From 4c4f8e10f8736427625b8140a1ece09b4bff58ea Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Wed, 22 Oct 2025 18:34:41 +0000
Subject: [PATCH 1/3] Initial plan


From 1d49c0f89f2257d1aee606fc5c7538ef7baa8327 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Wed, 22 Oct 2025 18:46:34 +0000
Subject: [PATCH 2/3] Add test case for chained method call with comment
 formatting panic

Co-authored-by: jakebailey <5341706+jakebailey@users.noreply.github.com>
---
 internal/format/api_test.go | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/internal/format/api_test.go b/internal/format/api_test.go
index 048d816f58..2ea16beedc 100644
--- a/internal/format/api_test.go
+++ b/internal/format/api_test.go
@@ -64,6 +64,37 @@ func TestFormat(t *testing.T) {
 		assert.Assert(t, len(newText) > 0)
 		assert.Assert(t, text != newText)
 	})
+
+	t.Run("chained method call with comment", func(t *testing.T) {
+		t.Parallel()
+		ctx := format.WithFormatCodeSettings(t.Context(), &format.FormatCodeSettings{
+			EditorSettings: format.EditorSettings{
+				TabSize:                4,
+				IndentSize:             4,
+				BaseIndentSize:         0,
+				NewLineCharacter:       "\n",
+				ConvertTabsToSpaces:    true,
+				IndentStyle:            format.IndentStyleSmart,
+				TrimTrailingWhitespace: true,
+			},
+			InsertSpaceBeforeTypeAnnotation: core.TSTrue,
+		}, "\n")
+
+		text := `foo
+	.bar()
+	// A second call
+	.baz();
+`
+		sourceFile := parser.ParseSourceFile(ast.SourceFileParseOptions{
+			FileName: "/test.ts",
+			Path:     "/test.ts",
+		}, text, core.ScriptKindTS)
+		
+		// This should not panic
+		edits := format.FormatDocument(ctx, sourceFile)
+		newText := applyBulkEdits(text, edits)
+		assert.Assert(t, len(newText) > 0)
+	})
 }
 
 func BenchmarkFormat(b *testing.B) {

From 0490a8f85ba90270f375c7f7178cfbb16f1c25c1 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Wed, 22 Oct 2025 18:50:08 +0000
Subject: [PATCH 3/3] Fix panic in formatting chained method calls with
 comments

The issue was that getIndentationForComment was not handling the case where
tokenIndentation is -1 (Unknown). In the TypeScript source, when tokenIndentation
is not Unknown, it returns tokenIndentation, otherwise it returns the base indentation.

This fixes the panic that occurred when formatting code like:
```
foo
  .bar()
  // A second call
  .baz();
```

Co-authored-by: jakebailey <5341706+jakebailey@users.noreply.github.com>
---
 internal/format/api_test.go | 3 ++-
 internal/format/span.go     | 3 +++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/internal/format/api_test.go b/internal/format/api_test.go
index 2ea16beedc..99b2c30ebd 100644
--- a/internal/format/api_test.go
+++ b/internal/format/api_test.go
@@ -90,10 +90,11 @@ func TestFormat(t *testing.T) {
 			Path:     "/test.ts",
 		}, text, core.ScriptKindTS)
 		
-		// This should not panic
+		// This should not panic (was panic'ing before fix with "negative Repeat count")
 		edits := format.FormatDocument(ctx, sourceFile)
 		newText := applyBulkEdits(text, edits)
 		assert.Assert(t, len(newText) > 0)
+		// The exact formatting is not important for this test, just that it doesn't panic
 	})
 }
 
diff --git a/internal/format/span.go b/internal/format/span.go
index c8d0096bed..3a1ea475cd 100644
--- a/internal/format/span.go
+++ b/internal/format/span.go
@@ -1093,6 +1093,9 @@ func (i *dynamicIndenter) getIndentationForComment(kind ast.Kind, tokenIndentati
 	case ast.KindCloseBraceToken, ast.KindCloseBracketToken, ast.KindCloseParenToken:
 		return i.indentation + i.getDelta(container)
 	}
+	if tokenIndentation != -1 {
+		return tokenIndentation
+	}
 	return i.indentation
 }