Street Level: a geocoder that throws fails show_street_level at its location stage

A provider that threw while geocoding (offline, an upstream down) escaped
the action as a bare error. show_street_level now reports it as its
location stage ("Could not arrive at …", the cause in detail), and nothing
is switched or looked up; fly_to_location itself is unchanged.

src/voice/gevActions.js

@@ -3961,19 +3961,28 @@ async function requestStreetLevel(
   if (atViewCentre || (args.fly === false && hasCoordinates)) {
     if (hasCoordinates) point = { lat: latitude, lon: longitude };
   } else {
-    location = await runGevAction(
-      'fly_to_location',
-      {
-        ...(entity
-          ? { entity }
-          : hasCoordinates
-            ? { latitude, longitude }
-            : { query }),
-        viewMode: 'close',
-        waitForArrival: true,
-      },
-      runOptions,
-    );
+    try {
+      location = await runGevAction(
+        'fly_to_location',
+        {
+          ...(entity
+            ? { entity }
+            : hasCoordinates
+              ? { latitude, longitude }
+              : { query }),
+          viewMode: 'close',
+          waitForArrival: true,
+        },
+        runOptions,
+      );
+    } catch (error) {
+      // A geocoder that throws (offline, a provider down) is this stage's
+      // failure too, not an error past the action.
+      return fail('location', `Could not arrive at ${label}`, {
+        cancelled: !current(),
+        detail: String(error?.message || error),
+      });
+    }
     if (location?.ok !== true || !current())
       return fail(
         'location',

src/voice/gevActions.test.mjs

@@ -7005,6 +7005,25 @@ test('show_street_level tells a failed enable, a delisted source, a key refused
   assert.deepEqual(unconfigured.order, [], 'nothing changed');
 });
 
+test('show_street_level reports a geocoder that throws as its location stage', async () => {
+  globalThis.window = globalThis.window || { clearTimeout, setTimeout, requestIdleCallback: null };
+  const h = createStreetLevelHarness({ enabled: true, activeStack: 'osm' });
+  const runner = createGevActionRunner({
+    viewer: createVoiceNavigationHarness().viewer,
+    styleManager: { mapStackController: { getActiveId: () => 'osm' }, setMapStack: async () => ({ ok: true }) },
+    dataManager: h.dataManager,
+    placeSearch: {
+      geocode: async () => {
+        throw new Error('geocoder unreachable');
+      },
+    },
+  });
+  const result = await runner('show_street_level', { query: 'Capitol Mall', provider: 'mapillary' });
+  assert.deepEqual([result.ok, result.stage], [false, 'location']);
+  assert.equal(result.error, 'Could not arrive at Capitol Mall');
+  assert.deepEqual(h.order.filter((step) => /^(params|open|arm)/.test(step)), [], 'nothing switched or looked up');
+});
+
 test('show_street_level reports a flight that lands without a position', async () => {
   globalThis.window = globalThis.window || { clearTimeout, setTimeout, requestIdleCallback: null };
   const hit = createStreetLevelHarness({ enabled: true, activeStack: 'osm' });