Full debug info:

(gdb) bt
#0  __memmove_avx_unaligned_erms ()
    at ../sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S:416
#1  0x00007fffed8664c7 in memcpy (__len=1434303056, __src=0x0, 
    __dest=<optimised out>) at /usr/include/x86_64-linux-gnu/bits/string3.h:53
#2  google::protobuf::io::CodedOutputStream::WriteRaw (this=0x7fffffffd570, 
    data=0x0, size=1434303056) at google/protobuf/io/coded_stream.cc:730
#3  0x00007fffed8625c5 in 
google::protobuf::MessageLite::InternalSerializeWithCachedSizesToArray 
(this=0x5555557f7530, deterministic=<optimised out>, 
    target=0x7fff92824010 "\n\rMIR_VideoInit")
    at google/protobuf/message_lite.cc:229
#4  0x00007fffee650508 in invocation_for (this=this@entry=0x5555557f7670, 
    method_name=..., request=request@entry=0x5555557f7530, 
    num_side_channel_fds=0) at ./src/client/rpc/mir_basic_rpc_channel.cpp:155
#5  0x00007fffee6511ca in 
mir::client::rpc::MirProtobufRpcChannel::call_method(std::__cxx11::basic_string<char,
 std::char_traits<char>, std::allocator<char> > const&, 
google::protobuf::MessageLite const*, google::protobuf::MessageLite*, 
google::protobuf::Closure*) (this=this@entry=0x5555557f7670, method_name=..., 
    parameters=parameters@entry=0x5555557f7530, 
    response=response@entry=0x5555557f7b00, 
    complete=complete@entry=0x5555557f7ce0)
    at ./src/client/rpc/mir_protobuf_rpc_channel.cpp:230
#6  0x00007fffee63c827 in 
mir::client::rpc::DisplayServer::connect(mir::protobuf::ConnectParameters 
const*, mir::protobuf::Connection*, google::protobuf::Closure*) 
(this=<optimised out>, request=0x5555557f7530, response=0x5555557f7b00, 
    done=0x5555557f7ce0) at ./src/client/rpc/mir_display_server.cpp:36
#7  0x00007fffee608635 in connect (context=0x7fffffffe290, 
    callback=0x7fffee6060b0 <(anonymous namespace)::assign_result(void*, 
void**) [clone .lto_priv.461] [clone .lto_priv.463]>, 
    app_name=0x7ffff7586c60 <__PRETTY_FUNCTION__.12305> "MIR_VideoInit", 
    this=0x5555557f6b30) at ./src/client/mir_connection.cpp:658
#8  mir_connect (socket_file=<optimised out>, 
    name=0x7ffff7586c60 <__PRETTY_FUNCTION__.12305> "MIR_VideoInit", 
    callback=callback@entry=0x7fffee6060b0 <(anonymous 
namespace)::assign_result(void*, void**) [clone .lto_priv.461] [clone 
.lto_priv.463]>, 
    context=context@entry=0x7fffffffe290)
    at ./src/client/mir_connection_api.cpp:74
#9  0x00007fffee60946b in mir_connect_sync (server=<optimised out>, 
    app_name=<optimised out>) at ./src/client/mir_connection_api.cpp:100
#10 0x00007ffff756a090 in MIR_VideoInit (_this=0x5555557f66b0)
    at ./src/video/mir/SDL_mirvideo.c:300
#11 0x00007ffff7553ee6 in SDL_VideoInit_REAL (driver_name=<optimised out>, 
    driver_name@entry=0x0) at ./src/video/SDL_video.c:517
#12 0x00007ffff74ba4e7 in SDL_InitSubSystem_REAL (flags=16944)
    at ./src/SDL.c:173
#13 0x000055555555e5fb in main ()


** Summary changed:

- neverball randomly crashes on startup in 
google::protobuf::MessageLite::InternalSerializeWithCachedSizesToArray
+ neverball randomly crashes on startup in 
google::protobuf::MessageLite::InternalSerializeWithCachedSizesToArray from 
mir_connect_sync

** Changed in: libsdl2 (Ubuntu)
   Importance: Undecided => Critical

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https://bugs.launchpad.net/bugs/1667542

Title:
  neverball randomly crashes on startup in
  google::protobuf::MessageLite::InternalSerializeWithCachedSizesToArray
  from mir_connect_sync

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