From 55f2504fc0a3326854f1bfdf24ae829c06dfc2b8 Mon Sep 17 00:00:00 2001
From: Andrew Branch <andrew@wheream.io>
Date: Wed, 4 May 2022 10:23:26 -0700
Subject: [PATCH] Skip missing nodes in formatting

---
 src/services/formatting/formatting.ts      | 4 ++++
 tests/cases/fourslash/formatV8Directive.ts | 7 +++++++
 2 files changed, 11 insertions(+)
 create mode 100644 tests/cases/fourslash/formatV8Directive.ts

diff --git a/src/services/formatting/formatting.ts b/src/services/formatting/formatting.ts
index cc5e2b6c41c46..b3e84023d175a 100644
--- a/src/services/formatting/formatting.ts
+++ b/src/services/formatting/formatting.ts
@@ -691,6 +691,10 @@ namespace ts.formatting {
                 isListItem: boolean,
                 isFirstListItem?: boolean): number {
 
+                if (nodeIsMissing(child)) {
+                    return inheritedIndentation;
+                }
+
                 const childStartPos = child.getStart(sourceFile);
 
                 const childStartLine = sourceFile.getLineAndCharacterOfPosition(childStartPos).line;
diff --git a/tests/cases/fourslash/formatV8Directive.ts b/tests/cases/fourslash/formatV8Directive.ts
new file mode 100644
index 0000000000000..515ef57c7ca96
--- /dev/null
+++ b/tests/cases/fourslash/formatV8Directive.ts
@@ -0,0 +1,7 @@
+/// <reference path="fourslash.ts" />
+// @Filename: foo.js
+//// function foo() {}
+//// /*1*/%PrepareFunctionForOptimization(foo)/*2*/;
+
+// Don't really care what it does beyond not crashing
+format.selection("1", "2");