The "mgaapplet-upgrade-helper" program crashed. Drakbug-15.54 caught it.

I was upgrading from mga2 to mga3.

SEGV
Glibc's trace:
4: /usr/lib/perl5/5.14.2/x86_64-linux-thread-multi/CORE/libperl.so(Perl_sighandler+0x1f0) [0x7fa7c9fea510]
5: /lib64/libpthread.so.0(+0xef70) [0x7fa7c9251f70]
6: /lib64/libharfbuzz.so.0(hb_buffer_add_utf8+0x3d0) [0x7fa7b7ad75b0]
7: /usr/lib64/pango/1.8.0/modules/pango-basic-fc.so(+0x1b54) [0x7fa7b7d62b54]
8: /usr/lib/../lib64/libpango-1.0.so.0(pango_shape+0x4a) [0x7fa7c1ef218a]
9: /usr/lib/../lib64/libpango-1.0.so.0(+0xf9f1) [0x7fa7c1ed59f1]
10: /usr/lib/../lib64/libpango-1.0.so.0(+0xfca9) [0x7fa7c1ed5ca9]
11: /usr/lib/../lib64/libpango-1.0.so.0(+0x22677) [0x7fa7c1ee8677]
12: /usr/lib/../lib64/libpango-1.0.so.0(+0x234c6) [0x7fa7c1ee94c6]
13: /usr/lib/../lib64/libgtk-x11-2.0.so.0(+0x128aa1) [0x7fa7c0ec2aa1]
14: /usr/lib/../lib64/libgtk-x11-2.0.so.0(+0x12a3dd) [0x7fa7c0ec43dd]
15: /lib/../lib64/libgobject-2.0.so.0(g_cclosure_marshal_VOID__BOXEDv+0x8d) [0x7fa7c5406fcd]
16: /lib/../lib64/libgobject-2.0.so.0(+0xfe3c) [0x7fa7c5403e3c]
17: /lib/../lib64/libgobject-2.0.so.0(g_signal_emit_valist+0x421) [0x7fa7c541c711]
18: /lib/../lib64/libgobject-2.0.so.0(g_signal_emit_by_name+0x504) [0x7fa7c541d724]
19: /usr/lib/../lib64/libgtk-x11-2.0.so.0(+0x1a3473) [0x7fa7c0f3d473]

Perl's trace:
standalone::bug_handler() called from /usr/lib/libDrakX/standalone.pm:224
standalone::__ANON__() called from /usr/lib/libDrakX/mygtk2.pm:1212
(eval)() called from /usr/lib/libDrakX/mygtk2.pm:1212
mygtk2::MagicWindow::AUTOLOAD() called from /usr/lib/libDrakX/ugtk2.pm:772
ugtk2::show() called from /usr/lib/libDrakX/ugtk2.pm:765
ugtk2::main() called from /usr/sbin/mgaapplet-upgrade-helper:119
main::run_gurpmi() called from /usr/sbin/mgaapplet-upgrade-helper:436
main::upgrade() called from /usr/sbin/mgaapplet-upgrade-helper:75

Theme name: oxygen-gtk
Kernel version = 3.4.45-desktop-1.mga2
Distribution=Mageia release 3 (Official) for x86_64
CPU=Intel(R) Core(TM) i7 CPU       Q 740  @ 1.73GHz

