From 547d12ca58f8fc9503dabf24202230a2d11cd299 Mon Sep 17 00:00:00 2001
From: Nick Rolfe <nickrolfe@github.com>
Date: Thu, 29 Oct 2020 15:13:04 +0000
Subject: [PATCH] Add more info to error message

---
 extractor/src/extractor.rs | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/extractor/src/extractor.rs b/extractor/src/extractor.rs
index 8d98c61b04b..143aeccf8a8 100644
--- a/extractor/src/extractor.rs
+++ b/extractor/src/extractor.rs
@@ -234,7 +234,11 @@ impl Visitor<'_> {
                     for (index, child_id) in child_ids.iter().enumerate() {
                         if !*has_index && index > 0 {
                             error!(
-                                "saw multiple occurrences of field that should occur at most once"
+                                "{}:{}: too many values for field: {}::{}",
+                                &self.path,
+                                node.start_position().row,
+                                node.kind(),
+                                &field.get_name()
                             );
                             break;
                         }