[GNC] Regular crashes on Linux Mint when assigning payment

[John Ralls]

Interesting. The segfault in gtk_widget_show has nothing whatever to do with the stack trace, which is deep in the midst of saving your file. In the stack trace (which I’ve extracted below to show the proximate cause) the XML backend is trying to create a new text session with the value “string” and the memory allocator encounters a corrupted chunk in its accounting. The most likely cause of that would be something writing to memory that doesn’t belong to it. The gtk_widget_show segfault is a read, so it’s not to blame.

Do you have auto-save enabled and might it have fired while you were in the middle of assigning the payment? And to make sure I’m looking at the right place, this is assign as payment from a transaction in the register, right?

Regards,
John Ralls

> On Oct 11, 2025, at 08:09, James Thorpe <James at fusionsystems.co.za> wrote:
> 
> Thread 1 "gnucash" received signal SIGSEGV, Segmentation fault.
> 0x00007ffff7712f33 in gtk_widget_show (widget=0x5555560b01f0) at ../gtk/gtkwidget.c:4834
> 4834      g_return_if_fail (GTK_IS_WIDGET (widget));
> 
> Here is the stack trace - I hope it means something to someone 
> 
> --- BEGIN STACK TRACE ------------------------------------------------------------
> 
> #5  0x00007041794a5765 in malloc_printerr (str=str at entry=0x7041795b9fd3 "corrupted size vs. prev_size") at malloc.c:5772
> --Type <RET> for more, q to quit, c to continue without paging--c
> #6  0x00007041794a6126 in unlink_chunk (p=p at entry=0x56046304e600, av=0x7041795f1ac0 <main_arena>) at malloc.c:1611
>         fd = <optimized out>
>         bk = <optimized out>
> #7  0x00007041794a915a in _int_malloc (av=av at entry=0x7041795f1ac0 <main_arena>, bytes=bytes at entry=120) at malloc.c:4381
>         p = <optimized out>
>         iters = <optimized out>
>         nb = <optimized out>
>         idx = <optimized out>
>         bin = <optimized out>
>         victim = 0x56046304e600
>         size = 1104
>         victim_index = <optimized out>
>         remainder = <optimized out>
>         remainder_size = 976
>         block = <optimized out>
>         bit = <optimized out>
>         map = <optimized out>
>         fwd = <optimized out>
>         bck = <optimized out>
>         tcache_unsorted_count = <optimized out>
>         tcache_nb = <optimized out>
>         tc_idx = 6
>         return_cached = <optimized out>
> #8  0x00007041794a9db4 in __GI___libc_malloc (bytes=120) at malloc.c:3336
>         ar_ptr = 0x7041795f1ac0 <main_arena>
>         victim = <optimized out>
>         tbytes = <optimized out>
>         tc_idx = <optimized out>
> #9  0x00007041792a7d4c in xmlNewText (content=content at entry=0x70417859e64c "string") at ../tree.c:2303
>         cur = <optimized out>
>