fix some double free, memory leaks, and seg faults

test.ar

@@ -17,8 +17,10 @@
 "🇬🇧"
 "hello\u0000world"
 
+1.24323234e2312324
+
 let a, 
-    b = 1, 
+    b = "hello", 
     c, 
     d = 42, 
     temp_result, 
@@ -57,7 +59,7 @@ else term.log("bruh")
 
 
 
-mm=1/2/4/2/4354/534/534//534//3422*404203420234+3432423324&&430234230||4320423040230423^384239423043024923%4432042304920.3432423423
+mm=x/2/4/2/4354/534/534//534//3422*404203420234+3432423324&&430234230||4320423040230423^384239423043024923%4432042304920.3432423423
 
 let x = [
     'hello world',
@@ -68,7 +70,7 @@ let x = [
 term.log(x[0:1:1])
 
 let y = {
-    'hello':10,
+    'hello':test,
     world:'nice'
 }