$ lspcidrake -v
unknown         : Intel Corporation|Core Processor Integrated Memory Controller Channel 1 Thermal Control Registers [BRIDGE_HOST] (vendor:8086 device:2cab subv:8086 subd:8086) (rev: 04)
unknown         : Intel Corporation|Core Processor Integrated Memory Controller Channel 1 Rank Registers [BRIDGE_HOST] (vendor:8086 device:2caa subv:8086 subd:8086) (rev: 04)
unknown         : Intel Corporation|Core Processor Integrated Memory Controller Channel 1 Address Registers [BRIDGE_HOST] (vendor:8086 device:2ca9 subv:8086 subd:8086) (rev: 04)
unknown         : Intel Corporation|Core Processor Integrated Memory Controller Channel 1 Control Registers [BRIDGE_HOST] (vendor:8086 device:2ca8 subv:8086 subd:8086) (rev: 04)
unknown         : Intel Corporation|Core Processor Integrated Memory Controller Channel 0 Thermal Control Registers [BRIDGE_HOST] (vendor:8086 device:2ca3 subv:8086 subd:8086) (rev: 04)
unknown         : Intel Corporation|Core Processor Integrated Memory Controller Channel 0 Rank Registers [BRIDGE_HOST] (vendor:8086 device:2ca2 subv:8086 subd:8086) (rev: 04)
unknown         : Intel Corporation|Core Processor Integrated Memory Controller Channel 0 Address Registers [BRIDGE_HOST] (vendor:8086 device:2ca1 subv:8086 subd:8086) (rev: 04)
unknown         : Intel Corporation|Core Processor Integrated Memory Controller Channel 0 Control Registers [BRIDGE_HOST] (vendor:8086 device:2ca0 subv:8086 subd:8086) (rev: 04)
unknown         : Intel Corporation|Core Processor Integrated Memory Controller Test Registers [BRIDGE_HOST] (vendor:8086 device:2c9c subv:8086 subd:8086) (rev: 04)
unknown         : Intel Corporation|Core Processor Integrated Memory Controller Target Address Decoder [BRIDGE_HOST] (vendor:8086 device:2c99 subv:8086 subd:8086) (rev: 04)
unknown         : Intel Corporation|Core Processor Integrated Memory Controller [BRIDGE_HOST] (vendor:8086 device:2c98 subv:8086 subd:8086) (rev: 04)
unknown         : Intel Corporation|Core Processor QPI Physical 0 [BRIDGE_HOST] (vendor:8086 device:2c91 subv:8086 subd:8086) (rev: 04)
i7core_edac     : Intel Corporation|Core Processor QPI Link 0 [BRIDGE_HOST] (vendor:8086 device:2c90 subv:8086 subd:8086) (rev: 04)
unknown         : Intel Corporation|Core Processor QuickPath Architecture System Address Decoder [BRIDGE_HOST] (vendor:8086 device:2c81 subv:8086 subd:8086) (rev: 04)
unknown         : Intel Corporation|Core Processor QuickPath Architecture Generic Non-Core Registers [BRIDGE_HOST] (vendor:8086 device:2c52 subv:8086 subd:8086) (rev: 04)
r8169           : Realtek Semiconductor Co., Ltd.|RTL8111/8168 PCI Express Gigabit Ethernet controller [NETWORK_ETHERNET] (vendor:10ec device:8168 subv:1028 subd:046e) (rev: 06)
xhci_hcd        : NEC Corporation|uPD720200 USB 3.0 Host Controller [SERIAL_USB] (vendor:1033 device:0194 subv:1028 subd:046e) (rev: 03)
iwlwifi         : Intel Corporation|Centrino Wireless-N 1000 [Condor Peak] [NETWORK_OTHER] (vendor:8086 device:0083 subv:8086 subd:1325)
snd_hda_intel   : NVIDIA Corporation|GF108 High Definition Audio Controller [MULTIMEDIA_AUDIO_DEV] (vendor:10de device:0bea subv:1028 subd:046e) (rev: a1)
Card:NVIDIA GeForce 400 series and later: NVIDIA Corporation|GF108 [GeForce GT 435M] [DISPLAY_VGA] (vendor:10de device:0df2 subv:1028 subd:046e) (rev: a1)
intel_ips       : Intel Corporation|5 Series/3400 Series Chipset Thermal Subsystem [SIGNAL_OTHER] (vendor:8086 device:3b32 subv:1028 subd:046e) (rev: 06)
i2c_i801        : Intel Corporation|5 Series/3400 Series Chipset SMBus Controller [SERIAL_SMBUS] (vendor:8086 device:3b30 subv:1028 subd:046e) (rev: 06)
ahci            : Intel Corporation|5 Series/3400 Series Chipset 6 port SATA AHCI Controller [STORAGE_SATA] (vendor:8086 device:3b2f subv:1028 subd:046e) (rev: 06)
iTCO_wdt        : Intel Corporation|Mobile 5 Series Chipset LPC Interface Controller [BRIDGE_ISA] (vendor:8086 device:3b0b subv:1028 subd:046e) (rev: 06)
unknown         : Intel Corporation|82801 Mobile PCI Bridge [BRIDGE_PCI] (vendor:8086 device:2448) (rev: a6)
ehci_hcd        : Intel Corporation|5 Series/3400 Series Chipset USB2 Enhanced Host Controller [SERIAL_USB] (vendor:8086 device:3b34 subv:1028 subd:046e) (rev: 06)
