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`terminate()` signals the parent only. Chrome's zygote, renderer and gpu
children outlive it by a moment and go on writing into the profile, so rmtree
walked a directory that gained a file between its readdir and its rmdir and
raised "Directory not empty". The probe exited non-zero, and every test in the
file errored at setup — intermittently, roughly one run in three, for a reason
nowhere near the chat code they were testing.
TemporaryDirectory(ignore_cleanup_errors=True) in all four probes that own a
profile: a few bytes left in a throwaway directory are harmless, failing the run
is not. `proc.wait()` after `kill()` was also missing — a killed process still
has to be reaped.
layout_probe.py never cleaned up at all (mkdtemp, no removal) and never waited
for Chrome; it leaked a profile into /tmp on every run.
Ten consecutive runs of test_chat_send.py are clean.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01HCGdheDLxGReuKHga3BtST
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Reported: on mobile you see only the right-hand edge of the panel, without the
content. Measured, before anything was changed:
320 px viewport -> panel at -138..192, 138 px off the left
360 px -> -98..232
412 px -> -46..284
The panel is 330 px wide and anchored to the right edge of its button — but
that button is not at the right edge of the screen, since the bell and the user
menu come after it. What falls off is the left-hand side, which is where the
file names are, so what stayed on screen was a strip of progress bars belonging
to nothing.
Narrowing it would not have helped: the overflow comes from where the right
edge is pinned, not from the width. Below the existing 768 px breakpoint the
panel is anchored to the viewport instead, full width on a phone and capped at
420 px on a tablet, where stretching two filenames across 750 px would be
silly. Desktop keeps its 330 px against the button.
The interesting part is how it was found. The responsive tests read numbers out
of the stylesheet and said, in their own docstring, that a layout could not be
measured because the suite had no browser. It has one now — Chrome, from the
video work — so layout_probe.py renders the real stylesheet at a given width and
returns rectangles. `width: 330px` was never the thing worth asserting on.
An iframe carries the viewport, because a headless window will not go below
about 500 px, and one browser measures every width: launching one per test put
three minutes on the suite against twenty-six seconds for all of them. Checked
that the new tests fail with the rule removed — three of them do — and that
they pass with it back.
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