Fix class member completion crash in monorepo with baseUrl configuration

src/services/codefixes/importFixes.ts

@@ -280,18 +280,21 @@ function createImportAdderWorker(sourceFile: SourceFile | FutureSourceFile, prog
         addImport(first(info));
     }
 
-    function addImportFromExportedSymbol(exportedSymbol: Symbol, isValidTypeOnlyUseSite?: boolean, referenceImport?: ImportOrRequireAliasDeclaration) {
-        const moduleSymbol = Debug.checkDefined(exportedSymbol.parent, "Expected exported symbol to have module symbol as parent");
-        const symbolName = getNameForExportedSymbol(exportedSymbol, getEmitScriptTarget(compilerOptions));
-        const checker = program.getTypeChecker();
-        const symbol = checker.getMergedSymbol(skipAlias(exportedSymbol, checker));
-        const exportInfo = getAllExportInfoForSymbol(sourceFile, symbol, symbolName, moduleSymbol, /*preferCapitalized*/ false, program, host, preferences, cancellationToken);
-        if (!exportInfo) {
-            // If no exportInfo is found, this means export could not be resolved when we have filtered for autoImportFileExcludePatterns,
-            //     so we should not generate an import.
-            Debug.assert(preferences.autoImportFileExcludePatterns?.length);
-            return;
-        }
+    function addImportFromExportedSymbol(exportedSymbol: Symbol, isValidTypeOnlyUseSite?: boolean, referenceImport?: ImportOrRequireAliasDeclaration) {
+        const moduleSymbol = Debug.checkDefined(exportedSymbol.parent, "Expected exported symbol to have module symbol as parent");
+        const symbolName = getNameForExportedSymbol(exportedSymbol, getEmitScriptTarget(compilerOptions));
+        const checker = program.getTypeChecker();
+        const symbol = checker.getMergedSymbol(skipAlias(exportedSymbol, checker));
+        const exportInfo = getAllExportInfoForSymbol(sourceFile, symbol, symbolName, moduleSymbol, /*preferCapitalized*/ false, program, host, preferences, cancellationToken);
+        if (!exportInfo) {
+            // If no exportInfo is found, this can happen due to:
+            // 1. autoImportFileExcludePatterns filtering out the module
+            // 2. Complex module resolution scenarios where the symbol exists but cannot be imported
+            //    (e.g., in monorepos with multiple package installations where symbols from different
+            //    installations are not considered equivalent)
+            // In either case, we should not generate an import.
+            return;
+        }
         const useRequire = shouldUseRequire(sourceFile, program);
         let fix = getImportFixForSymbol(sourceFile, exportInfo, program, /*position*/ undefined, !!isValidTypeOnlyUseSite, useRequire, host, preferences);
         if (fix) {