Parser fails when encountering `let` block inside incorrectly-terminated `let` block

[topolarity]

let m = 2
foo bar

let m = 2
end

┌ Error: JuliaSyntax parser failed — falling back to flisp!
│   exception =
│    BoundsError: attempt to access 0-element Vector{Any} at index [1]
│    Stacktrace:
│      [1] getindex
│        @ Base ./essentials.jl:13 [inlined]
│      [2] _internal_node_to_Expr(source::Base.JuliaSyntax.SourceFile, srcrange::UnitRange{Int64}, head::Base.JuliaSyntax.SyntaxHead, childranges::Vector{UnitRange{Int64}}, childheads::Vector{Base.JuliaSyntax.SyntaxHead}, args::Vector{Any})
│        @ Base.JuliaSyntax ~/repos/julia/base/JuliaSyntax/src/expr.jl:401
│      [3] _to_expr(node::Base.JuliaSyntax.SyntaxNode)
│        @ Base.JuliaSyntax ~/repos/julia/base/JuliaSyntax/src/expr.jl:499
│      [4] _to_expr(node::Base.JuliaSyntax.SyntaxNode) (repeats 3 times)
│        @ Base.JuliaSyntax ~/repos/julia/base/JuliaSyntax/src/expr.jl:498
│      [5] Expr(node::Base.JuliaSyntax.SyntaxNode)
│        @ Base.JuliaSyntax ~/repos/julia/base/JuliaSyntax/src/expr.jl:503
│      [6] core_parser_hook(code::String, filename::String, lineno::Int64, offset::Int64, options::Symbol)
│        @ Base.JuliaSyntax ~/repos/julia/base/JuliaSyntax/src/hooks.jl:209
│      [7] invoke_in_world(::UInt64, ::Any, ::Any, ::Vararg{Any}; kwargs::@Kwargs{})
│        @ Base ./essentials.jl:933
│      [8] invoke_in_world(::UInt64, ::Any, ::Any, ::Vararg{Any})
│        @ Base ./essentials.jl:930
│      [9] (::Base.JuliaSyntax.var"#invoke_fixedworld#122"{Base.JuliaSyntax.var"#invoke_fixedworld#119#123"{typeof(Base.JuliaSyntax.core_parser_hook), UInt64}})(::String, ::Vararg{Any}; kws::@Kwargs{})
│        @ Base.JuliaSyntax ~/repos/julia/base/JuliaSyntax/src/hooks.jl:118
│     [10] (::Base.JuliaSyntax.var"#invoke_fixedworld#122"{Base.JuliaSyntax.var"#invoke_fixedworld#119#123"{typeof(Base.JuliaSyntax.core_parser_hook), UInt64}})(::String, ::Vararg{Any})
│        @ Base.JuliaSyntax ~/repos/julia/base/JuliaSyntax/src/hooks.jl:117
│     [11] _parse_string(text::String, filename::String, lineno::Int64, index::Int64, options::Symbol)
│        @ Base.Meta ./meta.jl:200
│     [12] #parseall#6
│        @ Base.Meta ./meta.jl:294 [inlined]
│     [13] parseall
│        @ Base.Meta ./meta.jl:293 [inlined]
│     [14] include_string(mapexpr::typeof(identity), mod::Module, code::String, filename::String)
│        @ Base ./loading.jl:2063
│     [15] _include(mapexpr::Function, mod::Module, _path::String)
│        @ Base ./loading.jl:2137
│     [16] include(mod::Module, _path::String)
│        @ Base ./Base.jl:497
│     [17] exec_options(opts::Base.JLOptions)
│        @ Base ./client.jl:317
│     [18] _start()
│        @ Base ./client.jl:554
│   offset = 0
│   code = "let m = 2\nfoo bar\n\nlet m = 2 \nend\n"
└ @ Base.JuliaSyntax ~/repos/julia/base/JuliaSyntax/src/hooks.jl:258

[c42f]

Thanks for the bug report! This was fixed in #371