Put the summary of the bug you're having here

What I expected to happen was...:
My resource pack would equip.

What actually happened was...:
Nothing.

Steps to Reproduce:
1. Try to load a resource pack

Note:
The launcher said this while starting up:

[11:37:18] [Client thread/INFO]: Caught error stitching, removing all assigned resourcepacks
java.lang.NullPointerException
at bxq.a(SourceFile:304) ~[1.9-pre2.jar:?]
at bxq.d(SourceFile:289) ~[1.9-pre2.jar:?]
at bxq.c(SourceFile:237) ~[1.9-pre2.jar:?]
at bxq.a(SourceFile:168) ~[1.9-pre2.jar:?]
at bxr.a(SourceFile:23) ~[1.9-pre2.jar:?]
at bwk.c(SourceFile:105) ~[1.9-pre2.jar:?]
at bwk.a(SourceFile:93) ~[1.9-pre2.jar:?]
at bce.f(SourceFile:720) [1.9-pre2.jar:?]
at bgx.a(SourceFile:133) [1.9-pre2.jar:?]
at bfa.a(SourceFile:341) [1.9-pre2.jar:?]
at bgx.a(SourceFile:141) [1.9-pre2.jar:?]
at bfa.k(SourceFile:404) [1.9-pre2.jar:?]
at bgx.k(SourceFile:77) [1.9-pre2.jar:?]
at bfa.p(SourceFile:381) [1.9-pre2.jar:?]
at bce.t(SourceFile:1569) [1.9-pre2.jar:?]
at bce.av(SourceFile:955) [1.9-pre2.jar:?]
at bce.a(SourceFile:392) [1.9-pre2.jar:?]
at net.minecraft.client.main.Main.main(SourceFile:124) [1.9-pre2.jar:?]