Thanks for your reply, Eli. > First, please file a bug about this via "M-x report-emacs-bug RET". > When? :) (after the crash, the process is gone, so can't M-x anything; before the crash, there's nothing interesting to report :)) In case it's interesting, appended the info from r-e-b (from an emacs -Q instance) to the bottom of this email. > Second, please show the value of it->current in frame #7 (inside > next_overlay_string). > (gdb) p it->current $3 = { pos = { charpos = 1295, bytepos = 1295 }, overlay_string_index = 0, string_pos = { charpos = -1, bytepos = -1 }, dpvec_index = -1 } > Third, could you please try the latest development code, and possibly > compile without optimizations? Will do & report back in a few days (or sooner, if the bug recurs in HEAD). Cheers, -a In GNU Emacs 24.2.1 (x86_64-unknown-linux-gnu, X toolkit, Xaw scroll bars) of 2012-09-11 on Windowing system distributor `The X.Org Foundation', version 11.0.70000000 Configured using: `configure '--prefix=/usr/gmacs-24.2' '--mandir=${prefix}/share/man' '--infodir=${prefix}/share/info' '--with-x-toolkit=lucid' '--with-xpm' '--with-jpeg' '--with-tiff' '--with-gif' '--with-png' '--with-x' '--program-transform-name=s/emacs/gmacs/g' '--without-dbug' '--without-gconf' 'CC=clang -B/home/fischman/src/chromium/src/third_party/gold/' 'CFLAGS=-Wall -g -O2' 'LDFLAGS=-Wl,-Bsymbolic-functions -Wl,-z,relro' 'CPPFLAGS=-D_FORTIFY_SOURCE=2'' Important settings: value of $LC_ALL: value of $LC_COLLATE: nil value of $LC_CTYPE: nil value of $LC_MESSAGES: nil value of $LC_MONETARY: nil value of $LC_NUMERIC: nil value of $LC_TIME: nil value of $LANG: en_US.UTF-8 value of $XMODIFIERS: nil locale-coding-system: utf-8-unix default enable-multibyte-characters: t Major mode: Lisp Interaction Minor modes in effect: tooltip-mode: t mouse-wheel-mode: t tool-bar-mode: t menu-bar-mode: t file-name-shadow-mode: t global-font-lock-mode: t font-lock-mode: t blink-cursor-mode: t auto-composition-mode: t auto-encryption-mode: t auto-compression-mode: t line-number-mode: t transient-mark-mode: t Recent input: M-x r e p o r Recent messages: For information about GNU Emacs and the GNU system, type C-h C-a. Load-path shadows: None found. Features: (shadow sort gnus-util mail-extr emacsbug message format-spec rfc822 mml easymenu mml-sec mm-decode mm-bodies mm-encode mail-parse rfc2231 mailabbrev gmm-utils mailheader sendmail regexp-opt rfc2047 rfc2045 ietf-drums mm-util mail-prsvr mail-utils time-date tooltip ediff-hook vc-hooks lisp-float-type mwheel x-win x-dnd tool-bar dnd fontset image fringe lisp-mode register page menu-bar rfn-eshadow timer select scroll-bar mouse jit-lock font-lock syntax facemenu font-core frame cham georgian utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao korean japanese hebrew greek romanian slovak czech european ethiopic indian cyrillic chinese case-table epa-hook jka-cmpr-hook help simple abbrev minibuffer loaddefs button faces cus-face files text-properties overlay sha1 md5 base64 format env code-pages mule custom widget hashtable-print-readable backquote make-network-process dbusbind dynamic-setting system-font-setting font-render-setting x-toolkit x multi-tty emacs)