+1 on amd64
With debug symbols, this is what a backtrace gave me:

Program received signal SIGSEGV, Segmentation fault.
0x00007ffff68de2ee in SiteInstance::GetEffectiveURL (profile=0x7ffff8861900, url=...) at content/browser/site_instance.cc:192
192	content/browser/site_instance.cc: No such file or directory.
	in content/browser/site_instance.cc
(gdb) bt
#0  0x00007ffff68de2ee in SiteInstance::GetEffectiveURL (profile=0x7ffff8861900, url=...) at content/browser/site_instance.cc:192
#1  0x00007ffff68de5e9 in SiteInstance::GetSiteForURL (profile=<value optimized out>, real_url=<value optimized out>) at content/browser/site_instance.cc:129
#2  0x00007ffff687951f in BrowsingInstance::GetSiteInstanceForURL (this=0x7ffff8b7aa00, url=...) at content/browser/browsing_instance.cc:78
#3  0x00007ffff54358ec in ExtensionProcessManager::CreateBackgroundHost (this=0x7ffff8852000, extension=0x7ffff8811680, url=...) at chrome/browser/extensions/extension_process_manager.cc:181
#4  0x00007ffff543556c in CreateBackgroundHost (this=0x7ffff8852000, type=<value optimized out>, source=<value optimized out>, details=<value optimized out>)
    at chrome/browser/extensions/extension_process_manager.cc:64
#5  CreateBackgroundHosts (this=0x7ffff8852000, type=<value optimized out>, source=<value optimized out>, details=<value optimized out>)
    at chrome/browser/extensions/extension_process_manager.cc:71
#6  ExtensionProcessManager::Observe (this=0x7ffff8852000, type=<value optimized out>, source=<value optimized out>, details=<value optimized out>)
    at chrome/browser/extensions/extension_process_manager.cc:283
#7  0x00007ffff5dc9eea in NotificationService::Notify (this=0x7ffff8858000, type=..., source=..., details=...) at content/common/notification_service.cc:113
#8  0x00007ffff51205c2 in ExtensionService::OnLoadedInstalledExtensions (this=0x7ffff8849800) at chrome/browser/extensions/extension_service.cc:1315
#9  0x00007ffff512a5a3 in ExtensionService::LoadAllExtensions (this=<value optimized out>) at chrome/browser/extensions/extension_service.cc:843
#10 0x00007ffff512c06e in ExtensionService::Init (this=0x7ffff8849800) at chrome/browser/extensions/extension_service.cc:504
#11 0x00007ffff51dadc0 in ProfileImpl::InitExtensions (this=0x7ffff8861900) at chrome/browser/profiles/profile_impl.cc:382
#12 0x00007ffff51e0bbe in ProfileManager::AddProfile (this=0x7ffff8b3c820, profile=0x7ffff8861900, init_extensions=true) at chrome/browser/profiles/profile_manager.cc:239
#13 0x00007ffff51e0c6b in ProfileManager::GetProfile (this=0x7ffff8b3c820, profile_dir=..., init_extensions=true) at chrome/browser/profiles/profile_manager.cc:215
#14 0x00007ffff51e0ced in ProfileManager::GetDefaultProfile (this=0x7ffff8b3c820, user_data_dir=<value optimized out>) at chrome/browser/profiles/profile_manager.cc:166
#15 0x00007ffff50e5457 in CreateProfile (parameters=...) at chrome/browser/browser_main.cc:785
#16 BrowserMain (parameters=...) at chrome/browser/browser_main.cc:1453
#17 0x00007ffff50df4a9 in RunNamedProcessTypeMain (argc=<value optimized out>, argv=<value optimized out>) at chrome/app/chrome_main.cc:476
#18 ChromeMain (argc=<value optimized out>, argv=<value optimized out>) at chrome/app/chrome_main.cc:787
#19 0x00007ffff50e00d1 in main (argc=1, argv=0x7fffffffe1d8) at chrome/app/chrome_exe_main_gtk.cc:49