fix(sourcemap): tolerate virtual modules in sources array (#5587)

packages/vite/src/node/server/sourcemap.ts

@@ -8,6 +8,11 @@ const debug = createDebugger('vite:sourcemap', {
   onlyWhenFocused: true
 })
 
+// Virtual modules should be prefixed with a null byte to avoid a
+// false positive "missing source" warning. We also check for certain
+// prefixes used for special handling in esbuildDepPlugin.
+const virtualSourceRE = /^(\0|dep:|browser-external:)/
+
 interface SourceMapLike {
   sources: string[]
   sourcesContent?: (string | null)[]
@@ -30,7 +35,7 @@ export async function injectSourcesContent(
   const missingSources: string[] = []
   map.sourcesContent = await Promise.all(
     map.sources.map((sourcePath) => {
-      if (sourcePath) {
+      if (sourcePath && !virtualSourceRE.test(sourcePath)) {
         sourcePath = decodeURI(sourcePath)
         if (sourceRoot) {
           sourcePath = path.resolve(sourceRoot, sourcePath)