crash on launch

[21:08:39 FATAL]: Fatal error launching game. Report this to http://bugs.mojang.com please!
java.io.FileNotFoundException: File '/home/robin/.minecraft/assets/indexes/legacy.json' does not exist
at org.apache.commons.io.FileUtils.openInputStream(FileUtils.java:299) ~[launcher.jar:?]
at org.apache.commons.io.FileUtils.readFileToString(FileUtils.java:1711) ~[launcher.jar:?]
at net.minecraft.launcher.Launcher.cleanupOrphanedAssets(Launcher.java:186) ~[launcher.jar:?]
at net.minecraft.launcher.Launcher.performCleanups(Launcher.java:421) ~[launcher.jar:?]
at net.minecraft.launcher.game.MinecraftGameRunner.launchGame(MinecraftGameRunner.java:217) ~[launcher.jar:?]
at com.mojang.launcher.game.runner.AbstractGameRunner.onDownloadJobFinished(AbstractGameRunner.java:177) [launcher.jar:?]
at com.mojang.launcher.updater.download.DownloadJob.popAndDownload(DownloadJob.java:122) [launcher.jar:?]
at com.mojang.launcher.updater.download.DownloadJob.access$000(DownloadJob.java:12) [launcher.jar:?]
at com.mojang.launcher.updater.download.DownloadJob$1.run(DownloadJob.java:86) [launcher.jar:?]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) [?:1.7.0_45]
at java.util.concurrent.FutureTask.run(FutureTask.java:262) [?:1.7.0_45]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [?:1.7.0_45]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [?:1.7.0_45]
at java.lang.Thread.run(Thread.java:744) [?:1.7.0_45]
[21:08:44 INFO]: Client> [21:08:44] [main/INFO]: Setting user: robmart
[21:08:44 INFO]: Client> [21:08:44] [main/INFO]: (Session ID is token:85bd60a012b94212b2ae2e718ac6275a:400c37ba43324f9d9efd99e26d4f7f22)
[21:08:46 INFO]: Client> [21:08:46] [Client thread/INFO]: LWJGL Version: 2.9.1
[21:08:47 INFO]: Client> If on Windows, make sure to provide all of the necessary dll's as specified in the twitchsdk README. Also, make sure to set the PATH environment variable to point to the directory containing the dll's.
[21:08:47 INFO]: Client> [21:08:47] [Client thread/ERROR]: Couldn't initialize twitch stream
[21:08:47 INFO]: Client> Mesa 8.0.4 implementation error: unexpected format GL_DEPTH_COMPONENT24 in _mesa_choose_tex_format()
[21:08:47 INFO]: Client> Please report at bugs.freedesktop.org
[21:08:47 INFO]: Client> #
[21:08:47 INFO]: Client> # A fatal error has been detected by the Java Runtime Environment:
[21:08:47 INFO]: Client> #
[21:08:47 INFO]: Client> # SIGFPE (0x8) at pc=0x0050e8f2, pid=2231, tid=3077581632
[21:08:47 INFO]: Client> #
[21:08:47 INFO]: Client> # JRE version: Java(TM) SE Runtime Environment (7.0_45-b18) (build 1.7.0_45-b18)
[21:08:47 INFO]: Client> # Java VM: Java HotSpot(TM) Client VM (24.45-b08 mixed mode linux-x86 )
[21:08:47 INFO]: Client> # Problematic frame:
[21:08:47 INFO]: Client> # C [i915_dri.so+0x168f2] intel_region_alloc+0x82
[21:08:47 INFO]: Client> #
[21:08:47 INFO]: Client> # Failed to write core dump. Core dumps have been disabled. To enable core dumping, try "ulimit -c unlimited" before starting Java again
[21:08:47 INFO]: Client> #
[21:08:47 INFO]: Client> # An error report file with more information is saved as:
[21:08:47 INFO]: Client> # /home/robin/.minecraft/hs_err_pid2231.log
[21:09:20 ERROR]: java.io.IOException: Stream closed
[21:09:20 ERROR]: java.io.IOException: Stream closed
[21:09:20 ERROR]: java.io.IOException: Stream closed
[21:09:20 ERROR]: java.io.IOException: Stream closed
[21:09:20 ERROR]: java.io.IOException: Stream closed
[21:09:20 ERROR]: java.io.IOException: Stream closed
[21:09:20 ERROR]: java.io.IOException: Stream closed
[21:09:20 ERROR]: java.io.IOException: Stream closed
[21:09:20 ERROR]: java.io.IOException: Stream closed
[21:09:20 ERROR]: java.io.IOException: Stream closed
[21:09:20 ERROR]: java.io.IOException: Stream closed
[21:09:20 ERROR]: java.io.IOException: Stream closed
[21:09:20 ERROR]: java.io.IOException: Stream closed
[21:09:20 ERROR]: java.io.IOException: Stream closed
[21:09:20 ERROR]: java.io.IOException: Stream closed
[21:09:20 ERROR]: java.io.IOException: Stream closed
[21:09:20 ERROR]: java.io.IOException: Stream closed
[21:09:20 ERROR]: java.io.IOException: Stream closed
[21:09:20 ERROR]: java.io.IOException: Stream closed
[21:09:20 ERROR]: java.io.IOException: Stream closed
[21:09:20 ERROR]: java.io.IOException: Stream closed
[21:09:20 ERROR]: java.io.IOException: Stream closed
[21:09:20 ERROR]: java.io.IOException: Stream closed
[21:09:20 ERROR]: java.io.IOException: Stream closed
[21:09:20 ERROR]: java.io.IOException: Stream closed
[21:09:20 ERROR]: java.io.IOException: Stream closed
[21:09:20 ERROR]: java.io.IOException: Stream closed
[21:09:20 ERROR]: java.io.IOException: Stream closed
[21:09:20 ERROR]: java.io.IOException: Stream closed
[21:09:20 ERROR]: java.io.IOException: Stream closed
[21:09:20 ERROR]: java.io.IOException: Stream closed
[21:09:20 ERROR]: java.io.IOException: Stream closed
[21:09:20 ERROR]: Game ended with bad state (exit code 139)
[21:09:20 INFO]: Ignoring visibility rule and showing launcher due to a game crash
[21:09:20 INFO]: Deleting /home/robin/.minecraft/versions/1.7.10/1.7.10-natives-1349397519878