Julia is still really a community driven project. We do not have a large tech company with nearly infinite resources developing Julia. An important aspect about the bug you found is that it has a work around.
As others have mentioned, the bug appears to be in a relatively esoteric part of Julia, the parser, that is written in FemtoLISP. There’s really only a single person that fully understands it.
One idea is that perhaps we should rewrite the parser in Julia itself. This is what @c42f has done with JuliaSyntax.jl:
Given limited time and resources, we could try to fix the bug you found or we could spend that time switching to a parser that is less esoteric. At the moment, I am very curious if JuliaSyntax.jl suffers from the same bug. Understanding that might actually help us figure out how to solve the original bug that you reported.