aaron  ~  134  /usr/local/bin/peek 
Error: Failed to open file “/home/aaron/.config/gtk-3.0/settings.ini”: No such file or directory
Using screen recorder backend ffmpeg
free(): double free detected in tcache 2
Aborted (core dumped)

 aaron  ~  coredumpctl dump peek
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           PID: 4386 (peek)
           UID: 1000 (aaron)
           GID: 1000 (aaron)
        Signal: 6 (ABRT)
     Timestamp: Wed 2019-02-13 10:34:38 CET (1min 40s ago)
  Command Line: /usr/local/bin/peek
    Executable: /usr/local/bin/peek
 Control Group: /user.slice/user-1000.slice/session-2.scope
          Unit: session-2.scope
         Slice: user-1000.slice
       Session: 2
     Owner UID: 1000 (aaron)
       Boot ID: bcf6f9cfe589415dafdad2d3af525851
    Machine ID: 1748261118254a818f5cfcac35347eb0
      Hostname: villamvonat
       Storage: /var/lib/systemd/coredump/core.peek.1000.bcf6f9cfe589415dafdad2d3af525851.4386.1550050478000000.lz4
       Message: Process 4386 (peek) of user 1000 dumped core.
                
                Stack trace of thread 4386:
                #0  0x00007f2c4919553f raise (libc.so.6)
                #1  0x00007f2c4917f895 abort (libc.so.6)
                #2  0x00007f2c491d8927 __libc_message (libc.so.6)
                #3  0x00007f2c491df25c malloc_printerr (libc.so.6)
                #4  0x00007f2c491e0d45 _int_free (libc.so.6)
                #5  0x00007f2c49c38ed2 g_free (libglib-2.0.so.0)
                #6  0x0000000000424633 _vala_array_destroy (peek)
                #7  0x000000000042466a _vala_array_free (peek)
                #8  0x00000000004241d7 peek_post_processing_ffmpeg_post_processor_generate_animation_async_co (peek)
                #9  0x00000000004236df peek_post_processing_ffmpeg_post_processor_generate_animation_async_ready (peek)
                #10 0x000000000041f007 peek_post_processing_cli_post_processor_spawn_command_async_async_ready_wrapper (peek)
                #11 0x00007f2c49def834 n/a (libgio-2.0.so.0)
                #12 0x00007f2c49df0196 n/a (libgio-2.0.so.0)
                #13 0x000000000041f932 peek_post_processing_cli_post_processor_spawn_command_async_co (peek)
                #14 0x000000000041f1c4 peek_post_processing_cli_post_processor_spawn_command_async_ready (peek)
                #15 0x00007f2c49def834 n/a (libgio-2.0.so.0)
                #16 0x00007f2c49def86d n/a (libgio-2.0.so.0)
                #17 0x00007f2c49c2f97b n/a (libglib-2.0.so.0)
                #18 0x00007f2c49c3306d g_main_context_dispatch (libglib-2.0.so.0)
                #19 0x00007f2c49c33438 n/a (libglib-2.0.so.0)
                #20 0x00007f2c49c33762 g_main_loop_run (libglib-2.0.so.0)
                #21 0x00007f2c49641de7 gtk_dialog_run (libgtk-3.so.0)
                #22 0x0000000000435f9a peek_ui_application_window_show_file_chooser (peek)
                #23 0x0000000000431760 __lambda5_ (peek)
                #24 0x000000000043177f ___lambda5__peek_recording_screen_recorder_recording_postprocess_started (peek)
                #25 0x00007f2c49d153dd g_closure_invoke (libgobject-2.0.so.0)
                #26 0x00007f2c49d28983 n/a (libgobject-2.0.so.0)
                #27 0x00007f2c49d31aaa g_signal_emit_valist (libgobject-2.0.so.0)
                #28 0x00007f2c49d32584 g_signal_emit_by_name (libgobject-2.0.so.0)
                #29 0x0000000000427a58 peek_recording_base_screen_recorder_finalize_recording (peek)
                #30 0x0000000000429c2f ___lambda22_ (peek)
                #31 0x0000000000429ccd ____lambda22__gasync_ready_callback (peek)
                #32 0x00007f2c49def834 n/a (libgio-2.0.so.0)
                #33 0x00007f2c49def86d n/a (libgio-2.0.so.0)
                #34 0x00007f2c49c2f97b n/a (libglib-2.0.so.0)
                #35 0x00007f2c49c3306d g_main_context_dispatch (libglib-2.0.so.0)
                #36 0x00007f2c49c33438 n/a (libglib-2.0.so.0)
                #37 0x00007f2c49c334d0 g_main_context_iteration (libglib-2.0.so.0)
                #38 0x00007f2c49e03d25 g_application_run (libgio-2.0.so.0)
                #39 0x000000000040db87 _vala_main (peek)
                #40 0x000000000040dbca main (peek)
                #41 0x00007f2c49181413 __libc_start_main (libc.so.6)
                #42 0x000000000040da0e _start (peek)
                