shpchp          : Intel Corporation|5 Series/3400 Series Chipset PCI Express Root Port 6 [BRIDGE_PCI] (vendor:8086 device:3b4c) (rev: 06)
shpchp          : Intel Corporation|5 Series/3400 Series Chipset PCI Express Root Port 5 [BRIDGE_PCI] (vendor:8086 device:3b4a) (rev: 06)
shpchp          : Intel Corporation|5 Series/3400 Series Chipset PCI Express Root Port 4 [BRIDGE_PCI] (vendor:8086 device:3b48) (rev: 06)
shpchp          : Intel Corporation|5 Series/3400 Series Chipset PCI Express Root Port 2 [BRIDGE_PCI] (vendor:8086 device:3b44) (rev: 06)
shpchp          : Intel Corporation|5 Series/3400 Series Chipset PCI Express Root Port 1 [BRIDGE_PCI] (vendor:8086 device:3b42) (rev: 06)
snd_hda_intel   : Intel Corporation|5 Series/3400 Series Chipset High Definition Audio [MULTIMEDIA_AUDIO_DEV] (vendor:8086 device:3b56 subv:1028 subd:046e) (rev: 06)
ehci_hcd        : Intel Corporation|5 Series/3400 Series Chipset USB2 Enhanced Host Controller [SERIAL_USB] (vendor:8086 device:3b3c subv:1028 subd:046e) (rev: 06)
mei             : Intel Corporation|5 Series/3400 Series Chipset HECI Controller [COMMUNICATION_OTHER] (vendor:8086 device:3b64 subv:1028 subd:046e) (rev: 06)
unknown         : Intel Corporation|Core Processor QPI Routing and Protocol Registers [SYSTEM_OTHER] (vendor:8086 device:d151) (rev: 11)
unknown         : Intel Corporation|Core Processor QPI Link [SYSTEM_OTHER] (vendor:8086 device:d150) (rev: 11)
unknown         : Intel Corporation|Core Processor Miscellaneous Registers [SYSTEM_OTHER] (vendor:8086 device:d158) (rev: 11)
unknown         : Intel Corporation|Core Processor System Control and Status Registers [SYSTEM_OTHER] (vendor:8086 device:d157) (rev: 11)
unknown         : Intel Corporation|Core Processor Semaphore and Scratchpad Registers [SYSTEM_OTHER] (vendor:8086 device:d156) (rev: 11)
unknown         : Intel Corporation|Core Processor System Management Registers [SYSTEM_OTHER] (vendor:8086 device:d155) (rev: 11)                                                                                  
shpchp          : Intel Corporation|Core Processor PCI Express Root Port 1 [BRIDGE_PCI] (vendor:8086 device:d138) (rev: 11)                                                                                        
unknown         : Intel Corporation|Core Processor DMI [BRIDGE_HOST] (vendor:8086 device:d132 subv:1028 subd:046e) (rev: 11)                                                                                       
hub             : Linux 3.4.45-desktop-1.mga2 ehci_hcd|EHCI Host Controller [Hub|Unused|Full speed (or root) hub] (vendor:1d6b device:0002)                                                                        
hub             : Intel Corp.|Integrated Rate Matching Hub [Hub|Unused|Full speed (or root) hub] (vendor:8087 device:0020)                                                                                         
wacom           : Wacom Co.,Ltd.|Intuos5 touch M [Human Interface Device|Boot Interface Subclass|Mouse] (vendor:056a device:0027)                                                                                  
hub             : Linux 3.4.45-desktop-1.mga2 xhci_hcd|xHCI Host Controller [Hub|Unused|Full speed (or root) hub] (vendor:1d6b device:0003)                                                                        
hub             : Linux 3.4.45-desktop-1.mga2 xhci_hcd|xHCI Host Controller [Hub|Unused|Full speed (or root) hub] (vendor:1d6b device:0002)                                                                        
hub             : Linux 3.4.45-desktop-1.mga2 ehci_hcd|EHCI Host Controller [Hub|Unused|Full speed (or root) hub] (vendor:1d6b device:0002)                                                                        
hub             : Intel Corp.|Integrated Rate Matching Hub [Hub|Unused|Full speed (or root) hub] (vendor:8087 device:0020)                                                                                         
btusb           : Broadcom Corp|BRCM2070 BT 2.1 + HS USB Module [Wireless|Radio Frequency|Bluetooth] (vendor:0a5c device:21b2)                                                                                     
uvcvideo        : CN07CN2C786640AB0CEEA00|Laptop_Integrated_Webcam_2HDM [Video|Video Control] (vendor:0408 device:2fb1