From 94a08d594b05c577aab888721986daa7f9a1bd5e Mon Sep 17 00:00:00 2001
From: Alex Trotta <ahajha@gmail.com>
Date: Tue, 19 May 2026 20:15:58 -0400
Subject: [PATCH 1/2] ci: circumvent AVX512 issue on GHA runners

---
 .bazelrc                  | 5 +++++
 .github/workflows/ci.yaml | 5 ++++-
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/.bazelrc b/.bazelrc
index e0087b2..7cd02b9 100644
--- a/.bazelrc
+++ b/.bazelrc
@@ -6,3 +6,8 @@ info --platforms=@platforms//host
 
 common --platforms=@mojo_host_platform
 common --host_platform=@mojo_host_platform
+
+# HACK: Github Action runners using AMD EPYC 9V74 CPUs have AVX512 disabled.
+# Mojo will happily generate those instructions, but then they crash at runtime.
+# Totally disable AVX512 to circumvent the issue.
+common:ci --//:mojo_copt=--target-features=-avx512f,-avx512bw,-avx512cd,-avx512dq,-avx512vl,-avx512ifma,-avx512vbmi,-avx512vbmi2,-avx512vnni,-avx512bitalg,-avx512vpopcntdq,-avx512fp16,-avx512bf16
diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 1815eba..3cf696e 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -32,4 +32,7 @@ jobs:
         run: |
           bazel version
           bazel info
-      - run: bazel test //...
+      - name: CPU Info
+        run: |
+          lscpu
+      - run: bazel test --config=ci //...

From 01fc5fc5b86e56c860e60b8db82d564ceb1187ee Mon Sep 17 00:00:00 2001
From: Alex Trotta <ahajha@gmail.com>
Date: Tue, 19 May 2026 20:22:30 -0400
Subject: [PATCH 2/2] fix

---
 .bazelrc                  | 2 +-
 .github/workflows/ci.yaml | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/.bazelrc b/.bazelrc
index 7cd02b9..f951763 100644
--- a/.bazelrc
+++ b/.bazelrc
@@ -7,7 +7,7 @@ info --platforms=@platforms//host
 common --platforms=@mojo_host_platform
 common --host_platform=@mojo_host_platform
 
-# HACK: Github Action runners using AMD EPYC 9V74 CPUs have AVX512 disabled.
+# HACK: Github Action runners using AMD EPYC CPUs have AVX512 disabled.
 # Mojo will happily generate those instructions, but then they crash at runtime.
 # Totally disable AVX512 to circumvent the issue.
 common:ci --//:mojo_copt=--target-features=-avx512f,-avx512bw,-avx512cd,-avx512dq,-avx512vl,-avx512ifma,-avx512vbmi,-avx512vbmi2,-avx512vnni,-avx512bitalg,-avx512vpopcntdq,-avx512fp16,-avx512bf16
diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 3cf696e..e00dbcd 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -34,5 +34,5 @@ jobs:
           bazel info
       - name: CPU Info
         run: |
-          lscpu
+          lscpu || true
       - run: bazel test --config=ci //...