From d169c1a20029d512f3b257cc4f5a50d34278b042 Mon Sep 17 00:00:00 2001
From: Alec Larson <1925840+aleclarson@users.noreply.github.com>
Date: Fri, 25 Jun 2021 12:01:42 -0400
Subject: [PATCH] fix: throw a clearer error for non-existent sources

---
 packages/vite/src/node/server/sourcemap.ts | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/packages/vite/src/node/server/sourcemap.ts b/packages/vite/src/node/server/sourcemap.ts
index 65c57423206008..6b1ba9ee6c359c 100644
--- a/packages/vite/src/node/server/sourcemap.ts
+++ b/packages/vite/src/node/server/sourcemap.ts
@@ -20,7 +20,13 @@ export async function injectSourcesContent(
       if (!isVirtual) {
         sourcePath = path.resolve(sourceRoot, sourcePath)
       }
-      map.sourcesContent![i] = await fs.readFile(sourcePath, 'utf-8')
+      try {
+        map.sourcesContent![i] = await fs.readFile(sourcePath, 'utf-8')
+      } catch (e) {
+        throw new Error(
+          `Sourcemap for "${file}" has a non-existent source: "${sourcePath}"`
+        )
+      }
     })
   )
 }