Fix LuaJIT compatibility

test/run.lua

@@ -144,7 +144,22 @@ else
 	for _, file in ipairs(files) do
 		local filebase = file:match("^(.*)%.ans$")
 		local namespace = filebase:match("([^/]*)$")
-		math.randomseed(0)
+		-- simple random to get the same result across lua versions
+		local prev = 0
+		local function badrandom(a, b)
+			prev = (42424242424242 * prev + 242) % 2^32
+			return a + prev % (b-a+1)
+		end
+		function math.random(a, b)
+			if not a and not b then
+				return badrandom(0, 999) / 1000
+			elseif not b then
+				return badrandom(1, a)
+			else
+				return badrandom(a, b)
+			end
+		end
+		-- load vm
 		local vm = anselme()
 		vm:setaliases("seen", "checkpoint", "reached")
 		vm:loadfunction {

test/tests/function random.lua

@@ -4,11 +4,11 @@ _[20]={}
 _[19]={}
 _[18]={}
 _[17]={}
-_[16]={tags=_[21],text="a"}
-_[15]={tags=_[20],text="a"}
-_[14]={tags=_[19],text="b"}
-_[13]={tags=_[18],text="a"}
-_[12]={tags=_[17],text="b"}
+_[16]={text="a",tags=_[21]}
+_[15]={text="b",tags=_[20]}
+_[14]={text="b",tags=_[19]}
+_[13]={text="c",tags=_[18]}
+_[12]={text="c",tags=_[17]}
 _[11]={_[16]}
 _[10]={_[15]}
 _[9]={_[14]}
@@ -24,11 +24,11 @@ return {_[1],_[2],_[3],_[4],_[5],_[6]}
 --[[
 { "text", { {
       tags = {},
-      text = "b"
+      text = "c"
     } } }
 { "text", { {
       tags = {},
-      text = "a"
+      text = "c"
     } } }
 { "text", { {
       tags = {},
@@ -36,7 +36,7 @@ return {_[1],_[2],_[3],_[4],_[5],_[6]}
     } } }
 { "text", { {
       tags = {},
-      text = "a"
+      text = "b"
     } } }
 { "text", { {
       tags = {},