From ee49ec0d49049fcbe99c7d7940e85b6b085a8eaa Mon Sep 17 00:00:00 2001
From: David Tolnay <dtolnay@gmail.com>
Date: Tue, 13 Sep 2022 11:51:11 -0700
Subject: [PATCH] Add impl Provider in build.rs probe

---
 build.rs | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/build.rs b/build.rs
index 7bfdca1..3800683 100644
--- a/build.rs
+++ b/build.rs
@@ -17,7 +17,7 @@ compile_error! {
 const PROBE: &str = r#"
     #![feature(error_generic_member_access, provide_any)]
 
-    use std::any::Demand;
+    use std::any::{Demand, Provider};
     use std::backtrace::{Backtrace, BacktraceStatus};
     use std::error::Error;
     use std::fmt::{self, Display};
@@ -39,6 +39,12 @@ const PROBE: &str = r#"
         }
     }
 
+    struct P;
+
+    impl Provider for P {
+        fn provide<'a>(&'a self, _demand: &mut Demand<'a>) {}
+    }
+
     const _: fn() = || {
         let backtrace: Backtrace = Backtrace::capture();
         let status: BacktraceStatus = backtrace.status();