error on kernel 4.18.5 looked a little bit different.
[11735.012648] nouveau 0000:01:00.0: gr: TRAP ch 5 [00ff35f000 Xorg[2601]]
[11735.012660] nouveau 0000:01:00.0: gr: GPC0/TPC0/MP trap: global 00000004
[MULTIPLE_WARP_ERRORS] warp 000e [OOR_ADDR]
[11735.012666] nouveau 0000:01:00.0: gr: GPC0/TPC1/MP trap: global 00000004
[MULTIPLE_WARP_ERRORS] warp 3000e [OOR_ADDR]
[11735.012672] nouveau 0000:01:00.0: gr: GPC0/TPC2/MP trap: global 00000000 []
warp 000e [OOR_ADDR]
[11735.012678] nouveau 0000:01:00.0: gr: GPC0/TPC3/MP trap: global 00000000 []
warp 000e [OOR_ADDR]
[11735.012701] nouveau 0000:01:00.0: gr: TRAP ch 5 [00ff35f000 Xorg[2601]]
[11735.012709] nouveau 0000:01:00.0: gr: GPC0/TPC0/MP trap: global 00000004
[MULTIPLE_WARP_ERRORS] warp 9000e [OOR_ADDR]
[11735.012715] nouveau 0000:01:00.0: gr: GPC0/TPC1/MP trap: global 00000004
[MULTIPLE_WARP_ERRORS] warp 2000e [OOR_ADDR]
[11735.012720] nouveau 0000:01:00.0: gr: GPC0/TPC2/MP trap: global 00000004
[MULTIPLE_WARP_ERRORS] warp 6000e [OOR_ADDR]
[11735.012726] nouveau 0000:01:00.0: gr: GPC0/TPC3/MP trap: global 00000004
[MULTIPLE_WARP_ERRORS] warp 4000e [OOR_ADDR]
[11735.013192] nouveau 0000:01:00.0: gr: TRAP ch 4 [00ff8a7000
systemd-logind[1203]]
[11735.013201] nouveau 0000:01:00.0: gr: GPC0/TPC0/MP trap: global 00000000 []
warp 30009 [ILLEGAL_INSTR_ENCODING]
[11735.013208] nouveau 0000:01:00.0: gr: GPC0/TPC1/MP trap: global 00000000 []
warp 10009 [ILLEGAL_INSTR_ENCODING]
[11735.013214] nouveau 0000:01:00.0: gr: GPC0/TPC2/MP trap: global 00000004
[MULTIPLE_WARP_ERRORS] warp 0009 [ILLEGAL_INSTR_ENCODING]
[11735.013219] nouveau 0000:01:00.0: gr: GPC0/TPC3/MP trap: global 00000000 []
warp 10009 [ILLEGAL_INSTR_ENCODING]