Launcher crashes if ~/.minecraft/launcher.jar exists before initial start

If ~/.minecraft/launcher.jar exists before the initial start (e.g. if you save MinecraftDev.jar to that file), after unpacking files, the launcher will crash with SIGSEGV (more precisely, SIGABRT in ZIP_GetEntry()).

Steps to reproduce:
1. cd ~/.minecraft
2. wget http://s3.amazonaws.com/Minecraft.Download/launcher/MinecraftDev.jar -O launcher.jar
3. java -jar launcher.jar