Re: [gmime-devel] Porting from GMime 2.6 to GMime 3

[Jeffrey Stedfast <fejj gnome org>]

Hi,

So I *think* the problem is that you haven't called g_mime_init() which 
initializes the default GMimeParserOptions.

Jeff

On 4/26/2019 12:45 PM, Detlef Graef wrote:
> Hi,
>
> I'm trying to build the newsreader Pan
> (https://gitlab.gnome.org/GNOME/pan) with GMime 3.
>
> A segfault occurs when calling the follwing function:
>
> messages[i] = g_mime_parser_construct_message(parser, NULL);
>
> Whith GMime 2.6 the calls looks as follows:
>
> messages[i] = g_mime_parser_construct_message(parser);
>
> Backtrace from gdb:
>
> Thread 1 "pan" received signal SIGSEGV, Segmentation fault.
> 0x00007ffff745ff99 in g_mime_parser_options_clone () from
> /usr/lib/x86_64-linux-gnu/libgmime-3.0.so.0
> (gdb) ba
> #0  0x00007ffff745ff99 in g_mime_parser_options_clone () at
> /usr/lib/x86_64-linux-gnu/libgmime-3.0.so.0
> #1  0x00007ffff7451755 in g_mime_header_list_new () at
> /usr/lib/x86_64-linux-gnu/libgmime-3.0.so.0
> #2  0x00007ffff7457ac6 in  () at /usr/lib/x86_64-linux-gnu/libgmime-3.0.so.0
> #3  0x00007ffff770108c in g_type_create_instance () at
> /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
> #4  0x00007ffff76e3528 in  () at
> /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
> #5  0x00007ffff76e4ca5 in g_object_new_with_properties () at
> /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
> #6  0x00007ffff76e5711 in g_object_new () at
> /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
> #7  0x00007ffff7453b3d in g_mime_message_new () at
> /usr/lib/x86_64-linux-gnu/libgmime-3.0.so.0
> #8  0x00007ffff745fa45 in g_mime_parser_construct_message () at
> /usr/lib/x86_64-linux-gnu/libgmime-3.0.so.0
> #9  0x00005555556bf7dd in pan::mime::construct_message(_GMimeStream**,
> int, pan::GPGDecErr&) (istreams=<optimized out>, qty=1, err=...)
>      at mime-utils.cc:1201
> ...
>
>
> I've had a similar issue (segfault) with the function
> g_mime_utils_header_decode_text()
>
> First I had (a segfault occured):
> char * decoded (g_mime_utils_header_decode_text (NULL, s.c_str()));
>
> Then I created GMimeParserOptions with default settings like this (then
> it works):
>
> GMimeParserOptions *gmpo  = g_mime_parser_options_new();
> char * decoded (g_mime_utils_header_decode_text (gmpo, s.c_str()));
> g_mime_parser_options_free (gmpo);
>
>
> Passing GMimeParserOptions with default settings to
> g_mime_parser_construct_message() doesn't solve the segfault.
>
> The segfault occurs trying to open any news article.
>
> Used version of GMime lib (from
> /usr/include/gmime-3.0/gmime/gmime-version.h):
>
> #define GMIME_MAJOR_VERSION (3U)
> #define GMIME_MINOR_VERSION (2U)
> #define GMIME_MICRO_VERSION (1U)
>
> libgmime-3.0-dev    3.2.1-1 (Debian package version)
>
> gcc version: gcc version 8.3.0 (Debian 8.3.0-6)
>
>
> Any advice is appreciated. Thanks.
>
>
> Best regards,
>
> Detlef
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