Fix a type bug in colorize function

This bug was introduced by dd2f1d7551bfd70357ad4f3fb180704194272147 and reported by @kilbith

diff --git a/builtin/common/misc_helpers.lua b/builtin/common/misc_helpers.lua
index 1d5b51fc65113e1ea5bf99b81544e3af573c911f..cf76fbde9fb3de233de2834269c8e95ed918d3fa 100644 (file)
--- a/builtin/common/misc_helpers.lua
+++ b/builtin/common/misc_helpers.lua
@@ -667,7 +667,7 @@ else
        end
 
        function core.colorize(color, message)
-               local lines = message:split("\n", true)
+               local lines = tostring(message):split("\n", true)
                local color_code = core.get_color_escape_sequence(color)
 
                for i, line in ipairs(lines) do