On Tue, Sep 11, 2012 at 12:12:34PM -0400, Glen Barber wrote: G> Hi, G> G> I upgraded to head/ r239865 (Last Changed Date: 2012-09-11 09:29:50). G> G> My laptop now panics with on boot with the new kernel. G> G> Backtrace (and hopefully some useful) information is attached. I can G> provide any additional information necessary. I'd blame this one: http://lists.freebsd.org/pipermail/svn-src-head/2012-September/040236.html G> Regards, G> G> Glen G> G> Script started on Tue Sep 11 12:03:54 2012 G> root_at_nucleus:/usr/obj/usr/src/sys/NUCLEUS # kgdb kernel.debug /var/crash/vmcore.3 G> GNU gdb 6.1.1 [FreeBSD] G> Copyright 2004 Free Software Foundation, Inc. G> GDB is free software, covered by the GNU General Public License, and you are G> welcome to change it and/or distribute copies of it under certain conditions. G> Type "show copying" to see the conditions. G> There is absolutely no warranty for GDB. Type "show warranty" for details. G> This GDB was configured as "amd64-marcel-freebsd"... G> G> Unread portion of the kernel message buffer: G> Copyright (c) 1992-2012 The FreeBSD Project. G> Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994 G> The Regents of the University of California. All rights reserved. G> FreeBSD is a registered trademark of The FreeBSD Foundation. G> FreeBSD 10.0-CURRENT #29 r240362: Tue Sep 11 11:12:10 EDT 2012 G> root_at_nucleus:/usr/obj/usr/src/sys/NUCLEUS amd64 G> WARNING: WITNESS option enabled, expect reduced performance. G> CPU: Intel(R) Core(TM) i3 CPU M 370 _at_ 2.40GHz (2394.06-MHz K8-class CPU) G> Origin = "GenuineIntel" Id = 0x20655 Family = 6 Model = 25 Stepping = 5 G> Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE> G> Features2=0x9ae3bd<SSE3,DTES64,MON,DS_CPL,VMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,POPCNT> G> AMD Features=0x28100800<SYSCALL,NX,RDTSCP,LM> G> AMD Features2=0x1<LAHF> G> TSC: P-state invariant, performance statistics G> real memory = 8589934592 (8192 MB) G> avail memory = 7867260928 (7502 MB) G> Event timer "LAPIC" quality 600 G> ACPI APIC Table: <ACRSYS ACRPRDCT> G> FreeBSD/SMP: Multiprocessor System Detected: 4 CPUs G> FreeBSD/SMP: 1 package(s) x 2 core(s) x 2 SMT threads G> cpu0 (BSP): APIC ID: 0 G> cpu1 (AP): APIC ID: 1 G> cpu2 (AP): APIC ID: 4 G> cpu3 (AP): APIC ID: 5 G> ioapic0: Changing APIC ID to 2 G> ioapic0 <Version 2.0> irqs 0-23 on motherboard G> kbd1 at kbdmux0 G> ctl: CAM Target Layer loaded G> cryptosoft0: <software crypto> on motherboard G> acpi0: <ACRSYS ACRPRDCT> on motherboard G> acpi0: Power Button (fixed) G> cpu0: <ACPI CPU> on acpi0 G> cpu1: <ACPI CPU> on acpi0 G> cpu2: <ACPI CPU> on acpi0 G> cpu3: <ACPI CPU> on acpi0 G> hpet0: <High Precision Event Timer> iomem 0xfed00000-0xfed003ff on acpi0 G> Timecounter "HPET" frequency 14318180 Hz quality 950 G> Event timer "HPET" frequency 14318180 Hz quality 550 G> Event timer "HPET1" frequency 14318180 Hz quality 440 G> Event timer "HPET2" frequency 14318180 Hz quality 