Skip missing nodes in formatting (microsoft#48953)

Author: andrewbranch

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;

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");