comments not preserved

[pancelor]

A few weird cases I'm running into; I want to preserve comments in my file but am uncovering some bugs:

case 1

> echo -e 'if dev then --cool\n end' | shrinko8 - - -f lua -m --no-minify-comments --no-minify-spaces --const dev true

expected output: --cool
actual output: (nothing)

> echo '--cool' | shrinko8 - - -f lua -m --no-minify-comments --no-minify-spaces

expected output: --cool
actual output: (nothing)

case 2

test2.lua:

--[[something]]
if dev then
-- true
a=1
else
-- false
a=0
end

> shrinko8 test2.lua out.lua -m --no-minify-comments --no-minify-spaces --const dev true

In this case, the --true/--false comments are removed completely for some reason. But weirdly, this only happens when the --[[something]] comment exists -- remove it and the behavior is fine

case 3

test3.lua:

if dev then
-- true
a=1
else
-- false
a=0
end

> shrinko8 --minify --no-minify-spaces --no-minify-comments test3.lua - -f lua
if (n) e=1 else e=0

(expected output: comments should not be removed)

[thisismypassport]

I'm looking into it, but it's a bit tricky.
Case 1 is the one I'm least sure about - it's kinda arbitrary whether a comment is applied to an empty block (?!) or the removed "end".