Bug: Fillet Button - selecting edge without tag caused an Error rev2 (#3690)

* typos

* typos2

* trigger ci

src/lang/modifyAst/addFillet.ts

@@ -469,6 +469,9 @@ export const hasValidFilletSelection = ({
       if (segmentNode.node.type === 'CallExpression') {
         const segmentName = segmentNode.node.callee.name
         if (segmentName in sketchLineHelperMap) {
+          // Add check whether the tag exists at all:
+          if (!(segmentNode.node.arguments.length === 3)) return true
+          // If the tag exists, check if it is already filleted
           const edges = isTagUsedInFillet({
             ast,
             callExp: segmentNode.node,