                Stack trace of thread 4421:
                #0  0x00007f2c49254efd syscall (libc.so.6)
                #1  0x00007f2c49c7b50e g_cond_wait_until (libglib-2.0.so.0)
                #2  0x00007f2c49c04fa1 n/a (libglib-2.0.so.0)
                #3  0x00007f2c49c5cdf2 n/a (libglib-2.0.so.0)
                #4  0x00007f2c49c5c2aa n/a (libglib-2.0.so.0)
                #5  0x00007f2c4932b58e start_thread (libpthread.so.0)
                #6  0x00007f2c4925a6a3 __clone (libc.so.6)
                
                Stack trace of thread 4387:
                #0  0x00007f2c4924f421 __poll (libc.so.6)
                #1  0x00007f2c49c333a6 n/a (libglib-2.0.so.0)
                #2  0x00007f2c49c334d0 g_main_context_iteration (libglib-2.0.so.0)
                #3  0x00007f2c49c33521 n/a (libglib-2.0.so.0)
                #4  0x00007f2c49c5c2aa n/a (libglib-2.0.so.0)
                #5  0x00007f2c4932b58e start_thread (libpthread.so.0)
                #6  0x00007f2c4925a6a3 __clone (libc.so.6)
                
                Stack trace of thread 4419:
                #0  0x00007f2c49254efd syscall (libc.so.6)
                #1  0x00007f2c49c7b50e g_cond_wait_until (libglib-2.0.so.0)
                #2  0x00007f2c49c04fa1 n/a (libglib-2.0.so.0)
                #3  0x00007f2c49c5cdf2 n/a (libglib-2.0.so.0)
                #4  0x00007f2c49c5c2aa n/a (libglib-2.0.so.0)
                #5  0x00007f2c4932b58e start_thread (libpthread.so.0)
                #6  0x00007f2c4925a6a3 __clone (libc.so.6)
                
                Stack trace of thread 4389:
                #0  0x00007f2c4924f421 __poll (libc.so.6)
                #1  0x00007f2c49c333a6 n/a (libglib-2.0.so.0)
                #2  0x00007f2c49c334d0 g_main_context_iteration (libglib-2.0.so.0)
                #3  0x00007f2c3a2f3c7d n/a (libdconfsettings.so)
                #4  0x00007f2c49c5c2aa n/a (libglib-2.0.so.0)
                #5  0x00007f2c4932b58e start_thread (libpthread.so.0)
                #6  0x00007f2c4925a6a3 __clone (libc.so.6)
                
                Stack trace of thread 4388:
                #0  0x00007f2c4924f421 __poll (libc.so.6)
                #1  0x00007f2c49c333a6 n/a (libglib-2.0.so.0)
                #2  0x00007f2c49c33762 g_main_loop_run (libglib-2.0.so.0)
                #3  0x00007f2c49e3110a n/a (libgio-2.0.so.0)
                #4  0x00007f2c49c5c2aa n/a (libglib-2.0.so.0)
                #5  0x00007f2c4932b58e start_thread (libpthread.so.0)
                #6  0x00007f2c4925a6a3 __clone (libc.so.6)
                
                Stack trace of thread 4420:
                #0  0x00007f2c49254efd syscall (libc.so.6)
                #1  0x00007f2c49c7b50e g_cond_wait_until (libglib-2.0.so.0)
                #2  0x00007f2c49c04fa1 n/a (libglib-2.0.so.0)
                #3  0x00007f2c49c5cdf2 n/a (libglib-2.0.so.0)
                #4  0x00007f2c49c5c2aa n/a (libglib-2.0.so.0)
                #5  0x00007f2c4932b58e start_thread (libpthread.so.0)
                #6  0x00007f2c4925a6a3 __clone (libc.so.6)
Refusing to dump core to tty (use shell redirection or specify --output).