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bug#28455: 26.0.50; first M-x next-error is very slow

From: Tom Tromey
Subject: bug#28455: 26.0.50; first M-x next-error is very slow
Date: Wed, 13 Sep 2017 20:24:49 -0600

I ran `make' using M-x compile.
A number of errors appeared.

The very first M-x next-error took a long time -- 8 seconds by my

This seems to happen the first time after each compilation.
However if I C-u M-x next-error to restart from the beginning, then that
is fast.


In GNU Emacs 26.0.50 (build 18, x86_64-pc-linux-gnu, GTK+ Version 3.22.17)
 of 2017-09-09 built on bapiya
Repository revision: 4131f9785e30f2a31745125c714e922892113c62
Windowing system distributor 'Fedora Project', version 11.0.11903000
System Description:     Fedora release 25 (Twenty Five)

Recent messages:
syntax: ((statement 4143)), indent: 4
syntax: ((statement 4143) (comment-intro)), indent: 4 [7 times]
syntax: ((statement 4750)), indent: 8
C-x C-g is undefined
Saving file /home/tromey/gcc/gcc/libcpp/macro.c...
Wrote /home/tromey/gcc/gcc/libcpp/macro.c
Saving file /home/tromey/gcc/gcc/libcpp/macro.c...
Wrote /home/tromey/gcc/gcc/libcpp/macro.c
Mark set
Compilation exited abnormally with code 2

Configured using:
 'configure --prefix=/home/tromey/Emacs/install'

Configured features:

Important settings:
  value of $LANG: en_US.utf8
  value of $XMODIFIERS: @im=ibus
  locale-coding-system: utf-8-unix

Major mode: C/*l

Minor modes in effect:
  shell-dirtrack-mode: t
  bug-reference-prog-mode: t
  diff-auto-refine-mode: t
  flyspell-mode: t
  which-function-mode: t
  erc-services-mode: t
  erc-list-mode: t
  erc-menu-mode: t
  erc-autojoin-mode: t
  erc-ring-mode: t
  erc-networks-mode: t
  erc-pcomplete-mode: t
  erc-track-mode: t
  erc-match-mode: t
  erc-netsplit-mode: t
  erc-hl-nicks-mode: t
  erc-button-mode: t
  erc-fill-mode: t
  erc-stamp-mode: t
  erc-irccontrols-mode: t
  erc-noncommands-mode: t
  erc-move-to-prompt-mode: t
  erc-readonly-mode: t
  savehist-mode: t
  tooltip-mode: t
  global-eldoc-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
  auto-fill-function: tromey-c++-do-auto-fill
  transient-mark-mode: t
  abbrev-mode: t

Load-path shadows:
/home/tromey/.emacs.d/elpa/bubbles-0.5/bubbles hides 

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url-methods url-history url-cookie url-domsuf flow-fill mailalias sort
gnus-cite smiley shr-color url-util shr svg xml dom browse-url
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mwheel term/x-win x-win term/common-win x-dnd tool-bar dnd fontset image
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backquote dbusbind inotify dynamic-setting system-font-setting
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make-network-process emacs)

Memory information:
((conses 16 1575072 1145977)
 (symbols 48 56689 1)
 (miscs 40 9756 5605)
 (strings 32 514129 71833)
 (string-bytes 1 14329693)
 (vectors 16 245436)
 (vector-slots 8 3800354 117054)
 (floats 8 465 633)
 (intervals 56 67864 3194)
 (buffers 992 148))

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