webapp-container crashed with SIGSEGV in malloc_consolidate()

amazon app. It just crashed I don't know why. After it crashed the bug reporter came up.

ProblemType: Crash
DistroRelease: Ubuntu 16.04
Package: webapp-container 0.23+16.04.20160322-0ubuntu1
ProcVersionSignature: Ubuntu 4.4.0-16.32-generic 4.4.6
Uname: Linux 4.4.0-16-generic x86_64
ApportVersion: 2.20.1-0ubuntu1
Architecture: amd64
CurrentDesktop: Unity
Date: Sun Apr 3 16:36:39 2016
ExecutablePath: /usr/bin/webapp-container
InstallationDate: Installed on 2016-03-28 (6 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Beta amd64 (20160323)
ProcCmdline: webapp-container --app-id=ubuntu-amazon-default --webapp --enable-back-forward http://www.amazon.com/?tag=u1webapp-20
ProcEnviron:
 PATH=(custom, no user)
 SHELL=/bin/bash
 LANG=en_US.UTF-8
 LANGUAGE=en_US
 XDG_RUNTIME_DIR=<set>
SegvAnalysis:
 Segfault happened at: 0x7fa8e6952738 <malloc_consolidate+280>: mov 0x8(%rbx),%rax
 PC (0x7fa8e6952738) ok
 source "0x8(%rbx)" (0x7fa800000008) not located in a known VMA region (needed readable region)!
 destination "%rax" ok
 Stack memory exhausted (SP below stack segment)
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: webbrowser-app
StacktraceTop:
 malloc_consolidate (av=av@entry=0x7fa8b0000020) at malloc.c:4168
 _int_malloc (av=av@entry=0x7fa8b0000020, bytes=bytes@entry=1080) at malloc.c:3451
 __GI___libc_malloc (bytes=1080) at malloc.c:2914
 operator new(unsigned long) () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
 ?? () from /usr/lib/x86_64-linux-gnu/libOxideQtCore.so.0
Title: webapp-container crashed with SIGSEGV in malloc_consolidate()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo