bug#62560: 28.2; compile-mode misidentifies compiler output

[Tom Tromey]

Put the text between the "===" lines into a file, say /tmp/F.
Then M-x compile and for the compile command use "cat /tmp/F".

For me, the "| ... unsigned char :3" lines are partly highlighted as if
they are error messages, and next-error will erroneously try to select
these.

These lines occur because gcc prints some of the source code in the
error message.  I think Emacs should not treat them as if they explain
the location of an error.

================================================================
make[2]: Entering directory '/home/tromey/gdb/build/gdb'
  CXX    psymtab.o
../../binutils-gdb/gdb/psymtab.c: In function ‘void 
maintenance_check_psymtabs(const char*, int)’:
../../binutils-gdb/gdb/psymtab.c:1614:52: error: could not convert 
‘psym->partial_symbol::domain’ from ‘unsigned char:3’ to ‘domain_search_flags’ 
{aka ‘enum_flags<domain_search_flag>’}
 1614 |                                              psym->domain);
      |                                              ~~~~~~^~~~~~
      |                                                    |
      |                                                    unsigned char:3
../../binutils-gdb/gdb/psymtab.c:1629:52: error: could not convert 
‘psym->partial_symbol::domain’ from ‘unsigned char:3’ to ‘domain_search_flags’ 
{aka ‘enum_flags<domain_search_flag>’}
 1629 |                                              psym->domain);
      |                                              ~~~~~~^~~~~~
      |                                                    |
      |                                                    unsigned char:3
make[2]: *** [Makefile:1920: psymtab.o] Error 1
================================================================



In GNU Emacs 28.2 (build 1, x86_64-redhat-linux-gnu, GTK+ Version 3.24.35, 
cairo version 1.17.6)
 of 2023-01-28 built on buildvm-x86-25.iad2.fedoraproject.org
Windowing system distributor 'The X.Org Foundation', version 11.0.12201008
System Description: Fedora Linux 36 (Workstation Edition)

Configured using:
 'configure --build=x86_64-redhat-linux-gnu
 --host=x86_64-redhat-linux-gnu --program-prefix=
 --disable-dependency-tracking --prefix=/usr --exec-prefix=/usr
 --bindir=/usr/bin --sbindir=/usr/sbin --sysconfdir=/etc
 --datadir=/usr/share --includedir=/usr/include --libdir=/usr/lib64
 --libexecdir=/usr/libexec --localstatedir=/var
 --sharedstatedir=/var/lib --mandir=/usr/share/man
 --infodir=/usr/share/info --with-dbus --with-gif --with-jpeg --with-png
 --with-rsvg --with-tiff --with-xpm --with-x-toolkit=gtk3 --with-gpm=no
 --with-xwidgets --with-modules --with-harfbuzz --with-cairo --with-json
 --with-native-compilation build_alias=x86_64-redhat-linux-gnu
 host_alias=x86_64-redhat-linux-gnu CC=gcc 'CFLAGS=-DMAIL_USE_LOCKF -O2
 -flto=auto -ffat-lto-objects -fexceptions -g -grecord-gcc-switches
 -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2
 -Wp,-D_GLIBCXX_ASSERTIONS
 -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -fstack-protector-strong
 -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -m64 -mtune=generic
 -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection'
 LDFLAGS=-Wl,-z,relro
 PKG_CONFIG_PATH=:/usr/lib64/pkgconfig:/usr/share/pkgconfig'

Configured features:
ACL CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GSETTINGS HARFBUZZ JPEG JSON
LIBOTF LIBSELINUX LIBSYSTEMD LIBXML2 M17N_FLT MODULES NATIVE_COMP NOTIFY
INOTIFY PDUMPER PNG RSVG SECCOMP SOUND THREADS TIFF TOOLKIT_SCROLL_BARS
X11 XDBE XIM XPM XWIDGETS GTK3 ZLIB

Important settings:
  value of $LANG: en_US.UTF-8
  value of $XMODIFIERS: @im=ibus
  locale-coding-system: utf-8-unix

Major mode: Fundamental

Minor modes in effect:
  shell-dirtrack-mode: t
  which-function-mode: t
  erc-services-mode: t
  erc-networks-mode: t
  savehist-mode: t
  tooltip-mode: t
  global-eldoc-mode: t
  show-paren-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  column-number-mode: t
  line-number-mode: t
  indent-tabs-mode: t
  transient-mark-mode: t

Load-path shadows:
/home/tromey/.emacs.d/elpa/bubbles-0.5/bubbles hides 
/usr/share/emacs/28.2/lisp/play/bubbles
/home/tromey/.emacs.d/elpa/dictionary-1.10/dictionary hides 
/usr/share/emacs/28.2/lisp/net/dictionary

