weird windows panic

calc.go

@@ -261,7 +261,7 @@ func (c *Calc) Eval(line string) {
 				continue
 			}
 
-			if exists(c.Funcalls, item) {
+			if _, ok := c.Funcalls[item]; ok {
 				if err := c.DoFuncall(item); err != nil {
 					fmt.Println(err)
 				} else {
@@ -270,18 +270,20 @@ func (c *Calc) Eval(line string) {
 				continue
 			}
 
-			if exists(c.BatchFuncalls, item) {
-				if !c.batch {
+			if c.batch {
+				if _, ok := c.BatchFuncalls[item]; ok {
+					if err := c.DoFuncall(item); err != nil {
+						fmt.Println(err)
+					} else {
+						c.Result()
+					}
+					continue
+				}
+			} else {
+				if _, ok := c.BatchFuncalls[item]; ok {
 					fmt.Println("only supported in batch mode")
 					continue
 				}
-
-				if err := c.DoFuncall(item); err != nil {
-					fmt.Println(err)
-				} else {
-					c.Result()
-				}
-				continue
 			}
 
 			if contains(c.LuaFunctions, item) {
@@ -302,22 +304,22 @@ func (c *Calc) Eval(line string) {
 			}
 
 			// internal commands
-			if exists(c.Commands, item) {
+			if _, ok := c.Commands[item]; ok {
 				c.Commands[item].Func(c)
 				continue
 			}
 
-			if exists(c.ShowCommands, item) {
+			if _, ok := c.ShowCommands[item]; ok {
 				c.ShowCommands[item].Func(c)
 				continue
 			}
 
-			if exists(c.StackCommands, item) {
+			if _, ok := c.StackCommands[item]; ok {
 				c.StackCommands[item].Func(c)
 				continue
 			}
 
-			if exists(c.SettingsCommands, item) {
+			if _, ok := c.SettingsCommands[item]; ok {
 				c.SettingsCommands[item].Func(c)
 				continue
 			}
@@ -505,7 +507,7 @@ func (c *Calc) PutVar(name string) {
 }
 
 func (c *Calc) GetVar(name string) {
-	if exists(c.Vars, name) {
+	if _, ok := c.Vars[name]; ok {
 		c.Debug(fmt.Sprintf("retrieve %.2f from %s", c.Vars[name], name))
 		c.stack.Backup()
 		c.stack.Push(c.Vars[name])
@@ -518,10 +520,8 @@ func sortcommands(hash Commands) []string {
 	keys := make([]string, 0, len(hash))
 
 	for key := range hash {
-		if len(key) > 1 {
 		keys = append(keys, key)
 	}
-	}
 
 	sort.Strings(keys)
 

main.go

@@ -30,7 +30,7 @@ import (
 	lua "github.com/yuin/gopher-lua"
 )
 
-const VERSION string = "2.0.12"
+const VERSION string = "2.0.11"
 
 const Usage string = `This is rpn, a reverse polish notation calculator cli.
 

util.go

@@ -23,24 +23,16 @@ import (
 	"strings"
 )
 
-// find an item in a list, generic variant
-func contains[E comparable](s []E, v E) bool {
-	for _, vs := range s {
-		if v == vs {
+// find an item in a list
+func contains(s []string, e string) bool {
+	for _, a := range s {
+		if a == e {
 			return true
 		}
 	}
 	return false
 }
 
-// look if a key in a map exists, generic variant
-func exists[K comparable, V any](m map[K]V, v K) bool {
-	if _, ok := m[v]; ok {
-		return true
-	}
-	return false
-}
-
 func const2num(name string) float64 {
 	switch name {
 	case "Pi":