Description of problem: 1. Launch RStudio (rstudio-desktop-1.4.1717-2.fc34.x86_64) 2. Open new Rmd 3. Turn ibus-mozc on and Enter multilingual texts like Japanese hiragana. Then, ibus-mozc dies with SEGV at mozc::ibus::(anonymous namespace)::GetSurroundingText(_IBusEngine*, mozc::ibus::SelectionMonitorInterface*, mozc::ibus::(anonymous namespace)::SurroundingTextInfo*) [clone .part.0] [clone .constprop.0] (engine=<optimized out>, Version-Release number of selected component: ibus-mozc-2.25.4190.102-5.fc34 Additional info: reporter: libreport-2.15.2 backtrace_rating: 4 cgroup: 0::/user.slice/user-1000.slice/user/app.slice/dbus-:1.2-com.redhat.imsettings cmdline: /usr/libexec/ibus-engine-mozc --ibus crash_function: __gnu_cxx::__verbose_terminate_handler() executable: /usr/libexec/ibus-engine-mozc journald_cursor: s=56ad17da12da4eed800e68e166be00cd;i=7b37d1;b=f5aaea975c544d17b3b8f1ab25b1ec94;m=113dfa89293;t=5cd7162a6a7c5;x=5d0f1fdfb0e35252 kernel: 5.13.12-200.fc34.x86_64 rootdir: / runlevel: N 5 type: CCpp uid: 1000 Truncated backtrace: Thread no. 1 (10 frames) #2 __gnu_cxx::__verbose_terminate_handler() at ../../../../libstdc++-v3/libsupc++/vterminate.cc:95 #3 __cxxabiv1::__terminate(void (*)()) at ../../../../libstdc++-v3/libsupc++/eh_terminate.cc:48 #4 std::terminate() at ../../../../libstdc++-v3/libsupc++/eh_terminate.cc:58 #5 __cxxabiv1::__cxa_throw(void*, std::type_info*, void (*)(void*)) at ../../../../libstdc++-v3/libsupc++/eh_throw.cc:95 #6 std::__throw_length_error(char const*) at ../../../../../libstdc++-v3/src/c++11/functexcept.cc:82 #7 std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::_M_check_length(unsigned long, unsigned long, char const*) const at /usr/include/c++/11/bits/basic_string.h:323 #8 std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::_M_replace(unsigned long, unsigned long, char const*, unsigned long) at /usr/include/c++/11/bits/basic_string.tcc:452 #9 std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::replace(unsigned long, unsigned long, char const*, unsigned long) at /usr/include/c++/11/bits/basic_string.h:1946 #10 std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::replace(__gnu_cxx::__normal_iterator<char const*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, __gnu_cxx::__normal_iterator<char const*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, __gnu_cxx::__normal_iterator<char const*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, __gnu_cxx::__normal_iterator<char const*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >) at /usr/include/c++/11/bits/basic_string.h:2168 #11 std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::assign<__gnu_cxx::__normal_iterator<char const*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, void>(__gnu_cxx::__normal_iterator<char const*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, __gnu_cxx::__normal_iterator<char const*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >) at /usr/include/c++/11/bits/basic_string.h:1478
Created attachment 1829659 [details] File: backtrace
Created attachment 1829660 [details] File: core_backtrace
Created attachment 1829661 [details] File: cpuinfo
Created attachment 1829662 [details] File: dso_list
Created attachment 1829663 [details] File: environ
Created attachment 1829664 [details] File: limits
Created attachment 1829665 [details] File: maps
Created attachment 1829666 [details] File: mountinfo
Created attachment 1829667 [details] File: open_fds
Created attachment 1829668 [details] File: proc_pid_status
Sorry, this is not a SEGV, but an uncaught length checks error of std::string, as you can see.
Following is what I saw in "coredumpctl debug" (gdb) down #12 mozc::ibus::(anonymous namespace)::GetSurroundingText(_IBusEngine*, mozc::ibus::SelectionMonitorInterface*, mozc::ibus::(anonymous namespace)::SurroundingTextInfo*) [clone .part.0] [clone .constprop.0] (engine=<optimized out>, selection_monitor=<optimized out>, info=0x7ffc45735770) at ../../unix/ibus/mozc_engine.cc:207 207 info->following_text.assign(selection_end_it, surrounding_text.end()); (gdb) p *info $8 = {relative_selected_length = 0, preceding_text = "", selection_text = "", following_text = ""} (gdb) p cursor_pos $9 = 1 (gdb) p anchor_pos $10 = 1 (gdb) p text $11 = 0x7f799006ca00 (gdb) p surrounding_text $12 = ""
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I tested with mozc-2.26.4577.102-2.fc36.x86_64 and looks good unless I'm not missing anything. please try again with the latest version and reopen if this still persists. thanks.