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The packet_read_line() function will die if it sees any protocol or socket errors. But it will return NULL for a flush packet; some callers which are not expecting this may dereference NULL if they get an unexpected flush. This would involve the other side breaking protocol, but we should flag the error rather than segfault. Signed-off-by: Jon Simons <jon@jonsimons.org> Reviewed-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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