From 325d3c374afbf9c631edc5387c8358f72d2387c7 Mon Sep 17 00:00:00 2001
From: Erika <3019731+Princesseuh@users.noreply.github.com>
Date: Fri, 7 Jul 2023 15:39:10 +0200
Subject: [PATCH] Fix usage of fragments in TSX (#783)

* test: add test for fragment in TSX

* fix(#782): fix compiler crash on tsx fragment

* chore: add changeset

---------

Co-authored-by: Nate Moore <nate@astro.build>
---
 .changeset/rotten-elephants-refuse.md |  5 +++++
 internal/printer/print-to-tsx.go      |  5 ++++-
 packages/compiler/test/tsx/basic.ts   | 10 ++++++++++
 3 files changed, 19 insertions(+), 1 deletion(-)
 create mode 100644 .changeset/rotten-elephants-refuse.md

diff --git a/.changeset/rotten-elephants-refuse.md b/.changeset/rotten-elephants-refuse.md
new file mode 100644
index 000000000..825141fea
--- /dev/null
+++ b/.changeset/rotten-elephants-refuse.md
@@ -0,0 +1,5 @@
+---
+'@astrojs/compiler': patch
+---
+
+[TSX] fix compiler crash when file only contains an unamed fragment
diff --git a/internal/printer/print-to-tsx.go b/internal/printer/print-to-tsx.go
index 1d9d88c8d..9ed5ceb02 100644
--- a/internal/printer/print-to-tsx.go
+++ b/internal/printer/print-to-tsx.go
@@ -421,12 +421,15 @@ declare const Astro: Readonly<import('astro').AstroGlobal<%s>>`, props.Ident)
 	if len(n.Attr) == 0 {
 		endLoc = n.Loc[0].Start + len(n.Data) - 1
 	}
+	if endLoc == -1 {
+		endLoc = 0
+	}
 	isSelfClosing := false
 	tmpLoc := endLoc
 	if len(p.sourcetext) > tmpLoc {
 		for i := 0; i < len(p.sourcetext[tmpLoc:]); i++ {
 			c := p.sourcetext[endLoc : endLoc+1][0]
-			if c == '/' && p.sourcetext[endLoc+1:][0] == '>' {
+			if c == '/' && len(p.sourcetext) > endLoc+1 && p.sourcetext[endLoc+1:][0] == '>' {
 				isSelfClosing = true
 				break
 			} else if c == '>' {
diff --git a/packages/compiler/test/tsx/basic.ts b/packages/compiler/test/tsx/basic.ts
index 8ad19002e..57e3d6b62 100644
--- a/packages/compiler/test/tsx/basic.ts
+++ b/packages/compiler/test/tsx/basic.ts
@@ -204,4 +204,14 @@ export default function __AstroComponent_(_props: Record<string, any>): any {}\n
   assert.snapshot(code, output, `expected code to match snapshot`);
 });
 
+test('fragment with no name', async () => {
+  const input = '<>+0123456789</>';
+  const output = `<Fragment>
+<>+0123456789</>
+</Fragment>
+export default function __AstroComponent_(_props: Record<string, any>): any {}\n`;
+  const { code } = await convertToTSX(input, { sourcemap: 'external' });
+  assert.snapshot(code, output, `expected code to match snapshot`);
+});
+
 test.run();