Thanks for including a full dmesg. That looks helpful. One thing is that numpy was recently updated in ports/packages. Can you share which version you are using? If it is the older version or the newer version?
On gdb, I suggest using gdb from ports rather than base gdb which isn't terribly useful. For the segfault, my suspicion is that numpy is compiled with fairly aggressive optimizations. A good quick google search leads me to believe that your Core 2 Duo E8400 only goes up to SSE 4.1, so to fix I think we need an older baseline when numpy is being compiled. Maybe it is using SSE4.2 or AVX features which are trippping up your box. That's my guess about the issue. On Fri, 16 Jan 2026, Stuart Cassoff wrote: > Numpy segfaults on amd64. > Also: gdb reporting errors with libs? > Let me know if more info is needed. > > > Stu > > > > >>> import numpy > Illegal instruction (core dumped) > > > > $ gdb python3 python3.13.core > > > GNU gdb 6.3 > Copyright 2004 Free Software Foundation, Inc. > GDB is free software, covered by the GNU General Public License, and you are > welcome to change it and/or distribute copies of it under certain conditions. > Type "show copying" to see the conditions. > There is absolutely no warranty for GDB. Type "show warranty" for details. > This GDB was configured as "amd64-unknown-openbsd7.8"...(no debugging symbols > found) > > Core was generated by `python3.13'. > Program terminated with signal 4, Illegal instruction. > Reading symbols from /usr/lib/libpthread.so.28.1...done. > Loaded symbols for /usr/lib/libpthread.so.28.1 > Loaded symbols for /usr/local/bin/python3 > Reading symbols from /usr/local/lib/libpython3.13.so.0.0...done. > Loaded symbols for /usr/local/lib/libpython3.13.so.0.0 > Reading symbols from /usr/local/lib/libintl.so.8.1...done. > Loaded symbols for /usr/local/lib/libintl.so.8.1 > Symbols already loaded for /usr/lib/libpthread.so.28.1 > Reading symbols from /usr/lib/libutil.so.21.0...done. > Loaded symbols for /usr/lib/libutil.so.21.0 > Reading symbols from /usr/lib/libm.so.10.1...done. > Loaded symbols for /usr/lib/libm.so.10.1 > Reading symbols from /usr/lib/libc.so.102.2...done. > Loaded symbols for /usr/lib/libc.so.102.2 > Reading symbols from /usr/local/lib/libiconv.so.7.1...done. > Loaded symbols for /usr/local/lib/libiconv.so.7.1 > Reading symbols from /usr/libexec/ld.so...Error while reading shared library > symbols: > Dwarf Error: wrong version in compilation unit header (is 4, should be 2) [in > module /usr/libexec/ld.so] > Reading symbols from > /usr/local/lib/python3.13/lib-dynload/readline.cpython-313.so...done. > Loaded symbols for > /usr/local/lib/python3.13/lib-dynload/readline.cpython-313.so > Reading symbols from /usr/lib/libreadline.so.6.0...done. > Loaded symbols for /usr/lib/libreadline.so.6.0 > Reading symbols from /usr/lib/libcurses.so.16.0...done. > Loaded symbols for /usr/lib/libcurses.so.16.0 > Reading symbols from > /usr/local/lib/python3.13/lib-dynload/_opcode.cpython-313.so...done. > Loaded symbols for > /usr/local/lib/python3.13/lib-dynload/_opcode.cpython-313.so > Reading symbols from > /usr/local/lib/python3.13/lib-dynload/unicodedata.cpython-313.so...done. > Loaded symbols for > /usr/local/lib/python3.13/lib-dynload/unicodedata.cpython-313.so > Reading symbols from > /usr/local/lib/python3.13/lib-dynload/select.cpython-313.so...done. > Loaded symbols for /usr/local/lib/python3.13/lib-dynload/select.cpython-313.so > Reading symbols from > /usr/local/lib/python3.13/lib-dynload/_struct.cpython-313.so...done. > Loaded symbols for > /usr/local/lib/python3.13/lib-dynload/_struct.cpython-313.so > Reading symbols from > /usr/local/lib/python3.13/lib-dynload/termios.cpython-313.so...done. > Loaded symbols for > /usr/local/lib/python3.13/lib-dynload/termios.cpython-313.so > Reading symbols from > /usr/local/lib/python3.13/lib-dynload/fcntl.cpython-313.so...done. > Loaded symbols for /usr/local/lib/python3.13/lib-dynload/fcntl.cpython-313.so > Reading symbols from > /usr/local/lib/python3.13/lib-dynload/_curses.cpython-313.so...done. > Loaded symbols for > /usr/local/lib/python3.13/lib-dynload/_curses.cpython-313.so > Reading symbols from > /usr/local/lib/python3.13/site-packages/numpy/_core/_multiarray_umath.cpython-313.so...done. > Loaded symbols for > /usr/local/lib/python3.13/site-packages/numpy/_core/_multiarray_umath.cpython-313.so > Reading symbols from /usr/local/lib/libcblas.so.2.1...done. > Loaded symbols for /usr/local/lib/libcblas.so.2.1 > Reading symbols from /usr/lib/libc++.so.12.0...done. > Loaded symbols for /usr/lib/libc++.so.12.0 > Reading symbols from /usr/lib/libc++abi.so.9.0...done. > Loaded symbols for /usr/lib/libc++abi.so.9.0 > Reading symbols from /usr/local/lib/libblas.so.2.2...done. > Loaded symbols for /usr/local/lib/libblas.so.2.2 > Reading symbols from /usr/local/lib/libgfortran.so.10.0...Error while reading > shared library symbols: > Dwarf Error: wrong version in compilation unit header (is 5, should be 2) [in > module /usr/local/lib/libgfortran.so.10.0] > Reading symbols from /usr/local/lib/libquadmath.so.5.0...Error while reading > shared library symbols: > Dwarf Error: wrong version in compilation unit header (is 5, should be 2) [in > module /usr/local/lib/libquadmath.so.5.0] > #0 0x000004959090e241 in > _ZNSt3__112__hash_tableINS_17__hash_value_typeIiNS_8functionIFP7_objectP16tagPyArrayObjecthEEEEENS_22__unordered_map_hasherIiS9_NS_4hashIiEENS_8equal_toIiEELb1EEENS_21__unordered_map_equalIiS9_SE_SC_Lb1EEENS_9allocatorIS9_EEE25__emplace_unique_key_argsIiJRKNS_4pairIKiS8_EEEEENSM_INS_15__hash_iteratorIPNS_11__hash_nodeIS9_PvEEEEbEERKT_DpOT0_ > () > from > /usr/local/lib/python3.13/site-packages/numpy/_core/_multiarray_umath.cpython-313.so > (gdb) bt > #0 0x000004959090e241 in > _ZNSt3__112__hash_tableINS_17__hash_value_typeIiNS_8functionIFP7_objectP16tagPyArrayObjecthEEEEENS_22__unordered_map_hasherIiS9_NS_4hashIiEENS_8equal_toIiEELb1EEENS_21__unordered_map_equalIiS9_SE_SC_Lb1EEENS_9allocatorIS9_EEE25__emplace_unique_key_argsIiJRKNS_4pairIKiS8_EEEEENSM_INS_15__hash_iteratorIPNS_11__hash_nodeIS9_PvEEEEbEERKT_DpOT0_ > () > from > /usr/local/lib/python3.13/site-packages/numpy/_core/_multiarray_umath.cpython-313.so > #1 0x000004959090cfc0 in _GLOBAL__sub_I_unique.cpp () from > /usr/local/lib/python3.13/site-packages/numpy/_core/_multiarray_umath.cpython-313.so > #2 0x000004957b2c8e43 in ?? () from /usr/libexec/ld.so > #3 0x0000000000000001 in ?? () > #4 0x000000007fff2000 in ?? () > #5 0x00000494d478cf00 in _thread_key_zero (key=Variable "key" is not > available. > ) at /usr/src/lib/librthread/rthread.c:194 > #6 0x0000000000000000 in ?? () > > > > > OpenBSD 7.8-current (GENERIC.MP) #208: Thu Jan 15 14:49:40 MST 2026 > [email protected]:/usr/src/sys/arch/amd64/compile/GENERIC.MP > real mem = 4277600256 (4079MB) > avail mem = 4121165824 (3930MB) > random: good seed from bootblocks > mpath0 at root > scsibus0 at mpath0: 256 targets > mainbus0 at root > bios0 at mainbus0: SMBIOS rev. 2.5 @ 0xfc8c0 (36 entries) > bios0: vendor Dell Inc. version "A02" date 03/30/2009 > bios0: Dell Inc. Inspiron 537 > acpi0 at bios0: ACPI 1.0 > acpi0: sleep states S0 S3 S4 S5 > acpi0: tables DSDT FACP APIC MCFG SLIC OEMB HPET GSCI SSDT > acpi0: wakeup devices P0P2(S4) P0P3(S4) P0P1(S4) MC97(S4) P0P4(S4) P0P5(S4) > P0P6(S4) P0P7(S4) P0P8(S4) P0P9(S4) USB0(S3) USB1(S3) USB2(S3) USB3(S3) > EUSB(S3) PWRB(S4) > acpitimer0 at acpi0: 3579545 Hz, 24 bits > acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat > cpu0 at mainbus0: apid 0 (boot processor) > cpu0: Intel(R) Core(TM)2 Duo CPU E8400 @ 3.00GHz, 2992.62 MHz, 06-17-0a, > patch 00000a0b > cpu0: cpuid 1 > edx=bfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE> > > ecx=408e3fd<SSE3,DTES64,MWAIT,DS-CPL,VMX,SMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,SSE4.1,XSAVE> > cpu0: cpuid 6 eax=1<SENSOR> ecx=3<EFFFREQ> > cpu0: cpuid a vers=2, gp=2, gpwidth=40, ff=3, ffwidth=40 > cpu0: cpuid 80000001 edx=20100800<NXE,LONG> ecx=1<LAHF> > cpu0: MELTDOWN > cpu0: 32KB 64b/line 8-way D-cache, 32KB 64b/line 8-way I-cache, 6MB 64b/line > 24-way L2 cache > cpu0: smt 0, core 0, package 0 > mtrr: Pentium Pro MTRR support, 8 var ranges, 88 fixed ranges > cpu0: apic clock running at 332MHz > cpu0: mwait min=64, max=64, C-substates=0.2.2.2.2, IBE > cpu1 at mainbus0: apid 1 (application processor) > cpu1: Intel(R) Core(TM)2 Duo CPU E8400 @ 3.00GHz, 2992.67 MHz, 06-17-0a, > patch 00000a0b > cpu1: smt 0, core 1, package 0 > ioapic0 at mainbus0: apid 2 pa 0xfec00000, version 20, 24 pins > acpimcfg0 at acpi0 > acpimcfg0: addr 0xe0000000, bus 0-255 > acpihpet0 at acpi0: 14318179 Hz > acpiprt0 at acpi0: bus 0 (PCI0) > acpiprt1 at acpi0: bus 4 (P0P1) > acpiprt2 at acpi0: bus 2 (P0P4) > acpiprt3 at acpi0: bus 3 (P0P5) > acpiprt4 at acpi0: bus -1 (P0P6) > acpiprt5 at acpi0: bus -1 (P0P7) > acpiprt6 at acpi0: bus -1 (P0P8) > acpiprt7 at acpi0: bus -1 (P0P9) > acpipci0 at acpi0 PCI0 > acpicmos0 at acpi0 > acpibtn0 at acpi0: PWRB(wakeup) > acpicpu0 at acpi0: C1(@1 halt!), PSS > acpicpu1 at acpi0: C1(@1 halt!), PSS > acpitz0 at acpi0 > acpitz0: critical temperature is 110 degC > cpu0: Enhanced SpeedStep 2992 MHz: speeds: 3003, 2670, 2336, 2003 MHz > pci0 at mainbus0 bus 0 > pchb0 at pci0 dev 0 function 0 "Intel G41 Host" rev 0x03 > ppb0 at pci0 dev 1 function 0 "Intel G45 PCIE" rev 0x03: apic 2 int 16 > pci1 at ppb0 bus 1 > radeondrm0 at pci1 dev 0 function 0 "ATI Radeon HD 4350" rev 0x00 > drm0 at radeondrm0 > radeondrm0: apic 2 int 16 > azalia0 at pci1 dev 0 function 1 "ATI Radeon HD 4000 HD Audio" rev 0x00: apic > 2 int 17 > azalia0: no supported codecs > azalia1 at pci0 dev 27 function 0 "Intel 82801GB HD Audio" rev 0x01: apic 2 > int 16 > azalia1: codecs: Realtek ALC662 > audio0 at azalia1 > ppb1 at pci0 dev 28 function 0 "Intel 82801GB PCIE" rev 0x01: apic 2 int 16 > pci2 at ppb1 bus 2 > ppb2 at pci0 dev 28 function 1 "Intel 82801GB PCIE" rev 0x01: apic 2 int 17 > pci3 at ppb2 bus 3 > re0 at pci3 dev 0 function 0 "Realtek 8101E" rev 0x02: RTL8102E (0x3480), > apic 2 int 17, address 00:25:64:03:5d:33 > rlphy0 at re0 phy 7: RTL8201L, rev. 1 > uhci0 at pci0 dev 29 function 0 "Intel 82801GB USB" rev 0x01: apic 2 int 23 > uhci1 at pci0 dev 29 function 1 "Intel 82801GB USB" rev 0x01: apic 