From a2b0c1d8f39c01749821a4b25a2df8a313123176 Mon Sep 17 00:00:00 2001
From: Bugen Zhao <i@bugenzhao.com>
Date: Fri, 16 May 2025 13:51:05 +0800
Subject: [PATCH] chore: introduce `nightly` feature flag to provide error
 backtrace

Signed-off-by: Bugen Zhao <i@bugenzhao.com>
---
 crates/iceberg/Cargo.toml   | 2 ++
 crates/iceberg/src/error.rs | 7 +++++++
 crates/iceberg/src/lib.rs   | 1 +
 3 files changed, 10 insertions(+)

diff --git a/crates/iceberg/Cargo.toml b/crates/iceberg/Cargo.toml
index 471b0cbe9..463abdbb0 100644
--- a/crates/iceberg/Cargo.toml
+++ b/crates/iceberg/Cargo.toml
@@ -41,6 +41,8 @@ storage-s3 = ["opendal/services-s3"]
 async-std = ["dep:async-std"]
 tokio = ["tokio/rt-multi-thread"]
 
+nightly = []
+
 [dependencies]
 anyhow = { workspace = true }
 apache-avro = { workspace = true }
diff --git a/crates/iceberg/src/error.rs b/crates/iceberg/src/error.rs
index 88410826f..f2e42fc0d 100644
--- a/crates/iceberg/src/error.rs
+++ b/crates/iceberg/src/error.rs
@@ -211,6 +211,13 @@ impl std::error::Error for Error {
     fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
         self.source.as_ref().map(|v| v.as_ref())
     }
+
+    #[cfg(feature = "nightly")]
+    fn provide<'a>(&'a self, request: &mut std::error::Request<'a>) {
+        if self.backtrace.status() == BacktraceStatus::Captured {
+            request.provide_ref::<Backtrace>(&self.backtrace);
+        }
+    }
 }
 
 impl Error {
diff --git a/crates/iceberg/src/lib.rs b/crates/iceberg/src/lib.rs
index 556ff3e02..ddbb8c8f2 100644
--- a/crates/iceberg/src/lib.rs
+++ b/crates/iceberg/src/lib.rs
@@ -51,6 +51,7 @@
 //! }
 //! ```
 
+#![cfg_attr(feature = "nightly", feature(error_generic_member_access))]
 #![deny(missing_docs)]
 
 #[macro_use]