A: genuine timeout (never completes, 10000 polls): error=0x0  BUG: ETIMEOUT NEVER reported -> alpm_*x*() returns success and copies stale SMBHDATA/SMBHBLOCK to the caller
B: completes on final poll #10000: error=0x20  BUG: spurious ETIMEOUT on a transfer that completed on the last poll
C-fix: genuine timeout: error=0x20  ETIMEOUT reported (correct)
D-fix: completes on final poll: error=0x0  success, no spurious error (correct)
BUILD-RC=0