Incorrect unused binding lint in do block

[BenPH]

line in the do block below gets linted as unused.

For copy paste

function f()
    local line
    open("path") do io
        line = readline(io)
    end
    line
end

[grahamgill]

Interestingly, in this example

function test_this()
    local u
    local v::Int
    
    try
        u = 1
        v = 2
    catch
        @warn "Unexpected!"
    end
    
    v
end

function test_that()
    local x
    local y::Int
    
    let
        x = 1
        y = 2
    end
    
    x + y
end

contrary to expectations, u gets no unused warning, whereas v, x and y all get unused warnings, as indicated by the greyed out variable names in the screen shot try and let scope blocks below.

Calling the functions, we get test_this() == 2 and test_that() == 3 as expected.

This is with vscode 1.75.1, julia-vscode 1.38.2, Julia 1.8.5.