From b00963ffde2e27dea41c311b2b01f7cae5f799be Mon Sep 17 00:00:00 2001
From: mofeiZ <34200447+mofeiZ@users.noreply.github.com>
Date: Wed, 25 Jan 2023 11:23:09 -0500
Subject: [PATCH] [playground] Handle invariant violation errors

playground currently hard crashes when we hit an invariant violation

<img width="1104" alt="image"
src="https://user-images.githubusercontent.com/34200447/214615036-dbe307d8-132d-4186-a8ab-6fcaf69801d1.png">

[playground
link](https://0xeac7-forget.vercel.app/#eyJzb3VyY2UiOiJcbmZ1bmN0aW9uIHVzZUJhcihwcm9wcykge1xuICBwcm9wcyA9IG51bGw7XG4gIGxldCB5LCB6O1xuXG4gIGlmIChwcm9wcy54KSB7XG4gICAgbGV0IHkgPSB1c2VGb28ocHJvcHMuYS5iKTtcbiAgICB3aGlsZSAoYmFyKCkpIHtcbiAgICAgIGlmIChwcm9wcy55KSB7XG4gICAgICAgIHogPSBiYXooKTtcbiAgICAgIH1cbiAgICB9XG4gIH1cblxuICByZXR1cm4gW3ksIHpdXG59In0=)

This should fix that
---
 .../forget/packages/playground/components/Editor/index.tsx   | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/compiler/forget/packages/playground/components/Editor/index.tsx b/compiler/forget/packages/playground/components/Editor/index.tsx
index 26837ed606..9cea6e046a 100644
--- a/compiler/forget/packages/playground/components/Editor/index.tsx
+++ b/compiler/forget/packages/playground/components/Editor/index.tsx
@@ -67,6 +67,11 @@ function compile(source: string): CompilerOutput {
     return { kind: "ok", results };
   } catch (error: any) {
     console.error(error);
+    // error might be an invariant violation or other runtime error
+    // (i.e. object shape that is not CompilerError)
+    if (error.details == null) {
+      error.details = [];
+    }
     return { kind: "err", error };
   }
 }