[MCL-8400] Potential Crash From Launcher For Screenshot

Ok, let me try this again, cause I think I categorized it in the wrong section and please can we discuss it first before closing the issue.

I do not know why but when I try to load 17w43a and 1743b from my launcher it loads correctly then the launcher vanishes but the game crashes and kicks me back to the launcher, which sucks cause I would like to try out the new snapshots, does this happen to anybody else?
Basically I can download the stuff needed and sometimes the bar goes funny and crashes or it boots up and crashes, I do want to point out tis just the snapshots version the release version work fines as did the last snapshot I used its just the new ones that crash the game.

[1026/011742:INFO:GameCallbacks.cpp(178)] launcher/launcher (main) info Exception in thread "main" joptsimple.OptionArgumentConversionException: Cannot parse argument '--height' of option width
	at joptsimple.AbstractOptionSpec.convertWith(AbstractOptionSpec.java:92)
	at joptsimple.ArgumentAcceptingOptionSpec.convert(ArgumentAcceptingOptionSpec.java:277)
	at joptsimple.OptionSet.valuesOf(OptionSet.java:223)
	at joptsimple.OptionSet.valueOf(OptionSet.java:172)
	at net.minecraft.client.main.Main.main(SourceFile:90)
Caused by: joptsimple.internal.ReflectionException: java.lang.NumberFormatException: For input string: "--height"
	at joptsimple.internal.Reflection.reflectionException(Reflection.java:136)
	at joptsimple.internal.Reflection.invoke(Reflection.java:118)
	at joptsimple.internal.MethodInvokingValueConverter.convert(MethodInvokingValueConverter.java:48)
	at joptsimple.internal.Reflection.convertWith(Reflection.java:124)
	at joptsimple.AbstractOptionSpec.convertWith(AbstractOptionSpec.java:90)
	... 4 more
Caused by: java.lang.NumberFormatException: For input string: "--height"
	at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
	at java.lang.Integer.parseInt(Integer.java:580)
	at java.lang.Integer.valueOf(Integer.java:766)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:483)
	at joptsimple.internal.Reflection.invoke(Reflection.java:116)
	... 7 more