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bug#29348: 26.0.50; shr.el heisenbug
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From: |
Devon Sean McCullough |
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Subject: |
bug#29348: 26.0.50; shr.el heisenbug |
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Date: |
Sun, 19 Nov 2017 23:18:02 -0500 |
Downgrade from heisenbug to reproducible:
$ cd /tmp
$ cat > glFlush.xml <<\.
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"xhtml1-transitional.dtd">
<!-- saved from url=(0013)about:internet -->
<?xml-stylesheet type="text/xsl" href="mathml.xsl"?><html
xmlns="http://www.w3.org/1999/xhtml";
xmlns:pref="http://www.w3.org/2002/Math/preference";
pref:renderer="mathplayer-dl"><head><meta http-equiv="Content-Type"
content="text/html; charset=UTF-8" /><title>glFlush</title><meta
name="generator" content="DocBook XSL Stylesheets V1.78.1" /></head><body><div
class="refentry"><a id="glFlush"></a><div class="titlepage"></div><div
class="refnamediv"><h2>Name</h2><p>glFlush — force execution of GL commands in
finite time</p></div><div class="refsynopsisdiv"><h2>C Specification</h2><div
class="funcsynopsis"><table border="0" class="funcprototype-table"
summary="Function synopsis" style="cellspacing: 0; cellpadding:
0;"><tr><td><code class="funcdef">void <strong
class="fsfunc">glFlush</strong>(</code></td><td> <var
class="pdparam">void</var><code>)</code>;</td></tr></table><div
class="funcprototype-spacer"> </div></div></div><div class="refsect1"><a
id="description"></a><h2>Description</h2><p>
Different GL implementations buffer commands in several different
locations,
including network buffers and the graphics accelerator itself.
<code class="function">glFlush</code> empties all of these buffers,
causing all issued commands to be executed as quickly as
they are accepted by the actual rendering engine.
Though this execution may not be completed in any particular
time period,
it does complete in finite time.
</p><p>
Because any GL program might be executed over a network,
or on an accelerator that buffers commands,
all programs should call <code class="function">glFlush</code>
whenever they count on having
all of their previously issued commands completed.
For example,
call <code class="function">glFlush</code> before waiting for user
input that depends on
the generated image.
</p></div><div class="refsect1"><a id="notes"></a><h2>Notes</h2><p>
<code class="function">glFlush</code> can return at any time.
It does not wait until the execution of all previously
issued GL commands is complete.
</p></div><div class="refsect1"><a id="seealso"></a><h2>See Also</h2><p>
<a class="citerefentry" href="glFinish.xml"><span
class="citerefentry"><span class="refentrytitle">glFinish</span></span></a>
</p></div><div class="refsect1"><a
id="copyright"></a><h2>Copyright</h2><p>
Copyright <span class="trademark"></span>© 1991-2006
Silicon Graphics, Inc. This document is licensed under the SGI
Free Software B License. For details, see
<a class="ulink" href="http://oss.sgi.com/projects/FreeB/";
target="_top">http://oss.sgi.com/projects/FreeB/</a>.
</p></div></div></body></html>
.
$ Open -n -a Emacs --args -Q --chdir /tmp --eval '(let ((f "glFlush.xml"))
(find-file f) (bury-buffer) (display-buffer f) (with-current-buffer f
(shr-render-region (point-min) (point-max)) (not-modified)))'