From e5d1b9ca3927ea5cdfadd43c86a9f5d24671fb93 Mon Sep 17 00:00:00 2001
From: Nick Cameron <ncameron@mozilla.com>
Date: Wed, 8 Mar 2017 15:06:53 +1300
Subject: [PATCH] save-analysis: cope with lack of method data after a type
 error

Fixes #39957
---
 src/librustc_save_analysis/lib.rs | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/librustc_save_analysis/lib.rs b/src/librustc_save_analysis/lib.rs
index b1e435dcc751c..4298024e12d7e 100644
--- a/src/librustc_save_analysis/lib.rs
+++ b/src/librustc_save_analysis/lib.rs
@@ -387,7 +387,10 @@ impl<'l, 'tcx: 'l> SaveContext<'l, 'tcx> {
                     }
                 }
                 None => {
-                    span_bug!(span, "Could not find container for method {}", id);
+                    debug!("Could not find container for method {} at {:?}", id, span);
+                    // This is not necessarily a bug, if there was a compilation error, the tables
+                    // we need might not exist.
+                    return None;
                 }
             },
         };