New line inserted between ) and { in ClosingNextLine mode when line length is 99

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rustfmt formats inserts a newline between ) and { in this example:

pub fn test() {
    let xxxxxxxxxxxxxxxxxxxxxxxxxxxx = yyyyyyyyyyyyyyyy | zzzzzzzzzzzzzzzzzzzzzzzz | if for_writing
    {
        fffffffffffffffffffff
    }
    else {
        g
    };
}

When the let xxx… line has 99 characters.

I would expect a formatting like this (which rustfmt produces when adding one more x):

pub fn test() {
    let xxxxxxxxxxxxxxxxxxxxxxxxxxxxx =
        yyyyyyyyyyyyyyyy | zzzzzzzzzzzzzzzzzzzzzzzz | if for_writing {
            fffffffffffffffffffff
        }
        else {
            g
        };
}