440 G> Event timer "HPET3" frequency 14318180 Hz quality 440 G> Event timer "HPET4" frequency 14318180 Hz quality 440 G> atrtc0: <AT realtime clock> port 0x70-0x77 irq 8 on acpi0 G> atrtc0: Warning: Couldn't map I/O. G> Event timer "RTC" frequency 32768 Hz quality 0 G> attimer0: <AT timer> port 0x40-0x43,0x50-0x53 irq 0 on acpi0 G> Timecounter "i8254" frequency 1193182 Hz quality 0 G> Event timer "i8254" frequency 1193182 Hz quality 100 G> Timecounter "ACPI-fast" frequency 3579545 Hz quality 900 G> acpi_timer0: <24-bit timer at 3.579545MHz> port 0x408-0x40b on acpi0 G> acpi_ec0: <Embedded Controller: GPE 0x17> port 0x62,0x66 on acpi0 G> pcib0: <ACPI Host-PCI bridge> port 0xcf8-0xcff on acpi0 G> pci0: <ACPI PCI bus> on pcib0 G> vgapci0: <VGA-compatible display> port 0x3050-0x3057 mem 0xb0000000-0xb03fffff,0xa0000000-0xafffffff irq 16 at device 2.0 on pci0 G> pci0: <simple comms> at device 22.0 (no driver attached) G> ehci0: <Intel PCH USB 2.0 controller USB-B> mem 0xb4405c00-0xb4405fff irq 16 at device 26.0 on pci0 G> usbus0: EHCI version 1.0 G> usbus0 on ehci0 G> hdac0: <Intel 5 Series/3400 Series HDA Controller> mem 0xb4400000-0xb4403fff irq 22 at device 27.0 on pci0 G> pcib1: <ACPI PCI-PCI bridge> at device 28.0 on pci0 G> pci1: <ACPI PCI bus> on pcib1 G> bge0: <Broadcom BCM57780 A1, ASIC rev. 0x57780001> mem 0xb3400000-0xb340ffff irq 16 at device 0.0 on pci1 G> bge0: CHIP ID 0x57780001; ASIC REV 0x57780; CHIP REV 0x577800; PCI-E G> miibus0: <MII bus> on bge0 G> brgphy0: <BCM57780 1000BASE-T media interface> PHY 1 on miibus0 G> brgphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseT, 1000baseT-master, 1000baseT-FDX, 1000baseT-FDX-master, auto, auto-flow G> bge0: Ethernet address: b8:70:f4:8a:b8:15 G> pcib2: <ACPI PCI-PCI bridge> at device 28.1 on pci0 G> pcib2: failed to allocate initial I/O port window: 0x1000-0x1fff G> pci2: <ACPI PCI bus> on pcib2 G> ath0: <Atheros 9287> mem 0xb2400000-0xb240ffff irq 17 at device 0.0 on pci2 G> ath0: [HT] enabling HT modes G> ath0: [HT] enabling short-GI in 20MHz mode G> ath0: [HT] 2 RX streams; 2 TX streams G> ath0: AR9287 mac 384.2 RF5133 phy 15.15 G> ath0: 2GHz radio: 0x0000; 5GHz radio: 0x00c0 G> ehci1: <Intel PCH USB 2.0 controller USB-A> mem 0xb4405800-0xb4405bff irq 23 at device 29.0 on pci0 G> usbus1: EHCI version 1.0 G> usbus1 on ehci1 G> pcib3: <ACPI PCI-PCI bridge> at device 30.0 on pci0 G> pci3: <ACPI PCI bus> on pcib3 G> isab0: <PCI-ISA bridge> at device 31.0 on pci0 G> isa0: <ISA bus> on isab0 G> ahci0: <Intel 5 Series/3400 Series AHCI SATA controller> port 0x3048-0x304f,0x305c-0x305f,0x3040-0x3047,0x3058-0x305b,0x3020-0x303f mem 0xb4405000-0xb44057ff irq 19 at device 31.2 on pci0 G> ahci0: AHCI v1.30 with 4 3Gbps ports, Port Multiplier not supported G> ahcich0: <AHCI channel> at channel 0 on ahci0 G> ahcich1: <AHCI channel> at channel 1 on ahci0 G> ahciem0: <AHCI enclosure management bridge> on ahci0 G> pci0: <serial bus, SMBus> at device 31.3 (no