Fix scoping with mutable variables

test/tests/scope checkpoint mutable error.lua

@@ -0,0 +1,99 @@
+local _={}
+_[44]={}
+_[43]={}
+_[42]={}
+_[41]={}
+_[40]={}
+_[39]={}
+_[38]={}
+_[37]={}
+_[36]={}
+_[35]={}
+_[34]={}
+_[33]={}
+_[32]={}
+_[31]={}
+_[30]={tags=_[44],text="[1, 2, 3]"}
+_[29]={tags=_[43],text="l: "}
+_[28]={tags=_[42],text="AFTER ERROR"}
+_[27]={tags=_[41],text="CHECK"}
+_[26]={tags=_[40],text="[1, 2, 3]"}
+_[25]={tags=_[39],text=" "}
+_[24]={tags=_[38],text="[1, 2, 3]"}
+_[23]={tags=_[37],text="f1: "}
+_[22]={tags=_[36],text="REC"}
+_[21]={tags=_[35],text="CHECK"}
+_[20]={tags=_[34],text="[1, 2]"}
+_[19]={tags=_[33],text=" "}
+_[18]={tags=_[32],text="[1, 2]"}
+_[17]={tags=_[31],text="f1: "}
+_[16]={_[29],_[30]}
+_[15]={_[28]}
+_[14]={_[27]}
+_[13]={_[23],_[24],_[25],_[26]}
+_[12]={_[22]}
+_[11]={_[21]}
+_[10]={_[17],_[18],_[19],_[20]}
+_[9]={"return"}
+_[8]={"text",_[16]}
+_[7]={"text",_[15]}
+_[6]={"error","t; in Lua function \"error\"; at test/tests/scope checkpoint mutable error.ans:25; at test/tests/scope checkpoint mutable error.ans:19; at test/tests/scope checkpoint mutable error.ans:29"}
+_[5]={"text",_[14]}
+_[4]={"text",_[13]}
+_[3]={"text",_[12]}
+_[2]={"text",_[11]}
+_[1]={"text",_[10]}
+return {_[1],_[2],_[3],_[4],_[5],_[6],_[7],_[8],_[9]}
+--[[
+{ "text", { {
+      tags = {},
+      text = "f1: "
+    }, {
+      tags = {},
+      text = "[1, 2]"
+    }, {
+      tags = {},
+      text = " "
+    }, {
+      tags = {},
+      text = "[1, 2]"
+    } } }
+{ "text", { {
+      tags = {},
+      text = "CHECK"
+    } } }
+{ "text", { {
+      tags = {},
+      text = "REC"
+    } } }
+{ "text", { {
+      tags = {},
+      text = "f1: "
+    }, {
+      tags = {},
+      text = "[1, 2, 3]"
+    }, {
+      tags = {},
+      text = " "
+    }, {
+      tags = {},
+      text = "[1, 2, 3]"
+    } } }
+{ "text", { {
+      tags = {},
+      text = "CHECK"
+    } } }
+{ "error", 't; in Lua function "error"; at test/tests/scope checkpoint mutable error.ans:25; at test/tests/scope checkpoint mutable error.ans:19; at test/tests/scope checkpoint mutable error.ans:29' }
+{ "text", { {
+      tags = {},
+      text = "AFTER ERROR"
+    } } }
+{ "text", { {
+      tags = {},
+      text = "l: "
+    }, {
+      tags = {},
+      text = "[1, 2, 3]"
+    } } }
+{ "return" }
+]]--