Incorrect command crashes azkaban

[keith]

Running the command azkaban available color_scheme, which is missing the --type parameter crashes azkaban.

The relevant part of the stacktrace:

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0   libswiftCore.dylib              0x000000010258421f swift_unknownRetain + 31
1   azkaban                         0x00000001022899f0 _TTWC9Commander10UsageErrors23CustomStringConvertibleS_FS1_g11descriptionSS + 48
2   libswiftCore.dylib              0x00000001024748a7 _TFs15_print_unlockedu0_R_s16OutputStreamTyperFTxRq__T_ + 903
3   libswiftCore.dylib              0x000000010244e7d0 _TFSSCurfT26stringInterpolationSegmentx_SS + 64
4   azkaban                         0x0000000102298868 _TFE9CommanderPS_11CommandType3runfTGSqSS__T_ + 6216
5   azkaban                         0x00000001022701dc main + 188
6   libdyld.dylib                   0x00007fff878e95ad start + 1

[neonichu]

😱

[neonichu]

Looks like this is an issue in Commander, so closing this as a related PR has been opened.

[keith]

🎉 thanks