diff --git a/editors/code/src/client.ts b/editors/code/src/client.ts
index 6f2d48d1d56..aec5c70c076 100644
--- a/editors/code/src/client.ts
+++ b/editors/code/src/client.ts
@@ -138,7 +138,7 @@ export function createClient(serverPath: string, cwd: string, extraEnv: Env): lc
                                 command: "rust-analyzer.applyActionGroup",
                                 title: "",
                                 arguments: [items.map((item) => {
-                                    return { label: item.title, arguments: item.command.arguments[0] };
+                                    return { label: item.title, arguments: item.command!.arguments![0] };
                                 })],
                             };
 
diff --git a/editors/code/src/debug.ts b/editors/code/src/debug.ts
index 3c113e46eb2..c72a7b27888 100644
--- a/editors/code/src/debug.ts
+++ b/editors/code/src/debug.ts
@@ -87,12 +87,14 @@ async function getDebugConfiguration(ctx: Ctx, runnable: ra.Runnable): Promise<v
     if (ctx.config.debug.openDebugPane) {
         debugOutput.show(true);
     }
-
-    const isMultiFolderWorkspace = vscode.workspace.workspaceFolders.length > 1;
-    const firstWorkspace = vscode.workspace.workspaceFolders[0]; // folder exists or RA is not active.
+    // folder exists or RA is not active.
+    // eslint-disable-next-line @typescript-eslint/no-unnecessary-type-assertion
+    const workspaceFolders = vscode.workspace.workspaceFolders!;
+    const isMultiFolderWorkspace = workspaceFolders.length > 1;
+    const firstWorkspace = workspaceFolders[0];
     const workspace = !isMultiFolderWorkspace || !runnable.args.workspaceRoot ?
         firstWorkspace :
-        vscode.workspace.workspaceFolders.find(w => runnable.args.workspaceRoot?.includes(w.uri.fsPath)) || firstWorkspace;
+        workspaceFolders.find(w => runnable.args.workspaceRoot?.includes(w.uri.fsPath)) || firstWorkspace;
 
     const wsFolder = path.normalize(workspace.uri.fsPath);
     const workspaceQualifier = isMultiFolderWorkspace ? `:${workspace.name}` : '';
diff --git a/editors/code/src/run.ts b/editors/code/src/run.ts
index 4f0d2884b03..331f85cd3cb 100644
--- a/editors/code/src/run.ts
+++ b/editors/code/src/run.ts
@@ -146,7 +146,8 @@ export async function createTask(runnable: ra.Runnable, config: Config): Promise
         overrideCargo: runnable.args.overrideCargo,
     };
 
-    const target = vscode.workspace.workspaceFolders[0]; // safe, see main activate()
+    // eslint-disable-next-line @typescript-eslint/no-unnecessary-type-assertion
+    const target = vscode.workspace.workspaceFolders![0]; // safe, see main activate()
     const cargoTask = await tasks.buildCargoTask(target, definition, runnable.label, args, config.cargoRunner, true);
     cargoTask.presentationOptions.clear = true;
 
diff --git a/editors/code/src/snippets.ts b/editors/code/src/snippets.ts
index 7b7e528f6fa..dc53ebe2eeb 100644
--- a/editors/code/src/snippets.ts
+++ b/editors/code/src/snippets.ts
@@ -62,6 +62,8 @@ function parseSnippet(snip: string): [string, [number, number]] | undefined {
     const m = snip.match(/\$(0|\{0:([^}]*)\})/);
     if (!m) return undefined;
     const placeholder = m[2] ?? "";
+    if (m.index == null)
+        return undefined;
     const range: [number, number] = [m.index, placeholder.length];
     const insert = snip.replace(m[0], placeholder);
     return [insert, range];