Re: gpsmon segmentation fault

[Gary E. Miller]

Yo SZIGETVÁRI!

On Thu, 9 Apr 2020 12:54:26 +0200
SZIGETVÁRI János <address@hidden> wrote:

> copyright info ==9937== Command: /usr/bin/gpsmon
> ==9937==
> ESC[?1049hESC[22;0;0tESC[1;24rESC(BESC[mESC[4lESC[?7hESC[?1hESC===9937==
> Invalid write of size 4
> ==9937==    at 0x145D4: refresh_statwin (gpsmon.c:442)
> ==9937==    by 0x149E7: curses_init (gpsmon.c:490)
> ==9937==    by 0x176D7: main (gpsmon.c:1379)
> ==9937==  Address 0x4bcfaf0 is 24 bytes before a block of size 16 in
> arena "client"
    (void)wattrset(statwin, A_BOLD);

Perfect.  That narrows it down a lot.  Your line numbnbers do not
exactly match gpsmon.c in git head.  But close enough.  The segfault
happens very early in the initialization of the screen.

Here is the failing line:

    (void)wattrset(statwin, A_BOLD);

But that is boilerplate code, right out of the man page.

Starting to look like either a strange ncurses error, or a bad
libncurses.

Or, maybe a threading issue.  To test the thread hypothesis, comment
out this line in gpsmon.c, rebuild and test:

            pps_thread_activate(&session.pps_thread);

RGDS
GARY
---------------------------------------------------------------------------
Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
        address@hidden  Tel:+1 541 382 8588

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