bug#18851: 24.4; emacs cannot be started if the current directory has been removed

[Glenn Morris <rgm@gnu.org>]

Eli Zaretskii wrote:

> It doesn't segfault for me.  Can you show a backtrace?

Here you go (maybe it's more like 50% than 10%):

bt:

#0  0x00007ffff12e2c45 in __memcpy_ssse3_back () from /lib64/libc.so.6
#1  0x00007ffff69df80d in SmcSetProperties () from /lib64/libSM.so.6
#2  0x0000000000536f5b in smc_save_yourself_CB (smcConn=0xeae5b0, 
    clientData=0x0, saveType=1, shutdown=0, interactStyle=0, fast=0)
    at xsmfns.c:262
#3  0x00007ffff69e1c5d in _SmcProcessMessage () from /lib64/libSM.so.6
#4  0x00007ffff67d1b97 in IceProcessMessages () from /lib64/libICE.so.6
#5  0x00000000005367d5 in x_session_check_input (fd=11, data=0x0)
    at xsmfns.c:110
#6  0x00000000006374ab in wait_reading_process_output (time_limit=0, nsecs=0, 
    read_kbd=-1, do_display=true, wait_for_cell=..., wait_proc=0x0, 
    just_wait_proc=0) at process.c:5087
#7  0x000000000054e66b in kbd_buffer_get_event (kbp=0x7fffffff2fe8, 
    used_mouse_menu=0x7fffffff394f, end_time=0x0) at keyboard.c:3927
#8  0x000000000054ac3e in read_event_from_main_queue (end_time=0x0, 
    local_getcjmp=0x7fffffff3500, used_mouse_menu=0x7fffffff394f)
    at keyboard.c:2200
#9  0x000000000054aea3 in read_decoded_event_from_main_queue (end_time=0x0, 
    local_getcjmp=0x7fffffff3500, prev_event=..., 
    used_mouse_menu=0x7fffffff394f) at keyboard.c:2265
#10 0x000000000054c421 in read_char (commandflag=1, map=..., prev_event=..., 
    used_mouse_menu=0x7fffffff394f, end_time=0x0) at keyboard.c:2875
#11 0x0000000000558b68 in read_key_sequence (keybuf=0x7fffffff3b20, 
    bufsize=30, prompt=..., dont_downcase_last=false, 
    can_return_switch_frame=true, fix_current_buffer=true, 
    prevent_redisplay=false) at keyboard.c:9159
#12 0x0000000000548d11 in command_loop_1 () at keyboard.c:1407
#13 0x00000000005e229a in internal_condition_case (
    bfun=0x5488f2 <command_loop_1>, handlers=..., hfun=0x5480d7 <cmd_error>)
    at eval.c:1348
#14 0x00000000005485fa in command_loop_2 (ignore=...) at keyboard.c:1139
#15 0x00000000005e1a2d in internal_catch (tag=..., 
    func=0x5485d1 <command_loop_2>, arg=...) at eval.c:1108
#16 0x000000000054859a in command_loop () at keyboard.c:1118
#17 0x0000000000547cb2 in recursive_edit_1 () at keyboard.c:728
#18 0x0000000000547e3c in Frecursive_edit () at keyboard.c:799
#19 0x0000000000545c0f in main (argc=2, argv=0x7fffffff3fe8) at emacs.c:1626


bt full:

