Fix incorrectly looking for position in call/new expression arguments when looking for indentation of type arguments

Fixes #32487

src/services/formatting/smartIndenter.ts

@@ -326,8 +326,9 @@ namespace ts.formatting {
         export function argumentStartsOnSameLineAsPreviousArgument(parent: Node, child: TextRangeWithKind, childStartLine: number, sourceFile: SourceFileLike): boolean {
             if (isCallOrNewExpression(parent)) {
                 if (!parent.arguments) return false;
-
-                const currentNode = Debug.assertDefined(find(parent.arguments, arg => arg.pos === child.pos));
+                const currentNode = find(parent.arguments, arg => arg.pos === child.pos);
+                // If its not one of the argument, dont look past this
+                if (!currentNode) return false;
                 const currentIndex = parent.arguments.indexOf(currentNode);
                 if (currentIndex === 0) return false; // Can't look at previous node if first
 

tests/cases/fourslash/formatTypeArgumentOnNewLine.ts

@@ -0,0 +1,18 @@
+/// <reference path="fourslash.ts"/>
+
+////const genericObject = new GenericObject<
+////  /*1*/{}
+////>();
+////const genericObject2 = new GenericObject2<
+////  /*2*/{},
+////  /*3*/{}
+////>();
+
+format.document();
+
+goTo.marker("1");
+verify.currentLineContentIs("    {}");
+goTo.marker("2");
+verify.currentLineContentIs("    {},");
+goTo.marker("3");
+verify.currentLineContentIs("    {}");