When I had created a profile in the Minecraft Launcher version of 2.0.806, with the Minecraft version of both Alpha 1.1.2_01 and Alpha 1.2.3_01 and run it, the launcher crashes. I cannot identify the cause of such an error as Windows 10 did not inform me of any issue, it stated "A problem caused the program to stop working correctly."
I believe that this bug should be fixed for those who wish to experience some nostalgia.
Unable to reproduce, make sure you use a seperate folder for ancient versions.