#0  0x00007ffff12e2c45 in __memcpy_ssse3_back () from /lib64/libc.so.6
No symbol table info available.
#1  0x00007ffff69df80d in SmcSetProperties () from /lib64/libSM.so.6
No symbol table info available.
#2  0x0000000000536f5b in smc_save_yourself_CB (smcConn=0xeae5b0, 
    clientData=0x0, saveType=1, shutdown=0, interactStyle=0, fast=0)
    at xsmfns.c:262
        props =           {0x7fffffff2830,
          0x7fffffff2850,
          0x7fffffff2870,
          0x7fffffff2890,
          0xeaf100}
        prop_ptr =           {{
            name = 0x14d52c0 "CloneCommand", 
            type = 0xd69190 "LISTofARRAY8", 
            num_vals = 1, 
            vals = 0x7fffffff26f0
          },
          {
            name = 0xe6ca50 "Program", 
            type = 0x11c4820 "ARRAY8", 
            num_vals = 1, 
            vals = 0x7fffffff2700
          },
          {
            name = 0xd537a0 "UserID", 
            type = 0xe6cf10 "ARRAY8", 
            num_vals = 1, 
            vals = 0x7fffffff2710
          },
          {
            name = 0xd55160 "RestartCommand", 
            type = 0xdb2390 "LISTofARRAY8", 
            num_vals = 5, 
            vals = 0xe7e640
          },
          {
            name = 0x7fffffff28c0 "\020$|\366\377\177", 
            type = 0x4860ff6efdd1c200 <Address 0x4860ff6efdd1c200 out of bounds>, 
            num_vals = -159636464, 
            vals = 0x7ffff7fc6000
          }}
        values =           {{
            length = 45, 
            value = 0xeaed30
          },
          {
            length = 5, 
            value = 0xe647c0
          },
          {
            length = 7, 
            value = 0xe61940
          },
          {
            length = 15820013, 
            value = 0x1
          },
          {
            length = 500000000, 
            value = 0x7ffff7de44c9 <check_match.9344+89>
          },
          {
            length = 0, 
            value = 0x7ffff67c16a8
          },
          {
            length = 10, 
            value = 0x5b
          },
          {
            length = -456570963, 
            value = 0x7ffff7de4ccb <do_lookup_x+1803>
          },
          {
            length = 499658979, 
            value = 0x7fffffff27b0
          },
          {
            length = -159640236, 
            value = 0x7ffff67c2410
          },
          {
            length = -55104, 
            value = 0x7fffffff28b0
          },
          {
            length = 45, 
            value = 0x5341d
          },
          {
            length = 0, 
            value = 0x0
          },
          {
            length = -134455296, 
            value = 0x406e31
          },
          {
            length = -159634424, 
            value = 0x403e10
          },
          {
            length = 0, 
            value = 0x10000008f
          },
          {
            length = 20813427, 
            value = 0x7fffffff2978
          },
          {
            length = -54960, 
            value = 0x1
          },
          {
            length = 16, 
            value = 0x7fffffff2910
          },
          {
            length = -55248, 
            value = 0x4860ff6efdd1c200
          }}
        vp = 0xe7e640
        val_idx = 3
        vp_idx = 4
        props_idx = 4
        i = 2
        smid_opt = 0xe0e010 "--smid=2d8bff4ea-7fc2-496f-bf2b-dd182557f83d"
        chdir_opt = 0x0
        user_login_name = {
          i = 18641748
        }
        cwd = 0x0
#3  0x00007ffff69e1c5d in _SmcProcessMessage () from /lib64/libSM.so.6
No symbol table info available.
#4  0x00007ffff67d1b97 in IceProcessMessages () from /lib64/libICE.so.6
No symbol table info available.
#5  0x00000000005367d5 in x_session_check_input (fd=11, data=0x0)
    at xsmfns.c:110
        ret = 11
#6  0x00000000006374ab in wait_reading_process_output (time_limit=0, nsecs=0, 
    read_kbd=-1, do_display=true, wait_for_cell=..., wait_proc=0x0, 
    just_wait_proc=0) at process.c:5087
        d = 0xc5cde8 <fd_callback_info+264>
        timeout_reduced_for_timers = true
        channel = 11
        nfds = 2
        Available = {
          fds_bits =             {3072,
            0 <repeats 15 times>}
        }
        Writeok = {
          fds_bits =             {0 <repeats 16 times>}
        }
        check_write = true
        check_delay = 0
        no_avail = false
        xerrno = 11
        proc = {
          i = 0
        }
        timeout = {
          tv_sec = 0, 
          tv_nsec = 0
        }
        end_time = {
          tv_sec = 0, 
