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Error or symptom

• a pipeline ending in grep -q exits with status 141 under set -o pipefail
• a shell assertion fails even though the text it searches for is present
• any

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1. grep -q exits 141 under set -o pipefail, even when it matches

   Under set -o pipefail, piping a large payload into grep -q can fail the whole pipeline even though grep found what it was looking for. Swapping the pipe for a here string fixes it.

   ▮▮▯ one layer down / checked 28 Sep 2026 / Bash · GNU grep / bash · grep · pipefail · shell · testing