Chromium:59.0.3055.0 (Developer Build) (64-bit)
Revision:991596180e69f17e1bc3828061b420821194031d
OS:Linux
Build:Release

What steps will reproduce the problem?
(1) Hit Ctrl + P
(2) Right click in the print-preview, select 'inspect'
(3) Type location.reload() in the console (1 or 2 times)

terminate called after throwing an instance of 'std::length_error'
  what():  basic_string::append
Received signal 6
#0 0x2b5f432621e7 base::debug::StackTrace::StackTrace()
#1 0x2b5f43261d5f base::debug::(anonymous namespace)::StackDumpSignalHandler()
#2 0x2b5f48c93330 <unknown>
#3 0x2b5f4f193c37 gsignal
#4 0x2b5f4f197028 abort
#5 0x2b5f4eca3535 __gnu_cxx::__verbose_terminate_handler()
#6 0x2b5f4eca16d6 <unknown>
#7 0x2b5f4eca1703 std::terminate()
#8 0x2b5f4eca1922 __cxa_throw
#9 0x2b5f4ecf33a7 std::__throw_length_error()
#10 0x2b5f4ecfe19d std::string::append()
#11 0x2b5f43271f6e base::JSONWriter::BuildJSONString()
#12 0x2b5f43272563 base::JSONWriter::BuildJSONString()
#13 0x2b5f43271e3d base::JSONWriter::Write()
#14 0x2b5f422cb878 content::WebUI::GetJavascriptCall()
#15 0x2b5f422cc4b4 content::WebUIImpl::CallJavascriptFunctionUnsafe()
#16 0x2b5f44c72569 PrintPreviewHandler::SendInitialSettings()
#17 0x2b5f432b61fa base::(anonymous namespace)::PostTaskAndReplyRelay::RunReplyAndSelfDestruct()
#18 0x2b5f432e40bf base::debug::TaskAnnotator::RunTask()
#19 0x2b5f4327a9cd base::MessageLoop::RunTask()
#20 0x2b5f4327ace8 base::MessageLoop::DeferOrRunPendingTask()
#21 0x2b5f4327b206 base::MessageLoop::DoWork()
#22 0x2b5f4327c40a base::(anonymous namespace)::WorkSourceDispatch()
#23 0x2b5f49cabe04 g_main_context_dispatch
#24 0x2b5f49cac048 <unknown>
#25 0x2b5f49cac0ec g_main_context_iteration
#26 0x2b5f4327c2f6 base::MessagePumpGlib::Run()
#27 0x2b5f4327a6f7 base::MessageLoop::RunHandler()
#28 0x2b5f43297d5e base::RunLoop::Run()
#29 0x2b5f43172df8 ChromeBrowserMainParts::MainMessageLoopRun()
#30 0x2b5f41fc9b53 content::BrowserMainLoop::RunMainMessageLoopParts()
#31 0x2b5f41fccb9d content::BrowserMainRunnerImpl::Run()
#32 0x2b5f41fc53b8 content::BrowserMain()
#33 0x2b5f42f2dc4c content::ContentMainRunnerImpl::Run()
#34 0x2b5f43f949ff service_manager::Main()
#35 0x2b5f42f2ccc2 content::ContentMain()
#36 0x2b5f41b870c1 ChromeMain
#37 0x2b5f4f17ef45 __libc_start_main
#38 0x2b5f41b86f2d <unknown>
  r8: 000000000000000a  r9: 00002b5f48ac8980 r10: 0000000000000008 r11: 0000000000000202
 r12: 00000f3e7a956ec0 r13: 0000000000000001 r14: 00007ffd350d4828 r15: 00002b5f4ef463c0
  di: 000000000002486d  si: 000000000002486d  bp: 00000f3e7a7e9258  bx: 00002b5f4f51f868
  dx: 0000000000000006  ax: 0000000000000000  cx: ffffffffffffffff  sp: 00007ffd350d4508
  ip: 00002b5f4f193c37 efl: 0000000000000202 cgf: 0000000000000033 erf: 0000000000000000
 trp: 0000000000000000 msk: 0000000000000000 cr2: 0000000000000000
[end of stack trace]

Interestingly, I can't reproduce the bug in Debug mode. There is probably a timing issue.
 

Deleted: out-12.ogv 2.1 MB

	out-12.ogv 2.1 MB View Download