From 7457478ab5223f2b99eda27a5439468a62ef4003 Mon Sep 17 00:00:00 2001
From: kzc <kzc@users.noreply.github.com>
Date: Sat, 15 May 2021 00:30:22 -0400
Subject: [PATCH] fix comment regarding invalid annotation handling (#4081)

---
 src/utils/pureComments.ts | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/utils/pureComments.ts b/src/utils/pureComments.ts
index bad56369326..bf95fb8fff8 100644
--- a/src/utils/pureComments.ts
+++ b/src/utils/pureComments.ts
@@ -32,8 +32,11 @@ function isOnlyWhitespaceOrComments(code: string) {
 		const ast = acorn.parse(code, { ecmaVersion: 'latest' }) as any;
 		return ast.body && ast.body.length === 0;
 	} catch {
-		// should never be reached -
-		// the entire module was previously successfully parsed
+		// should only be reached by invalid annotations like:
+		//
+		//   foo() /*@__PURE__*/ /* other */, bar();
+		//
+		// where `code` is " /* other */, "
 	}
 	return false;
 }