [Client thread/WARN]: Failed to load texture: minecraft:textures/gui/title/background/panorama_5.pngjava.io.FileNotFoundException: minecraft:textures/gui/title/background/panorama_5.png at uq.a(SourceFile:61) ~[18w22c.jar:?] at dfn.a(SourceFile:23) ~[18w22c.jar:?] at dfs.a(SourceFile:60) [18w22c.jar:?] at dfs.a(SourceFile:134) [18w22c.jar:?] at uq.c(SourceFile:123) [18w22c.jar:?] at uq.a(SourceFile:106) [18w22c.jar:?] at cio.f(SourceFile:659) [18w22c.jar:?] at cos$2.a(SourceFile:65) [18w22c.jar:?] at cjp.mouseClicked(SourceFile:103) [18w22c.jar:?] at ckl.mouseClicked(SourceFile:45) [18w22c.jar:?] at ciq.b(SourceFile:67) [18w22c.jar:?] at ciq$$Lambda$756/500268044.run(Unknown Source) [18w22c.jar:?] at cmf.a(SourceFile:429) [18w22c.jar:?] at ciq.a(SourceFile:67) [18w22c.jar:?] at ciq$$Lambda$678/6650683.invoke(Unknown Source) [18w22c.jar:?] at org.lwjgl.glfw.GLFWMouseButtonCallbackI.callback(GLFWMouseButtonCallbackI.java:23) [lwjgl-glfw-3.1.2.jar:?] at org.lwjgl.system.JNI.invokeV(Native Method) ~[lwjgl-3.1.2.jar:?] at org.lwjgl.glfw.GLFW.glfwWaitEventsTimeout(GLFW.java:2599) [lwjgl-glfw-3.1.2.jar:?] at ciy.a(SourceFile:298) [18w22c.jar:?] at cio.c(SourceFile:844) [18w22c.jar:?] at cio.a(SourceFile:380) [18w22c.jar:?] at net.minecraft.client.main.Main.main(SourceFile:144) [18w22c.jar:?]

Then one of these for every sound event:

[12:39:58] [Client thread/WARN]: Missing sound for event: minecraft:ambient.cave

Then one of these for every block model and variant:

[12:39:59] [Client thread/ERROR]: Encountered an exception when loading model definition of model minecraft:blockstates/stone.json : java.io.FileNotFoundException: minecraft:blockstates/stone.json
[12:39:59] [Client thread/WARN]: Unable to load variant: normal from minecraft:stone#normal

Then one of these for every item model:

[12:40:03] [Client thread/WARN]: Unable to load item model: 'minecraft:item/end_portal_frame' for item: 'minecraft:end_portal_frame': java.io.FileNotFoundException: minecraft:models/item/end_portal_frame.json

Then one of these for every item model:

[12:40:05] [Client thread/WARN]: Missing model for: minecraft:item/carrot_on_a_stick

So ya, a lot in the log 😉

The resourcepack now gives:

[21:40:44] [main/WARN].(BlockModel.java:169): Found 'parent' loop while loading model 'minecraft:block/ice' in chain: minecraft:item/ice -> minecraft:block/ice -> minecraft:block/ice