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Samuel Cui
a420324adb
Both were invisible on Darwin: one needs a real Linux ENOSPC, the other needs the command's own stderr. - A non-linear target pre-allocates with fallocate, and a failure there was reported as a bare error: it never ran through mappingError, never aborted the device and never ended a linear target, unlike every neighbouring path. A volume that fills up after the disk-usage snapshot therefore reported a target that was "not written" instead of ErrTargetNoSpace. Classify it like the rest. TestFullVolumePreallocationReportsNoSpace pins it with a real ENOSPC on a small tmpfs (it fails on the previous revision), and TestNonLinearTargetOnRefusingDeviceReportsATargetFailure records that a device refusing fallocate reports its own refusal rather than claiming no space. The drain test now uses a linear target, which is the shape that actually queues buffers before the write fails. - cmd/acp registered the progress bar and then the report collector, and a run keeps one event handler, so the bar received nothing: the command printed its construction frame and no update. Compose the two handlers in the command and pin it end to end (the new test fails on the previous revision). README now says a command that wants both composes them. - item.go still promised that an empty Targets slice hashes the source; the default HashOff reads nothing. TESTING.md and TODO.md now describe the Linux suite that actually exists.