Fix crash on passing false as value in table to table.copy(t)

Fixes #2293.

diff --git a/builtin/common/misc_helpers.lua b/builtin/common/misc_helpers.lua
index deeba788ea49ae551e62c6b7f550b0556f1479c7..d9ebc39c3dbc5e618c3a6b0dcf13c5746397130f 100644 (file)
--- a/builtin/common/misc_helpers.lua
+++ b/builtin/common/misc_helpers.lua
@@ -545,12 +545,11 @@ function table.copy(t, seen)
        seen = seen or {}
        seen[t] = n
        for k, v in pairs(t) do
-               n[type(k) ~= "table" and k or seen[k] or table.copy(k, seen)] =
-                       type(v) ~= "table" and v or seen[v] or table.copy(v, seen)
+               n[(type(k) == "table" and (seen[k] or table.copy(k, seen))) or k] =
+                       (type(v) == "table" and (seen[v] or table.copy(v, seen))) or v
        end
        return n
 end
-
 --------------------------------------------------------------------------------
 -- mainmenu only functions
 --------------------------------------------------------------------------------