Pin Rust toolchain version to v1.66

stefanlippuner · stefanlippuner · commit a82581364d1b · 2023-09-30T11:15:05.000+02:00
Newer toolchains cause stack overflow errors in some tests. That may be related to a memory alignment change in Rust v1.67 (rust-lang/rust#102750)
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
@@ -14,7 +14,7 @@ jobs:
         uses: actions-rs/toolchain@v1
         with:
           profile: minimal
-          toolchain: stable
+          toolchain: 1.66
           override: true
           components: rustfmt, clippy
 
@@ -43,7 +43,7 @@ jobs:
         uses: actions-rs/toolchain@v1
         with:
           profile: minimal
-          toolchain: stable
+          toolchain: 1.66
           override: true
           components: rustfmt, clippy
 
diff --git a/rust-toolchain.toml b/rust-toolchain.toml
@@ -0,0 +1,3 @@
+[toolchain]
+channel = "1.66"
+
