Fix: disable crash in settings by improving typing

src/UI/Base/SvelteUIElement.ts

@@ -25,12 +25,20 @@ export default class SvelteUIElement<
     private tag: "div" | "span" = "div"
     public readonly isSvelte = true
 
-    constructor(svelteElement, props?: Props, events?: Events, slots?: Slots) {
+    constructor(svelteElement : {
+        new (args: {
+            target: HTMLElement
+            props: Props
+            events?: Events
+            slots?: Slots
+        }): SvelteComponentTyped<Props, Events, Slots>
+    }, props?: Props, events?: Events, slots?: Slots) {
         super()
         this._svelteComponent = <any>svelteElement
         this._props = props ?? <Props>{}
         this._events = events
         this._slots = slots
+        console.trace("Constructing a special stack element")
     }
 
     public setSpan() {

src/UI/Base/ToSvelte.svelte

@@ -31,7 +31,7 @@
   })
 </script>
 
-{#if isSvelte}
+{#if svelteElem?._svelteComponent}
   {#if svelteElem.getClass() || svelteElem.getStyle()}
     <svelte:component
       this={svelteElem?._svelteComponent}

src/UI/SpecialVisualisations/SettingsVisualisations.ts

@@ -17,6 +17,7 @@ import { Feature } from "geojson"
 import LayerConfig from "../../Models/ThemeConfig/LayerConfig"
 import QrCode from "../Popup/QrCode.svelte"
 import ClearGPSHistory from "../BigComponents/ClearGPSHistory.svelte"
+import DisabledQuestions from "../Popup/DisabledQuestions.svelte"
 
 class LanguagePickerVis extends SpecialVisualizationSvelte {
     funcName = "language_picker"
@@ -40,7 +41,7 @@ class LanguagePickerVis extends SpecialVisualizationSvelte {
     }
 }
 
-class DisabledQuestions extends SpecialVisualizationSvelte {
+class DisabledQuestionsVis extends SpecialVisualizationSvelte {
     funcName = "disabled_questions"
     group = "settings"
     docs = "Shows which questions are disabled for every layer. Used in 'settings'"
@@ -234,7 +235,7 @@ export class SettingsVisualisations {
         return [
             new LanguagePickerVis(),
 
-            new DisabledQuestions(),
+            new DisabledQuestionsVis(),
             new GyroscopeAllTags(),
             new GpsAllTags(),
             new StorageAlLTags(),

src/Utils.ts

@@ -1630,7 +1630,12 @@ In the case that MapComplete is pointed to the testing grounds, the edit will be
             ;[_, functionName, path, line, column] = matchWithFuncName
         } else {
             const regexNoFuncName: RegExp = new RegExp("at ([a-zA-Z0-9-/.]+):([0-9]+):([0-9]+)")
-            ;[_, path, line, column] = stackItem.match(regexNoFuncName)
+            try {
+                [_, path, line, column] = stackItem.match(regexNoFuncName)
+            } catch (e) {
+                console.error("Could not match a stack item:", stackItem)
+                return undefined
+            }
         }
 
         const markdownLocation = path.substring(path.indexOf("MapComplete/src") + 11) + "#L" + line