Treat rustc warnings as errors in CI

ci/test-stable-perf.sh

@@ -9,6 +9,7 @@ if ! ci/version-check.sh stable; then
   ci/version-check.sh stable
 fi
 export RUST_BACKTRACE=1
+export RUSTFLAGS="-D warnings"
 
 ./fetch-perf-libs.sh
 export LD_LIBRARY_PATH=$PWD/target/perf-libs:/usr/local/cuda/lib64:$LD_LIBRARY_PATH

ci/test-stable.sh

@@ -4,6 +4,7 @@ cd "$(dirname "$0")/.."
 
 ci/version-check.sh stable
 export RUST_BACKTRACE=1
+export RUSTFLAGS="-D warnings"
 
 _() {
   echo "--- $*"