driver attached) G> pci0: <dasp> at device 31.6 (no driver attached) G> pcib4: <ACPI Host-PCI bridge> on acpi0 G> pci255: <ACPI PCI bus> on pcib4 G> battery0: <ACPI Control Method Battery> on acpi0 G> acpi_acad0: <AC Adapter> on acpi0 G> acpi_button0: <Power Button> on acpi0 G> acpi_lid0: <Control Method Lid Switch> on acpi0 G> acpi_button1: <Sleep Button> on acpi0 G> atkbdc0: <Keyboard controller (i8042)> port 0x60,0x64 irq 1 on acpi0 G> atkbd0: <AT Keyboard> irq 1 on atkbdc0 G> kbd0 at atkbd0 G> atkbd0: [GIANT-LOCKED] G> psm0: <PS/2 Mouse> irq 12 on atkbdc0 G> psm0: [GIANT-LOCKED] G> psm0: model IntelliMouse, device ID 3 G> sc0: <System console> at flags 0x100 on isa0 G> sc0: VGA <16 virtual consoles, flags=0x300> G> vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0 G> ppc0: cannot reserve I/O port range G> coretemp0: <CPU On-Die Thermal Sensors> on cpu0 G> est0: <Enhanced SpeedStep Frequency Control> on cpu0 G> p4tcc0: <CPU Frequency Thermal Control> on cpu0 G> coretemp1: <CPU On-Die Thermal Sensors> on cpu1 G> est1: <Enhanced SpeedStep Frequency Control> on cpu1 G> p4tcc1: <CPU Frequency Thermal Control> on cpu1 G> coretemp2: <CPU On-Die Thermal Sensors> on cpu2 G> est2: <Enhanced SpeedStep Frequency Control> on cpu2 G> p4tcc2: <CPU Frequency Thermal Control> on cpu2 G> coretemp3: <CPU On-Die Thermal Sensors> on cpu3 G> est3: <Enhanced SpeedStep Frequency Control> on cpu3 G> p4tcc3: <CPU Frequency Thermal Control> on cpu3 G> ZFS filesystem version: 5 G> ZFS storage pool version: features support (5000) G> Timecounters tick every 1.000 msec G> IPsec: Initialized Security Association Processing. G> hdacc0: <Realtek ALC272 HDA CODEC> at cad 0 on hdac0 G> hdaa0: <Realtek ALC272 Audio Function Group> at nid 1 on hdacc0 G> pcm0: <Realtek ALC272 (Analog 2.0+HP/2.0)> at nid 20,33 and 25 on hdaa0 G> pcm1: <Realtek ALC272 (Left Analog Mic)> at nid 24 on hdaa0 G> hdacc1: <Intel Ibex Peak HDA CODEC> at cad 3 on hdac0 G> hdaa1: <Intel Ibex Peak Audio Function Group> at nid 1 on hdacc1 G> pcm2: <Intel Ibex Peak (HDMI/DP 8ch)> at nid 4 on hdaa1 G> usbus0: 480Mbps High Speed USB v2.0 G> usbus1: 480Mbps High Speed USB v2.0 G> ugen0.1: <Intel> at usbus0 G> uhub0: <Intel EHCI root HUB, class 9/0, rev 2.00/1.00, addr 1> on usbus0 G> ugen1.1: <Intel> at usbus1 G> uhub1: <Intel EHCI root HUB, class 9/0, rev 2.00/1.00, addr 1> on usbus1 G> uhub0: 2 ports with 2 removable, self powered G> uhub1: 2 ports with 2 removable, self powered G> ugen0.2: <vendor 0x8087> at usbus0 G> uhub2: <vendor 0x8087 product 0x0020, class 9/0, rev 2.00/0.00, addr 2> on usbus0 G> ugen1.2: <vendor 0x8087> at usbus1 G> uhub3: <vendor 0x8087 product 0x0020, class 9/0, rev 2.00/0.00, addr 2> on usbus1 G> uhub2: 6 ports with 6 removable, self powered G> uhub3: 8 ports with 8 removable, self powered G> ugen0.3: <APB5503FB> at usbus0 G> ugen1.3: <PixArt> at usbus1 G> ada0 at ahcich0 bus 0 scbus0 target 0 lun 0 G> ada0: <INTEL SSDSC2CW180A3 400i> ATA-9 