          tv_nsec = 0
        }
        got_some_input = -1
        count = 2
#7  0x000000000054e66b in kbd_buffer_get_event (kbp=0x7fffffff2fe8, 
    used_mouse_menu=0x7fffffff394f, end_time=0x0) at keyboard.c:3927
        do_display = true
        obj = {
          i = 0
        }
#8  0x000000000054ac3e in read_event_from_main_queue (end_time=0x0, 
    local_getcjmp=0x7fffffff3500, used_mouse_menu=0x7fffffff394f)
    at keyboard.c:2200
        c = {
          i = 0
        }
        save_jump =           {{
            __jmpbuf =               {0,
              0,
              0,
              0,
              0,
              0,
              0,
              0}, 
            __mask_was_saved = 0, 
            __saved_mask = {
              __val =                 {0 <repeats 16 times>}
            }
          }}
        kb = 0x1dcd6500
#9  0x000000000054aea3 in read_decoded_event_from_main_queue (end_time=0x0, 
    local_getcjmp=0x7fffffff3500, prev_event=..., 
    used_mouse_menu=0x7fffffff394f) at keyboard.c:2265
        nextevt = {
          i = 13589501
        }
        frame = 0x7fffffff3260
        terminal = 0xcf5bfd
        events =           {{
            i = 13076624
          },
          {
            i = 0
          },
          {
            i = 0
          },
          {
            i = 140737488302560
          },
          {
            i = 5506081
          },
          {
            i = 499992607
          },
          {
            i = 140737488302624
          },
          {
            i = 5560959
          },
          {
            i = 13076624
          },
          {
            i = 4294967296
          },
          {
            i = 0
          },
          {
            i = 140737488302624
          },
          {
            i = 5506081
          },
          {
            i = 0
          },
          {
            i = 140737488302672
          },
          {
            i = 5587002
          }}
        n = 0
#10 0x000000000054c421 in read_char (commandflag=1, map=..., prev_event=..., 
    used_mouse_menu=0x7fffffff394f, end_time=0x0) at keyboard.c:2875
        c = {
          i = 0
        }
        jmpcount = 2
        local_getcjmp =           {{
            __jmpbuf =               {0,
              -601185235832345470,
              19028509,
              43008,
              0,
              0,
              -601185235687641982,
              601184789779639426}, 
            __mask_was_saved = 0, 
            __saved_mask = {
              __val =                 {140737488303456,
                5506081,
                0,
                140737488303744,
                5643396,
                0,
                0,
                43008,
                0,
                0,
                0,
                0,
                0,
                0,
                0,
                0}
            }
          }}
        save_jump =           {{
            __jmpbuf =               {17083104,
              18474576,
              0,
              13627136,
              20957107,
              17083104,
              13076624,
              0}, 
            __mask_was_saved = 5397952, 
            __saved_mask = {
              __val =                 {140737488303248,
                13076624,
                0,
                140737488303456,
                140737488303280,
                5506081,
                0,
                140737488303456,
                6187899,
                0,
                2,
                0,
                6601013,
                0,
                5506321,
                5397952}
            }
          }}
        tem = {
          i = 774368
        }
        save = {
          i = 0
        }
        previous_echo_area_message = {
          i = 0
        }
        also_record = {
          i = 0
        }
        reread = false
        gcpro1 = {
          next = 0xcfef45, 
          var = 0x7020, 
          nvars = 140737488303248
        }
        gcpro2 = {
          next = 0xc78890 <lispsym>, 
          var = 0xcfef40, 
          nvars = 140737488303072
        }
        polling_stopped_here = true
        orig_kboard = 0xea8ae0
#11 0x0000000000558b68 in read_key_sequence (keybuf=0x7fffffff3b20, 
    bufsize=30, prompt=..., dont_downcase_last=false, 
    can_return_switch_frame=true, fix_current_buffer=true, 
    prevent_redisplay=false) at keyboard.c:9159
        interrupted_kboard = 0xea8ae0
        interrupted_frame = 0x12d7830
        key = {
