Comment 26 for bug 2017980

Update from https://bugs.chromium.org/p/chromium/issues/detail?id=1459821 as it's not public visible:

```
@Reporter, Thanks for filing the Issue. Please find the magic signature & stack trace for the crash id# 8e7f32382b1ddc1c

Magic signature :
[Assert] sandbox::`anonymous namespace'::CheckCloneNewUserErrno

Stack Trace
Thread 0 chrome (id: 0x00010cf6)crashedMAGIC SIGNATURE THREADcontent_copy
0x0000560a0003ddb3(chrome -immediate_crash.h:146)??logging::LogMessage::~LogMessage()
0x0000560a022d31f7(chrome -logging.cc:1107)??logging::ErrnoLogMessage::~ErrnoLogMessage()
0x0000560a0619dcdd(chrome -logging.cc:1101)logging::ErrnoLogMessage::~ErrnoLogMessage()
0x0000560a01a7f08d(chrome -check.cc:198)??logging::CheckError::~CheckError()
0x0000560a0735454a(chrome -credentials.cc:126)sandbox::(anonymous namespace)::CheckCloneNewUserErrno(int)
0x0000560a01f159fc(chrome -credentials.cc:280)sandbox::Credentials::CanCreateProcessInNewUserNS()
0x0000560a01f156ff(chrome -zygote_host_impl_linux.cc:114)content::ZygoteHostImpl::Init(base::CommandLine const&)
0x0000560a01f0efc4(chrome -content_main_runner_impl.cc:382)content::(anonymous namespace)::InitializeZygoteSandboxForBrowserProcess(base::CommandLine const&)
0x0000560a01f0efc4(chrome -content_main_runner_impl.cc:1033)content::ContentMainRunnerImpl::Initialize(content::ContentMainParams)
0x0000560a0204a6bd(chrome -content_main.cc:301)content::RunContentProcess(content::ContentMainParams, content::ContentMainRunner*)
0x0000560a0204a6bd(chrome -content_main.cc:343)content::ContentMain(content::ContentMainParams)
0x0000560a020487ff(chrome -chrome_main.cc:187)ChromeMain
0x00007f29a5029d8f(libc.so.6 + 0x00029d8f)
0x00007f29a5f4c03f(ld-linux-x86-64.so.2 + 0x0003a03f)
0x00007f29a5029e3f(libc.so.6 + 0x00029e3f)
0x0000560a033991c9(chrome + 0x0000000005c281c9)_start
0x00007ffc8a640b07

As per crash ID (8e7f32382b1ddc1c) adding Internals>Core
[...]
```