SATA 2.x device G> ada0: 300.000MB/s transfers (SATA 2.x, UDMA6, PIO 8192bytes) G> ada0: Command Queueing enabled G> ada0: 171705MB (351651888 512 byte sectors: 16H 63S/T 16383C) G> ada0: Previously was known as ad4 G> ses0 at ahciem0 bus 0 scbus2 target 0 lun 0 G> ses0: <AHCI SGPIO Enclosure 1.00 0001> SEMB S-E-S 2.00 device G> ses0: SEMB SES Device G> SMP: AP CPU #1 Launched! G> SMP: AP CPU #2 Launched! G> cd0 at ahcich1 bus 0 scbus1 target 0 lun 0 G> cd0: <PIONEER DVD-RW DVRTD10RS 1.00> Removable CD-ROM SCSI-0 device G> SMP: AP CPU #3 Launched! G> cd0: 150.000MB/s transfers (SATA 1.x, UDMA5, ATAPI 12bytes, PIO 8192bytes) G> cd0: Attempt to query device size failed: NOT READY, Medium not present - tray closed G> Timecounter "TSC-low" frequency 9351802 Hz quality 1000 G> WARNING: WITNESS option enabled, expect reduced performance. G> Enter passphrase for ada0p4: ugen0.4: <Generic> at usbus0 G> umass0: <Bulk-In, Bulk-Out, Interface> on usbus0 G> umass0: SCSI over Bulk-Only; quirks = 0x4000 G> umass0:4:0:-1: Attached to scbus4 G> da0 at umass-sim0 bus 0 scbus4 target 0 lun 0 G> da0: <Generic- Multi-Card 1.00> Removable Direct Access SCSI-0 device G> da0: 40.000MB/s transfers G> da0: Attempt to query device size failed: NOT READY, Medium not present G> GEOM_ELI: Device ada0p4.eli created. G> GEOM_ELI: Encryption: AES-CBC 256 G> GEOM_ELI: Crypto: software G> Trying to mount root from zfs:tank0 []... G> <118>Setting hostuuid: f7686241-dbdc-fdec-dda5-b870f48ab815. G> <118>Setting hostid: 0xe53060ee. G> <118>Entropy harvesting: interrupts ethernet point_to_point kickstart. G> <118>Starting file system checks: G> <118>Mounting local file systems:. G> <118>Setting hostname: nucleus. G> <118>Additional TCP/IP options: IPv6 Privacy Addresses IPv6 CPE WANIF=wlan0. G> wlan0: Ethernet address: ec:55:f9:76:ef:7f G> <118>Starting wpa_supplicant. G> <118>Starting Network: lo0 bge0 ath0. G> <118>lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384 G> <118> options=600003<RXCSUM,TXCSUM,RXCSUM_IPV6,TXCSUM_IPV6> G> <118> inet6 ::1 prefixlen 128 G> <118> inet6 fe80::1%lo0 prefixlen 64 scopeid 0x3 G> <118> inet 127.0.0.1 netmask 0xff000000 G> <118> nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL> G> <118>bge0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500 G> <118> options=c019b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,TSO4,VLAN_HWTSO,LINKSTATE> G> <118> ether b8:70:f4:8a:b8:15 G> <118> nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL> G> <118> media: Ethernet autoselect (100baseTX <full-duplex>) G> <118> status: active G> <118>ath0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 2290 G> <118> ether ec:55:f9:76:ef:7f G> <118> nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL> G> <118> media: IEEE 802.11 Wireless Ethernet autoselect mode 11g G> <118> status: associated G> <118>Starting devd. G> G> G> Fatal trap 9: general protection fault while in kernel mode G> cpuid = 