From 14c40b714a9b08d846b2b48ece0788bd47797cb9 Mon Sep 17 00:00:00 2001
From: "Neal H. Walfield" <neal@pep.foundation>
Date: Tue, 29 Jan 2019 09:46:23 +0100
Subject: ffi-macros: Improve assert_tag error message.

  - A wrapper object may be deallocated either if the object is
    freed *or* the object is moved.  Change the error message to
    mention both of these possibilities.
---
 ffi-macros/src/lib.rs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'ffi-macros/src/lib.rs')

diff --git a/ffi-macros/src/lib.rs b/ffi-macros/src/lib.rs
index 7bedb0ce..823798d9 100644
--- a/ffi-macros/src/lib.rs
+++ b/ffi-macros/src/lib.rs
@@ -311,7 +311,8 @@ fn derive_conversion_functions(st: &mut syn::ItemStruct, _: &str, _: &str,
                 if self.1 != #magic_value {
                     if self.1 == 0x5050505050505050 {
                         panic!(
-                            "FFI contract violation: Use-after-free detected");
+                            "FFI contract violation: \
+                             Use after move or use after free detected");
                     } else {
                         panic!(
                             "FFI contract violation: Wrong parameter type");
-- 
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