From 1631016b86193d4c419a2f946c79068bf8bf3800 Mon Sep 17 00:00:00 2001
From: Jack O'Connor <oconnor663@gmail.com>
Date: Tue, 18 Jan 2022 13:58:52 -0500
Subject: [PATCH] add a RAYON_NUM_THREADS=1 run to CI

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

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 26c670c..d7d754f 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -44,6 +44,11 @@ jobs:
       working-directory: ./tools/instruction_set_support
     # Default tests plus Rayon and RustCrypto trait implementations.
     - run: cargo test --features=rayon,traits-preview
+    # Same but with only one thread in the Rayon pool. This can find deadlocks.
+    - name: "again with RAYON_NUM_THREADS=1"
+      run: cargo test --features=rayon,traits-preview
+      env:
+        RAYON_NUM_THREADS: 1
     # no_std tests.
     - run: cargo test --no-default-features