Features:
(shadow emacsbug modula2 smie python tramp-sh vc-annotate f90 cus-edit
cus-start asm-mode mailalias supercite regi mail-hist shr-color
mm-archive mule-util tcl dwarf-mode org-bullets org-element avl-tree
ol-eww eww xdg url-queue mm-url ol-rmail ol-mhe ol-irc ol-info ol-gnus
nnselect gnus-search eieio-opt speedbar ezimage dframe ol-docview
doc-view jka-compr image-mode exif ol-bibtex ol-bbdb ol-w3m ol-doi
org-link-doi org ob ob-tangle ob-ref ob-lob ob-table ob-exp org-macro
org-footnote org-src ob-comint org-pcomplete org-list org-faces
org-entities noutline outline org-version ob-emacs-lisp ob-core ob-eval
org-table oc-basic bibtex ol org-keys oc org-compat org-macs
org-loaddefs find-func term/xterm xterm pulse find-dired ffap gud
goto-addr log-edit dabbrev find-file copyright ggtags hippie-exp etags
fileloop generator xref project bug-reference smerge-mode diff cc-mode
cc-fonts cc-guess cc-menus cc-cmds log-view pcvs-util vc-mtn vc-hg
vc-git diff-mode vc-bzr vc-src vc-sccs vc-svn vc-cvs vc-rcs sort smiley
gnus-cite mail-extr gnus-async gnus-bcklg qp gnus-ml disp-table misearch
multi-isearch gnus-topic nndraft nnmh nnfolder utf-7 gnutls
network-stream nsm gnus-agent gnus-srvr gnus-score score-mode nnvirtual
gnus-msg gnus-art mm-uu mml2015 mm-view mml-smime smime dig nntp
gnus-cache gnus-sum shr kinsoku svg dom gnus-group gnus-undo smtpmail
sendmail gnus-start gnus-dbus dbus gnus-cloud nnimap nnmail mail-source
utf7 netrc nnoo gnus-spec gnus-int gnus-range message rmc puny dired
dired-loaddefs rfc822 mml mml-sec epa derived epg rfc6068 epg-config
mm-decode mm-bodies mm-encode mail-parse rfc2231 mailabbrev gmm-utils
mailheader gnus-win gnus nnheader gnus-util rmail rmail-loaddefs rfc2047
rfc2045 ietf-drums mail-utils mm-util mail-prsvr add-log flyspell ispell
diminish projectile ibuf-macs pcase edmacro kmacro grep compile
text-property-search ibuf-ext ibuffer ibuffer-loaddefs dash appt
diary-lib diary-loaddefs cal-menu calendar cal-loaddefs tramp
tramp-loaddefs trampver tramp-integration files-x tramp-compat shell
pcomplete parse-time ls-lisp which-func imenu minimap autorevert
filenotify cus-load erc-track erc-match erc-services erc-networks
erc-hl-nicks easy-mmode color erc-button erc-fill erc-stamp wid-edit
erc-goodies erc erc-backend iso8601 time-date thingatpt pp format-spec
erc-loaddefs comp comp-cstr rx cl-extra help-mode warnings advice vc-dir
ewoc vc vc-dispatcher cc-styles cc-align cc-engine cc-vars cc-defs
ange-ftp comint ansi-color ring server savehist clang-rename
clang-include-fixer let-alist clang-format xml finder-inf
gdb-shell-autoloads lisppaste-autoloads pydoc-info-autoloads info-look
info cl weblogger-autoloads package browse-url url url-proxy url-privacy
url-expand url-methods url-history url-cookie url-domsuf url-util
mailcap url-handlers url-parse auth-source cl-seq eieio eieio-core
cl-macs eieio-loaddefs password-cache json subr-x map url-vars seq
byte-opt gv bytecomp byte-compile cconv cl-loaddefs cl-lib iso-transl
tooltip eldoc paren electric uniquify ediff-hook vc-hooks
lisp-float-type elisp-mode mwheel term/x-win x-win term/common-win x-dnd
tool-bar dnd fontset image regexp-opt fringe tabulated-list replace
newcomment text-mode lisp-mode prog-mode register page tab-bar menu-bar
rfn-eshadow isearch easymenu timer select scroll-bar mouse jit-lock
font-lock syntax font-core term/tty-colors frame minibuffer cl-generic
cham georgian utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao
korean japanese eucjp-ms cp51932 hebrew greek romanian slovak czech
european ethiopic indian cyrillic chinese composite emoji-zwj charscript
charprop case-table epa-hook jka-cmpr-hook help simple abbrev obarray
cl-preloaded nadvice button loaddefs faces cus-face macroexp files
window text-properties overlay sha1 md5 base64 format env code-pages
mule custom widget hashtable-print-readable backquote threads
xwidget-internal dbusbind inotify dynamic-setting system-font-setting
font-render-setting cairo move-toolbar gtk x-toolkit x multi-tty
make-network-process native-compile emacs)

Memory information:
((conses 16 1714013 158817)
 (symbols 48 57899 16)
 (strings 32 168379 19915)
 (string-bytes 1 7108390)
 (vectors 16 98085)
 (vector-slots 8 2538401 323345)
 (floats 8 506 567)
 (intervals 56 201434 1380)
 (buffers 992 316))