Markdown parser fails for tables with no first entry

[Ellipse0934]

julia> using Markdown

julia> md"""|   | 1 | 2 |    # fails to parse as table
            |:-:|:--|--:|
            |3  |4  |5  |"""
  | | 1 | 2 | |:-:|:–|–:| |3 |4 |5 |

julia> md"""| 0 |   |   |
            |:-:|:--|--:|
            |3  |4  |5  |"""
  0    
  – – –
  3 4 5

julia> md"""| 0 |   |   |
            |:-:|:--|--:|
            |   |4  |5  |"""
  0    
  – – –
    4 5

[p1scescom]

Tables which have empty first column of markdown fail. Its reason is this line.

julia/stdlib/Markdown/src/GitHub/table.jl

Line 48 in b00802b

isempty(row[1]) && return false

I sought this line's blame. But I cannot find why it fails.
Maybe it has to fail in this case, but I think this line isn't necessary.
And GitHub markdown allows empty first column.

	second column
empty	first column