          i = 140737488304528
        }
        used_mouse_menu = false
        echo_local_start = 0
        last_real_key_start = 0
        keys_local_start = 0
        new_binding = {
          i = 1
        }
        count = 2
        t = 0
        echo_start = 0
        keys_start = 0
        current_binding = {
          i = 17376275
        }
        first_event = {
          i = 0
        }
        first_unbound = 31
        mock_input = 0
        fkey = {
          parent = {
            i = 17494291
          }, 
          map = {
            i = 17494291
          }, 
          start = 0, 
          end = 0
        }
        keytran = {
          parent = {
            i = 13581891
          }, 
          map = {
            i = 13581891
          }, 
          start = 0, 
          end = 0
        }
        indec = {
          parent = {
            i = 17494307
          }, 
          map = {
            i = 17494307
          }, 
          start = 0, 
          end = 0
        }
        shift_translated = false
        delayed_switch_frame = {
          i = 0
        }
        original_uppercase = {
          i = 140737488304704
        }
        original_uppercase_position = -1
        dummyflag = false
        starting_buffer = 0xcfef40
        fake_prefixed_keys = {
          i = 0
        }
        gcpro1 = {
          next = 0xc78890 <lispsym>, 
          var = 0x0, 
          nvars = 13674661
        }
#12 0x0000000000548d11 in command_loop_1 () at keyboard.c:1407
        cmd = {
          i = 140737488305248
        }
        keybuf =           {{
            i = 0
          },
          {
            i = 4274848
          },
          {
            i = 13076624
          },
          {
            i = 0
          },
          {
            i = 0
          },
          {
            i = 140737488304992
          },
          {
            i = 5506081
          },
          {
            i = 0
          },
          {
            i = 140737488305168
          },
          {
            i = 6187899
          },
          {
            i = 16935731
          },
          {
            i = 2
          },
          {
            i = 0
          },
          {
            i = 12914144
          },
          {
            i = 8350928
          },
          {
            i = 0
          },
          {
            i = 16935731
          },
          {
            i = 13104320
          },
          {
            i = 10674453
          },
          {
            i = 21807312
          },
          {
            i = 140737488305168
          },
          {
            i = 6186898
          },
          {
            i = 3
          },
          {
            i = 140737488305136
          },
          {
            i = 27696
          },
          {
            i = 27696
          },
          {
            i = 0
          },
          {
            i = 13104320
          },
          {
            i = 4274848
          },
          {
            i = 0
          }}
        i = 0
        prev_modiff = 0
        prev_buffer = 0x0
        already_adjusted = false
#13 0x00000000005e229a in internal_condition_case (
    bfun=0x5488f2 <command_loop_1>, handlers=..., hfun=0x5480d7 <cmd_error>)
    at eval.c:1348
        val = {
          i = 16935731
        }
        c = 0xe6b410
#14 0x00000000005485fa in command_loop_2 (ignore=...) at keyboard.c:1139
        val = {
          i = 15119072
        }
#15 0x00000000005e1a2d in internal_catch (tag=..., 
    func=0x5485d1 <command_loop_2>, arg=...) at eval.c:1108
        val = {
          i = 0
        }
        c = 0xe6b2e0
#16 0x000000000054859a in command_loop () at keyboard.c:1118
No locals.
#17 0x0000000000547cb2 in recursive_edit_1 () at keyboard.c:728
        count = 1
        val = {
          i = 140737488305600
        }
#18 0x0000000000547e3c in Frecursive_edit () at keyboard.c:799
        count = 0
        buffer = {
          i = 0
        }
#19 0x0000000000545c0f in main (argc=2, argv=0x7fffffff3fe8) at emacs.c:1626
        dummy = {
          i = 80
        }
        stack_bottom_variable = 0 '\000'
        do_initial_setlocale = true
        dumping = false
        skip_args = 0
        rlim = {
          rlim_cur = 33554432, 
          rlim_max = 18446744073709551615
        }
        no_loadup = false
        junk = 0x0
        dname_arg = 0x0
        ch_to_dir = 0x0
        original_pwd = 0x0
A debugging session is active.

	Inferior 1 [process 6488] will be killed.

Quit anyway? (y or n)