Adding note segfaults app

[serpent7776]

Expected Behavior

Clicking a '+' button successfully adds a new note

Current Behavior

Clicking '+' button results in a segfault, killing the application. After restart note is added nonetheless.

Possible Solution

Fix the segfault.

Steps to Reproduce (for bugs)

1. Open the app
2. Click '+' to add a new note

Context

Thread 1 "notes-up" received signal SIGSEGV, Segmentation fault.
0x00007ffff32941fd in populate (getc=getc@entry=0x7ffff3291100 <__mkd_io_strget>, 
    ctx=ctx@entry=0x7fffffffc520, flags=flags@entry=0x43604000)
    at /usr/src/debug/discount/discount-3.0.0a/mkdio.c:105
Downloading source file /usr/src/debug/discount/discount-3.0.0a/mkdio.c
105         if ( flags && (is_flag_set(flags, MKD_NOHEADER) || is_flag_set(flags, MKD_STRICT)) )        
(gdb) bt
#0  0x00007ffff32941fd in populate
    (getc=getc@entry=0x7ffff3291100 <__mkd_io_strget>, ctx=ctx@entry=0x7fffffffc520, flags=flags@entry=0x43604000) at /usr/src/debug/discount/discount-3.0.0a/mkdio.c:105
#1  0x00007ffff32944b0 in mkd3_string
    (buf=buf@entry=0x555555a08c20 "", len=<optimized out>, flags=flags@entry=0x43604000)
    at /usr/src/debug/discount/discount-3.0.0a/mkdio.c:188
#2  0x0000555555589fe4 in enotes_viewer_process
    (self=self@entry=0x555555a823f0, raw_mk=raw_mk@entry=0x5555559373a0 "")
    at ../Notes-up-2.0.6/src/Widgets/Viewer.vala:230
#3  0x000055555558a5db in enotes_viewer_load_page
    (self=0x555555a823f0, page=0x55555572e8b0, force_load=<optimized out>)
    at ../Notes-up-2.0.6/src/Widgets/Viewer.vala:70
#4  0x000055555558a733 in __lambda36_ (self=0x555555a00d10)
    at ../Notes-up-2.0.6/src/Widgets/ViewEditStack.vala:99
#5  ___lambda36__g_object_notify (_sender=<optimized out>, pspec=<optimized out>, self=0x555555a00d10)
    at ../Notes-up-2.0.6/src/Widgets/ViewEditStack.vala:97
#6  0x00007ffff71546c0 in g_closure_invoke
    (closure=0x5555558b2640, return_value=0x0, n_param_values=2, param_values=0x7fffffffc840, invocation_hint=0x7fffffffc790) at ../glib/gobject/gclosure.c:832
#7  0x00007ffff7182a36 in signal_emit_unlocked_R.isra.0
    (node=node@entry=0x7fffffffc930, detail=detail@entry=113, instance=instance@entry=0x5555556031f0, emission_return=emission_return@entry=0x0, instance_and_params=instance_and_params@entry=0x7fffffffc840)
    at ../glib/gobject/gsignal.c:3980
#8  0x00007ffff7173a42 in signal_emit_valist_unlocked
    (instance=instance@entry=0x5555556031f0, signal_id=signal_id@entry=1, detail=detail@entry=113, var_args=var_args@entry=0x7fffffffca90) at ../glib/gobject/gsignal.c:3612
#9  0x00007ffff7173c77 in g_signal_emit_valist
    (instance=0x5555556031f0, signal_id=1, detail=113, var_args=var_args@entry=0x7fffffffca90)
--Type <RET> for more, q to quit, c to continue without paging--c
    at ../glib/gobject/gsignal.c:3355
#10 0x00007ffff7173d34 in g_signal_emit
    (instance=<optimized out>, signal_id=<optimized out>, detail=<optimized out>)
    at ../glib/gobject/gsignal.c:3675
#11 0x00007ffff715f636 in g_object_dispatch_properties_changed
    (object=0x5555556031f0, n_pspecs=<optimized out>, pspecs=<optimized out>)
    at ../glib/gobject/gobject.c:1427
#12 0x00007ffff7162ab3 in g_object_notify_by_spec_internal
    (pspec=<optimized out>, object=0x5555556031f0) at ../glib/gobject/gobject.c:1551
#13 g_object_notify_by_pspec (object=object@entry=0x5555556031f0, pspec=<optimized out>)
    at ../glib/gobject/gobject.c:1657
#14 0x000055555556beb8 in enotes_application_state_set_opened_page
    (value=0x55555572e8b0, self=0x5555556031f0) at ../Notes-up-2.0.6/src/Application.vala:150
#15 0x0000555555576f32 in enotes_application_state_open_page
    (self=0x5555556031f0, page_id=<optimized out>) at ../Notes-up-2.0.6/src/Application.vala:253
(gdb) i ar
getc = 0x7ffff3291100 <__mkd_io_strget>
ctx = 0x7fffffffc520
flags = 0x43604000
(gdb) i loc
line = {text = 0x0, size = 1432000400, alloc = 21845}
a = 0x55555572ec00
c = <optimized out>
pandoc = 0

(gdb) disas
Dump of assembler code for function populate:
   0x00007ffff32941c0 <+0>:	endbr64
   0x00007ffff32941c4 <+4>:	push   r15
   0x00007ffff32941c6 <+6>:	push   r14
   0x00007ffff32941c8 <+8>:	push   r13
   0x00007ffff32941ca <+10>:	push   r12
   0x00007ffff32941cc <+12>:	mov    r12,rsi
   0x00007ffff32941cf <+15>:	push   rbp
   0x00007ffff32941d0 <+16>:	mov    rbp,rdi
   0x00007ffff32941d3 <+19>:	push   rbx
   0x00007ffff32941d4 <+20>:	mov    rbx,rdx
   0x00007ffff32941d7 <+23>:	sub    rsp,0x38
   0x00007ffff32941db <+27>:	mov    rax,QWORD PTR fs:0x28
   0x00007ffff32941e4 <+36>:	mov    QWORD PTR [rsp+0x28],rax
   0x00007ffff32941e9 <+41>:	xor    eax,eax
   0x00007ffff32941eb <+43>:	call   QWORD PTR [rip+0xcc3f]        # 0x7ffff32a0e30
   0x00007ffff32941f1 <+49>:	mov    r13,rax
   0x00007ffff32941f4 <+52>:	test   rbx,rbx
   0x00007ffff32941f7 <+55>:	je     0x7ffff32943a0 <populate+480>
=> 0x00007ffff32941fd <+61>:	cmp    BYTE PTR [rbx+0x10],0x0
(gdb) i reg rbx
rbx            0x43604000          1130381312
(gdb) p flags
$1 = (mkd_flag_t *) 0x43604000
(gdb) ptype flags
type = struct {
    char bit[31];
} *
(gdb) x/s flags
0x43604000:	<error: Cannot access memory at address 0x43604000>

Looks like flags parameter is passed with incorrect value.

Screenshots of the Problem

N/A

Your Environment (for bugs)

Linux arc 5.10.194-1-MANJARO #1 SMP PREEMPT Sat Sep 2 20:55:57 UTC 2023 x86_64 GNU/Linux
Name : notes-up
Version : 2.0.6-2

• Notes-Up Version: 2.0.6-2
• OS Info: Manjaro