1; apic id = 01 G> instruction pointer = 0x20:0xffffffff8034c073 G> stack pointer = 0x28:0xffffff822cdee8c0 G> frame pointer = 0x28:0xffffff822cdee900 G> code segment = base 0x0, limit 0xfffff, type 0x1b G> = DPL 0, pres 1, long 1, def32 0, gran 1 G> processor eflags = interrupt enabled, resume, IOPL = 0 G> current process = 620 (sysctl) G> trap number = 9 G> panic: general protection fault G> cpuid = 1 G> KDB: stack backtrace: G> #0 0xffffffff808543b6 at kdb_backtrace+0x66 G> #1 0xffffffff8082199e at panic+0x1ce G> #2 0xffffffff80b03840 at trap_fatal+0x290 G> #3 0xffffffff80b03f81 at trap+0x241 G> #4 0xffffffff80aef713 at calltrap+0x8 G> #5 0xffffffff8082aead at sysctl_root+0x18d G> #6 0xffffffff8082b138 at userland_sysctl+0x158 G> #7 0xffffffff8082b5ea at sys___sysctl+0xaa G> #8 0xffffffff80b02fff at amd64_syscall+0x32f G> #9 0xffffffff80aef9f7 at Xfast_syscall+0xf7 G> Uptime: 30s G> Dumping 502 out of 7838 MB:..4%..13%..23%..32%..42%..51%..61%..71%..83%..93% G> G> Reading symbols from /boot/kernel/zfs.ko...Reading symbols from /bootdir/boot/kernel/zfs.ko.symbols...done. G> done. G> Loaded symbols for /boot/kernel/zfs.ko G> Reading symbols from /boot/kernel/opensolaris.ko...Reading symbols from /bootdir/boot/kernel/opensolaris.ko.symbols...done. G> done. G> Loaded symbols for /boot/kernel/opensolaris.ko G> Reading symbols from /boot/kernel/geom_eli.ko...Reading symbols from /bootdir/boot/kernel/geom_eli.ko.symbols...done. G> done. G> Loaded symbols for /boot/kernel/geom_eli.ko G> Reading symbols from /boot/kernel/linux.ko...Reading symbols from /bootdir/boot/kernel/linux.ko.symbols...done. G> done. G> Loaded symbols for /boot/kernel/linux.ko G> Reading symbols from /boot/kernel/coretemp.ko...Reading symbols from /bootdir/boot/kernel/coretemp.ko.symbols...done. G> done. G> Loaded symbols for /boot/kernel/coretemp.ko G> Reading symbols from /boot/kernel/sem.ko...Reading symbols from /bootdir/boot/kernel/sem.ko.symbols...done. G> done. G> Loaded symbols for /boot/kernel/sem.ko G> #0 doadump (textdump=Variable "textdump" is not available. G> ) at pcpu.h:229 G> 229 __asm("movq %%gs:%1,%0" : "=r" (td) G> (kgdb) frame 6 G> #6 0xffffffff8034c073 in acpi_cpu_global_cx_lowest_sysctl (oidp=Variable "oidp" is not available. G> ) at /usr/src/sys/dev/acpica/acpi_cpu.c:1269 G> 1269 sc = device_get_softc(cpu_devices[i]); G> (kgdb) p sc G> $1 = {{o = {size = 9184, gen = 0, pos = 8829, ptr = 0xffffff800028d028, G> buf = 0xffffff800028d038 "kbd1 at kbdmux0\r\nctl: CAM Target Layer loaded\r\ncryptosoft0: <software crypto> on motherboard\r\nacpi0: <ACRSYS ACRPRDCT> on motherboard\r\nacpi0: Power Button (fixed)\r\ncpu0: <ACPI CPU> on acpi0\r\ncpu1: <AC"...}, i = {size = 3062, gen = 0, pos = 0, G> ptr = 0xffffff800028d030, buf = 0xffffff800028f418 "????????"}, brk_state = 0, flags = 0, tty = 0xfffffe00041ce000}, {o = {size = 3061, gen = 0, G> pos = 0, ptr = 0xffffff800028d02c, buf = 0xffffff800029000e "??"