From c36b5dd01c2ff40cde07ed410d19e1c20e6137fc Mon Sep 17 00:00:00 2001
From: andy finch <andyfinch7@gmail.com>
Date: Tue, 30 Apr 2019 15:15:03 -0400
Subject: [PATCH] Make error in ast_util more informative. (#2252)

---
 tools/ts_library_builder/ast_util.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/ts_library_builder/ast_util.ts b/tools/ts_library_builder/ast_util.ts
index 14546f9c51..142b26c008 100644
--- a/tools/ts_library_builder/ast_util.ts
+++ b/tools/ts_library_builder/ast_util.ts
@@ -449,7 +449,7 @@ export function namespaceSourceFile(
           }
         } catch (e) {
           throw createDeclarationError(
-            "Unsupported import clause.",
+            `Unsupported import clause: ${e}`,
             declaration
           );
         }