fstat(4, {st_mode=S_IFIFO|0600, st_size=0, ...}) = 0
write(1, "flush\n", 6flush
)                  = 6
write(4, "1 2 3 ", 6)                   = 6
poll([{fd=3, events=POLLIN}], 1, 0)     = 1 ([{fd=3, revents=POLLIN}])
write(1, "in-ready? 3\n", 12in-ready? 3
)           = 12
fstat(3, {st_mode=S_IFIFO|0600, st_size=0, ...}) = 0
read(3, "1 2 3 ", 4096)                 = 6
write(1, "read 1 exp: 1\n", 14read 1 exp: 1
)         = 14
poll([{fd=3, events=POLLIN}], 1, 0)     = 0 (Timeout)
write(1, "in-ready? #f\n", 13in-ready? #f
)          = 13
write(2, "\nError", 6
Error)                  = 6
write(2, ": ", 2: )                       = 2
w