util.cache: Make sure cache size is specified as an integer

1 files changed, 2 insertions, 0 deletions

diff --git a/util/cache.lua b/util/cache.lua
index 9453697c..32670751 100644
--- a/util/cache.lua
+++ b/util/cache.lua
@@ -2,6 +2,8 @@ local cache_methods = {};
 local cache_mt = { __index = cache_methods };
 
 local function new(size)
+	size = assert(tonumber(size), "cache size must be a number");
+	size = math.floor(size);
 	assert(size > 0, "cache size must be greater than zero");
 	local data = {};
 	return setmetatable({ data = data, count = 0, size = size, head = nil, tail = nil }, cache_mt);