From 0c42916fa9e280a06abb870b135cf81f5450e157 Mon Sep 17 00:00:00 2001
From: houseme <housemecn@gmail.com>
Date: Wed, 25 Mar 2026 17:03:21 +0800
Subject: [PATCH] ci(build): enable tokio_unstable flag in Build RustFS job
 (#2289)

---
 .github/workflows/build.yml | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index bf881e4d0..b3226e3a9 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -204,7 +204,11 @@ jobs:
     runs-on: ${{ matrix.os }}
     timeout-minutes: 60
     env:
-      RUSTFLAGS: ${{ matrix.rustflags }}
+      # Always enable Tokio unstable features (required by dial9-tokio-telemetry).
+      # The RUSTFLAGS env var takes precedence over .cargo/config.toml [build] rustflags,
+      # so we must include --cfg tokio_unstable here explicitly; otherwise an empty
+      # RUSTFLAGS value would shadow the config-file flag and silently break tracing.
+      RUSTFLAGS: "--cfg tokio_unstable ${{ matrix.rustflags }}"
     strategy:
       fail-fast: false
       matrix: ${{ fromJson(needs.prepare-platform-matrix.outputs.matrix) }}