Warning: IOBUF 'led_0__io' attribute 'IO_STANDARD' is not recognised (on line 5)
Warning: IOBUF 'led_1__io' attribute 'IO_STANDARD' is not recognised (on line 7)
Warning: IOBUF 'led_2__io' attribute 'IO_STANDARD' is not recognised (on line 9)
Warning: IOBUF 'led_3__io' attribute 'IO_STANDARD' is not recognised (on line 11)
Warning: IOBUF 'led_4__io' attribute 'IO_STANDARD' is not recognised (on line 13)
Warning: IOBUF 'led_5__io' attribute 'IO_STANDARD' is not recognised (on line 15)
Warning: IOBUF 'led_6__io' attribute 'IO_STANDARD' is not recognised (on line 17)
Warning: IOBUF 'led_7__io' attribute 'IO_STANDARD' is not recognised (on line 19)
Warning: Max frequency for clock '$glbnet$top.ecp5pll_shift_clk': 349.90 MHz (FAIL at 355.11 MHz)
terminate called after throwing an instance of 'nextpnr_ecp5::assertion_failure'
  what():  Assertion failure: dir == "OUTPUT" (/home/oguz286/Software/Lattice/nextpnr/ecp5/bitstream.cc:868)
build_top.sh: line 9: 136935 Aborted                 (core dumped) "$NEXTPNR_ECP5" --quiet --timing-allow-fail --log top.tim --85k --package CABGA381 --speed 8 --json top.json --lpf top.lpf --textcfg top.config