Segmentation fault when trying to add an IN or OUT filter from past history #1614
Description
lnav version
Compiled from upstream code as of 2026-01-08
Describe the bug
When trying to add an IN filter navigating the history back in the list of previous filters added, "lnav" unexpectedly.
To Reproduce
- Open lnav
- Go to the "Text Filters" menu
- Attempt to add an IN filter ("i")
- Instead of typing a string or expression, arrow up to revisit the history
- On hitting "ENTER" to accept the filter, "lnav" crashes
- Same occurs when trying to add an "OUT filter"
The stack dump for the process looks as follows :
Program terminated with signal SIGSEGV, Segmentation fault.
Downloading source file /usr/src/debug/glibc-2.41-11.fc42.x86_64/nptl/pthread_join_common.c
#0 __pthread_clockjoin_ex (threadid=0, thread_return=thread_return@entry=0x1ed42ed8, clockid=clockid@entry=0, abstime=abstime@entry=0x0, block=block@entry=true) at pthread_join_common.c:43
43 if (INVALID_NOT_TERMINATED_TD_P (pd))
[Current thread is 1 (Thread 0x7fc29397cc40 (LWP 399732))]
(gdb) bt
#0 __pthread_clockjoin_ex (threadid=0, thread_return=thread_return@entry=0x1ed42ed8, clockid=clockid@entry=0, abstime=abstime@entry=0x0, block=block@entry=true) at pthread_join_common.c:43
#1 0x00007fc294367b13 in ___pthread_join (threadid=<optimized out>, thread_return=thread_return@entry=0x1ed42ed8) at pthread_join.c:24
#2 0x0000000000d24707 in stop_inputlayer (ti=ti@entry=0x1ed383c0) at in.c:2787
#3 0x0000000000d39169 in free_terminfo_cache (ti=ti@entry=0x1ed383c0) at termdesc.c:197
#4 0x0000000000d29904 in notcurses_stop (nc=0x1ed380c0) at notcurses.c:1545
#5 0x00000000004c195a in screen_curses::log_crash_recover (this=0x7fff75d67e30) at /home/user/Lnav/lnav/src/view_curses.hh:67
#6 0x0000000000b4933e in operator()<const termios*> (__closure=<synthetic pointer>, termios=0x7fff75d68ea4) at lnav_log.cc:749
#7 operator|<std::optional<const termios*>&, sigabrt(int, siginfo_t*, void*)::<lambda(auto:33)> > (t=std::optional = {...}, f=...) at /home/user/Lnav/lnav/src/base/opt_util.hh:69
#8 sigabrt (sig=<optimized out>, info=<optimized out>, ctx=<optimized out>) at lnav_log.cc:747
#9 0x0000000000d3e4e9 in invoke_old (old=0x1043200 <old_segv>, signo=11, sinfo=0x1ed44170, v=0x1ed44040) at unixsig.c:136
#10 fatal_handler (signo=11, siginfo=0x1ed44170, v=0x1ed44040) at unixsig.c:151
#11 <signal handler called>
#12 mapbox::util::variant<long, role_t, text_attrs, intern_string_t, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::shared_ptr<logfile>, bookmark_metadata*, string_fragment, block_elem_t, styling::color_unit, ui_icon_t, char const*, ui_command, text_format_t>::get<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, (void*)0> (this=0x18) at ./mapbox/variant.hpp:720
#13 string_attr_wrapper<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >::get<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > (this=<optimized out>)
at base/attr_line.hh:96
#14 lnav::prompt::rl_completion (this=0xfbeb20 <lnav::prompt::get()::retval>, tc=...) at lnav.prompt.cc:532
#15 0x0000000000943f1e in textinput_curses::handle_key (this=0x1ed32660, ch=...) at textinput_curses.cc:1223
#16 0x0000000000699db8 in listview_curses::handle_key_using_delegates (this=this@entry=0xfc5cc8 <lnav_data+10408>, ch=...) at listview_curses.cc:208
#17 listview_curses::handle_key (this=this@entry=0xfc5cc8 <lnav_data+10408>, ch=...) at listview_curses.cc:219
#18 0x00000000004b9a86 in handle_config_ui_key (nc=0x1ed380c0, ch=..., keyseq=0x7fff75d679f0 "n4201761") at lnav.cc:756
#19 handle_key (nc=0x1ed380c0, ch=..., keyseq=0x7fff75d679f0 "n4201761") at lnav.cc:826
#20 0x000000000068cb54 in std::function<bool(notcurses*, ncinput const&, char const*)>::operator() (this=0xfd07a0 <lnav_data+54144>, __args#0=<optimized out>, __args#1=..., __args#2=<optimized out>)
at /usr/include/c++/15/bits/std_function.h:593
#21 input_dispatcher::new_input (this=this@entry=0xfd0778 <lnav_data+54104>, current_time=..., nc=0x1ed380c0, ch=...) at input_dispatcher.cc:114
#22 0x00000000004beb5f in looper () at lnav.cc:2322
#23 0x00000000004778c5 in main (argc=<optimized out>, argv=<optimized out>) at lnav.cc:4450
Attached the debug log to this issue.