On Sat, Dec 10, 2011 at 03:23:10AM +0100, David Ne??as wrote: > Date: Sat, 10 Dec 2011 03:23:10 +0100 > From: David Ne??as <y...@physics.muni.cz> > Subject: Re: Why cani i initialize "prefix" with a default string? > To: Gary Kline <kl...@thought.org> > Cc: GTK Devel List <gtk-app-devel-list@gnome.org> > > On Fri, Dec 09, 2011 at 05:40:09PM -0800, Gary Kline wrote: > > guys, i am appending a piece of gtk test code. it saves the > > internal filename buffer for "espeak -f %s ifbuf" to run > > on--to be the user's voice. if i set > > > > static char *prefix = "talk"; > > > > then back up and enter another string in the box at the > > bottom, strange things happen. Anybody know where i am > > messing up? > > Strange things most likely occur after attempting to free the const > string in entry_changed_cb() > > g_free(prefix); > > which was fine if prefix was NULL initially. You can use -Wwrite-strings > to catch that.
your advice was right on target. i changed the gcc line, then checked if (prefix == NULL) printf("NOT NULL\n") early in main(). since i set prefix , the string printed to stdout. long-story-short, my test program works the way i want. > Unforutnately, passing constant strings as various > user-data-kind arguments or to g_hash_table_insets() then produces > warnings too. okay; i'll watch out! > > Also learn to use valgrind; it would show you this problem immediately. > a couple hours ago i installed valgrind and a front end. The next thing on my to-try list is to get the increase/decrease buttons together; this means reading up on the hbox stuff. i found one example somewhere last week and it looks tricky. --anyhow, thans for your keen insights. gary > Yeti > -- Gary Kline kl...@thought.org http://www.thought.org Public Service Unix Journey Toward the Dawn, E-Book: http://www.thought.org The 8.57a release of Jottings: http://jottings.thought.org Twenty-five years of service to the Unix community. _______________________________________________ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list