2 int 19 > uhci2 at pci0 dev 29 function 2 "Intel 82801GB USB" rev 0x01: apic 2 int 18 > uhci3 at pci0 dev 29 function 3 "Intel 82801GB USB" rev 0x01: apic 2 int 16 > ehci0 at pci0 dev 29 function 7 "Intel 82801GB USB" rev 0x01: apic 2 int 23 > usb0 at ehci0: USB revision 2.0 > uhub0 at usb0 configuration 1 interface 0 "Intel EHCI root hub" rev 2.00/1.00 > addr 1 > ppb3 at pci0 dev 30 function 0 "Intel 82801BA Hub-to-PCI" rev 0xe1 > pci4 at ppb3 bus 4 > pcib0 at pci0 dev 31 function 0 "Intel 82801GB LPC" rev 0x01 > pciide0 at pci0 dev 31 function 2 "Intel 82801GB SATA" rev 0x01: DMA, channel > 0 configured to native-PCI, channel 1 configured to native-PCI > pciide0: using apic 2 int 19 for native-PCI interrupt > wd0 at pciide0 channel 0 drive 0: <WDC WD6400AAKS-75A7B2> > wd0: 16-sector PIO, LBA48, 610480MB, 1250263728 sectors > wd1 at pciide0 channel 0 drive 1: <WDC WD10EALX-229BA0> > wd1: 16-sector PIO, LBA48, 953869MB, 1953525168 sectors > wd0(pciide0:0:0): using PIO mode 4, Ultra-DMA mode 6 > wd1(pciide0:0:1): using PIO mode 4, Ultra-DMA mode 6 > ichiic0 at pci0 dev 31 function 3 "Intel 82801GB SMBus" rev 0x01: apic 2 int > 19 > iic0 at ichiic0 > spdmem0 at iic0 addr 0x50: 2GB DDR2 SDRAM non-parity PC2-6400CL6 > spdmem1 at iic0 addr 0x52: 2GB DDR2 SDRAM non-parity PC2-6400CL6 > usb1 at uhci0: USB revision 1.0 > uhub1 at usb1 configuration 1 interface 0 "Intel UHCI root hub" rev 1.00/1.00 > addr 1 > usb2 at uhci1: USB revision 1.0 > uhub2 at usb2 configuration 1 interface 0 "Intel UHCI root hub" rev 1.00/1.00 > addr 1 > usb3 at uhci2: USB revision 1.0 > uhub3 at usb3 configuration 1 interface 0 "Intel UHCI root hub" rev 1.00/1.00 > addr 1 > usb4 at uhci3: USB revision 1.0 > uhub4 at usb4 configuration 1 interface 0 "Intel UHCI root hub" rev 1.00/1.00 > addr 1 > isa0 at pcib0 > isadma0 at isa0 > pckbc0 at isa0 port 0x60/5 irq 1 irq 12 > pckbd0 at pckbc0 (kbd slot) > wskbd0 at pckbd0: console keyboard > pcppi0 at isa0 port 0x61 > spkr0 at pcppi0 > it0 at isa0 port 0x2e/2: IT8718F rev 7, EC port 0xa10 > uhidev0 at uhub1 port 1 configuration 1 interface 0 "Microsoft Microsoft > Optical Mouse with Tilt Wheel" rev 2.00/1.20 addr 2 > uhidev0: iclass 3/1, 24 report ids > ums0 at uhidev0 reportid 17: 3 buttons, Z and W dir > wsmouse0 at ums0 mux 0 > uhid0 at uhidev0 reportid 18: input=0, output=0, feature=1 > ucc0 at uhidev0 reportid 19: 1 usage, 0 keys, enum > uhid1 at uhidev0 reportid 23: input=0, output=0, feature=1 > uhid2 at uhidev0 reportid 24: input=0, output=0, feature=1 > uhidev1 at uhub2 port 2 configuration 1 interface 0 "Microsoft Comfort Curve > Keyboard 2000" rev 2.00/1.73 addr 2 > uhidev1: iclass 3/1 > ukbd0 at uhidev1: 8 variable keys, 6 key codes > wskbd1 at ukbd0 mux 1 > uhidev2 at uhub2 port 2 configuration 1 interface 1 "Microsoft Comfort Curve > Keyboard 2000" rev 2.00/1.73 addr 2 > uhidev2: iclass 3/0, 1 report id > ucc1 at uhidev2 reportid 1: 1024 usages, 20 keys, array > wskbd2 at ucc1 mux 1 > vscsi0 at root > scsibus1 at vscsi0: 256 targets > softraid0 at root > scsibus2 at softraid0: 256 targets > root on wd0a (1349c680e9761c4e.a) swap on wd0b dump on wd0b > radeondrm0: RV710 > radeon_audio_component_init: stub > radeondrm0: 1680x1050, 32bpp > wsdisplay0 at radeondrm0 mux 1: console (std, vt100 emulation), using wskbd0 > wskbd1: connecting to wsdisplay0 > wskbd2: connecting to wsdisplay0 > wsdisplay0: screen 1-5 added (std, vt100 emulation) > >
