minecraft crashes when you use invalid block id's

Reported exception thrown!
f: mouseClicked event handler
at bqq.a(SourceFile:433)
at bnb.a(SourceFile:64)
at bnb$$Lambda$157/1878871053.invoke(Unknown Source)
at org.lwjgl.glfw.GLFWMouseButtonCallbackI.callback(GLFWMouseButtonCallbackI.java:23)
at org.lwjgl.system.JNI.invokeV(Native Method)
at org.lwjgl.glfw.GLFW.glfwWaitEventsTimeout(GLFW.java:2599)
at bnj.a(SourceFile:294)
at bmz.b(SourceFile:846)
at bmz.a(SourceFile:380)
at net.minecraft.client.main.Main.main(SourceFile:140)
Caused by: g: Non [a-z0-9/._-] character in path of location: minecraft:stained_hardened_clay:14
at mw.<init>(SourceFile:32)
at mw.<init>(SourceFile:37)
at asy.a(SourceFile:143)
at bfk.a(SourceFile:121)
at bfk.b(SourceFile:137)
at bfk.a(SourceFile:156)
at bpy.a(SourceFile:59)
at bqn$1.a(SourceFile:168)
at boa.mouseClicked(SourceFile:102)
at bow.mouseClicked(SourceFile:44)
at bnb.b(SourceFile:64)
at bnb$$Lambda$214/1737577556.run(Unknown Source)
at bqq.a(SourceFile:428)
... 9 more

Superflat tag:
minecraft:stained_hardened_clay:14