try nightly rustc

Author: Bengt Lofgren

.github/workflows/solana.yml

@@ -60,7 +60,7 @@ jobs:
           solana-cli-version: "1.18.15"
           anchor-version: "0.30.1"
       - name: Set default Rust toolchain
-        run: rustup default stable
+        run: rustup default nightly
         working-directory: ./solana
       - name: Pin setup-node to v3.8.2
         uses: actions/[email protected]