}, i = {size = 1021, gen = 0, pos = 0, ptr = 0xffffff800028d034, G> buf = 0xffffff8000290c03 ""}, brk_state = 0, flags = 1, tty = 0xfffffe00041cdc00}} G> (kgdb) p cpu_devices[i] G> $2 = 0xfffffe0004706c80 G> (kgdb) p *cpu_devices[i] G> $3 = {ops = 0xfffffe0008925000, link = {tqe_next = 0xfffffe000892c100, tqe_prev = 0xfffffe0004706828}, devlink = {tqe_next = 0xfffffe0004700500, G> tqe_prev = 0xfffffe01fbff98c0}, parent = 0xfffffe00045b0ca0, children = {tqh_first = 0xfffffe000892cca8, tqh_last = 0xffffffff80bc5ce6}, G> driver = 0xfffffe0004706000, devclass = 0xfffffe0004650008, unit = 67305985, nameunit = 0x100f0e0d0c0b0a09 <Address 0x100f0e0d0c0b0a09 out of bounds>, G> desc = 0x1817161514131211 <Address 0x1817161514131211 out of bounds>, busy = 471538201, state = 538910237, devflags = 606282273, flags = 673654309, G> order = 741026345, ivars = 0x3837363534333231, softc = 0x403f3e3d3c3b3a39, sysctl_ctx = {tqh_first = 0x4847464544434241, G> tqh_last = 0x504f4e4d4c4b4a49}, sysctl_tree = 0x5857565554535251} G> (kgdb) bt G> #0 doadump (textdump=Variable "textdump" is not available. G> ) at pcpu.h:229 G> #1 0xffffffff808212ae in kern_reboot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:449 G> #2 0xffffffff80821977 in panic (fmt=0x1 <Address 0x1 out of bounds>) at /usr/src/sys/kern/kern_shutdown.c:637 G> #3 0xffffffff80b03840 in trap_fatal (frame=0x9, eva=Variable "eva" is not available. G> ) at /usr/src/sys/amd64/amd64/trap.c:870 G> #4 0xffffffff80b03f81 in trap (frame=0xffffff822cdee810) at /usr/src/sys/amd64/amd64/trap.c:605 G> #5 0xffffffff80aef713 in calltrap () at /usr/src/sys/amd64/amd64/exception.S:228 G> #6 0xffffffff8034c073 in acpi_cpu_global_cx_lowest_sysctl (oidp=Variable "oidp" is not available. G> ) at /usr/src/sys/dev/acpica/acpi_cpu.c:1269 G> #7 0xffffffff8082aead in sysctl_root (oidp=Variable "oidp" is not available. G> ) at /usr/src/sys/kern/kern_sysctl.c:1513 G> #8 0xffffffff8082b138 in userland_sysctl (td=0xfffffe000bb60000, name=0xffffff822cdeea30, namelen=4, old=Variable "old" is not available. G> ) at /usr/src/sys/kern/kern_sysctl.c:1623 G> #9 0xffffffff8082b5ea in sys___sysctl (td=0xfffffe000bb60000, uap=0xffffff822cdeeb70) at /usr/src/sys/kern/kern_sysctl.c:1549 G> #10 0xffffffff80b02fff in amd64_syscall (td=0xfffffe000bb60000, traced=0) at subr_syscall.c:135 G> #11 0xffffffff80aef9f7 in Xfast_syscall () at /usr/src/sys/amd64/amd64/exception.S:387 G> #12 0x00000008009363ea in ?? () G> Previous frame inner to this frame (corrupt stack?) G> (kgdb) quit G> root_at_nucleus:/usr/obj/usr/src/sys/NUCLEUS # ^D G> G> Script done on Tue Sep 11 12:05:18 2012 G> G> _______________________________________________ G> freebsd-current_at_freebsd.org mailing list G> http://lists.freebsd.org/mailman/listinfo/freebsd-current G> To unsubscribe, send any mail to "freebsd-current-unsubscribe_at_freebsd.org" -- Totus tuus, Glebius.Received on Tue Sep 11 2012 - 14:19:57 UTC
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