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util.debug: Fix potential traceback

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This commit is contained in:
Matthew Wild 2011-11-19 22:40:30 +00:00
parent 5785bdb7b6
commit 0f23c0b491
1 changed files with 6 additions and 4 deletions
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10
util/debug.lua
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@ -20,10 +20,12 @@ end
local function get_upvalues_table(func)
local upvalues = {};
for upvalue_num = 1, math.huge do
local name, value = debug.getupvalue(func, upvalue_num);
if not name then break; end
table.insert(upvalues, { name = name, value = value });
if func then
for upvalue_num = 1, math.huge do
local name, value = debug.getupvalue(func, upvalue_num);
if not name then break; end
table.insert(upvalues, { name = name, value = value });
end
end
return upvalues;
end