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Martin Vogel
65d60e72f5
Found while proving the previous commit, in the same step, and the worse
of the two defects because it fails OPEN. The classification was
if printf '%s\n' "$FILES" | grep -qE '^(src/|internal/|...)'; then
under the runner's `bash -eo pipefail`. grep -q exits on its first match;
once the list is larger than the pipe buffer printf is still writing,
dies of SIGPIPE, and pipefail turns the MATCH into a failed pipeline. The
else branch then writes product=false, and pr-smoke and memwaste are
skipped -- on exactly the PRs that change the most files. The previous
commit's message flagged this as a follow-up; it is fixed here instead.
The list now reaches grep through a here-string, so there is no pipe to
break. The regex is unchanged.
Proof, by executing the workflow's own run block under
`bash -eo pipefail` with a stub gh, ten runs each:
849 KB list, first line src/a.c before: product=false 10/10
after: product=true 10/10
849 KB list, docs only product=false before and after
small docs-only list product=false
422 fallback on the real #2246 product=true
fallback, nonexistent merge ref rc 128, no output written
It takes roughly 1,500 changed files to cross the buffer, which is why
ordinary PRs never showed it.
Signed-off-by: Martin Vogel <martin.vogel.tech@gmail.com>