From bc063e3ccad3d5bfd9f0c86662b82bf730eaa465 Mon Sep 17 00:00:00 2001
From: Thomas Kosiewski <tk@coder.com>
Date: Sat, 10 Oct 2026 01:46:58 +0000
Subject: [PATCH] =?UTF-8?q?=F0=9F=A4=96=20ci:=20keep=20stderr=20out=20of?=
 =?UTF-8?q?=20the=20cold-start=20JSON=20artifact?=
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---
 .github/workflows/desktop-cold-start.yml | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/desktop-cold-start.yml b/.github/workflows/desktop-cold-start.yml
index 4973f471289..837a3892d0f 100644
--- a/.github/workflows/desktop-cold-start.yml
+++ b/.github/workflows/desktop-cold-start.yml
@@ -37,7 +37,10 @@ jobs:
           cd "$RUNNER_TEMP/base" && bun install --frozen-lockfile && make build
       - name: Run cold-start A/B
         env: { ELECTRON_DISABLE_SANDBOX: 1 }
-        run: xvfb-run -a node --import tsx scripts/perf/desktopColdStart.ts --base "$RUNNER_TEMP/base" --head "$GITHUB_WORKSPACE" --pairs "$PAIRS" --json > cold-start.json
+        # Redirect inside sh -c: Ubuntu 22.04's xvfb-run runs the command with 2>&1, which mixed progress lines into the JSON.
+        run: |
+          # shellcheck disable=SC2016 # the inner sh -c expands these
+          xvfb-run -a sh -c 'node --import tsx scripts/perf/desktopColdStart.ts --base "$RUNNER_TEMP/base" --head "$GITHUB_WORKSPACE" --pairs "$PAIRS" --json > cold-start.json'
       - uses: actions/upload-artifact@bbbca2ddaa5d8feaa63e36b76fdaad77386f024f # v7.0.0
         if: always()
         with: