1 files changed, 7 insertions, 2 deletions
diff --git a/editors/code/src/toolchain.ts b/editors/code/src/toolchain.ts
index 917a1d6b099..b2c0c669db2 100644
--- a/editors/code/src/toolchain.ts
+++ b/editors/code/src/toolchain.ts
@@ -4,6 +4,8 @@ import * as path from "path";
 import * as readline from "readline";
 import * as vscode from "vscode";
 import { execute, log, memoizeAsync } from "./util";
+import { unwrapNullable } from "./nullable";
+import { unwrapUndefinable } from "./undefinable";
 
 interface CompilationArtifact {
     fileName: string;
@@ -93,7 +95,8 @@ export class Cargo {
             throw new Error("Multiple compilation artifacts are not supported.");
         }
 
-        return artifacts[0].fileName;
+        const artifact = unwrapUndefinable(artifacts[0]);
+        return artifact.fileName;
     }
 
     private async runCargo(
@@ -142,7 +145,9 @@ export async function getRustcId(dir: string): Promise<string> {
     const data = await execute(`${rustcPath} -V -v`, { cwd: dir });
     const rx = /commit-hash:\s(.*)$/m;
 
-    return rx.exec(data)![1];
+    const result = unwrapNullable(rx.exec(data));
+    const first = unwrapUndefinable(result[1]);
+    return first;
 }
 
 /** Mirrors `toolchain::cargo()` implementation */