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<p dir="auto">This is <a href="https://bugs.debian.org/922879" rel="nofollow noreferrer noopener" target="_blank">https://bugs.debian.org/922879</a> submitted by Rémi Denis-Courmont, I am as acting as proxy for Rémi:</p>
<p dir="auto">With GnuTLS 3.6.x, VLC pseudo-randomly fails to connect to HTTP/2
servers due to what seems like a race condition in GnuTLS.
See also <a href="https://trac.videolan.org/vlc/ticket/21951" rel="nofollow noreferrer noopener" target="_blank">https://trac.videolan.org/vlc/ticket/21951</a> .</p>
<p dir="auto">To reproduce, run VLC a dozen time or so (depending on the system),
until hitting a failure:</p>
<pre class="code highlight js-syntax-highlight plaintext" lang="plaintext" v-pre="true"><code><span id="LC1" class="line" lang="plaintext"># vlc -Irc https://streams.videolan.org/issues/21941/Greatest%20Motown%20Songs%2060s%2070s%20Hits.mp3</span>
<span id="LC2" class="line" lang="plaintext">(Ctrl+C to abort if it does not fail straight away)</span></code></pre>
<p dir="auto">The problem appears to be caused by the "fix" for Debian bug 849807 / <a href="https://gitlab.com/gnutls/gnutls/issues/158" data-original="#158" data-link="false" data-link-reference="false" data-project="179611" data-issue="3859404" data-reference-type="issue" data-container="body" data-placement="bottom" title="Deny sending before handshake is complete" class="gfm gfm-issue has-tooltip">#158</a>
which does not seem to follow the GnuTLS thread safety rules.</p>
<p dir="auto">Since breaking working applications seems far worse than protecting
broken applications from shooting themselves in the foot, I suggest
reverting 849807
(i.e. GnuTLS commit <a href="https://gitlab.com/gnutls/gnutls/commit/6a62ddfc416a4ec2118704f93c97fdd448d66566" data-original="6a62ddfc416a4ec2118704f93c97fdd448d66566" data-link="false" data-link-reference="false" data-project="179611" data-commit="6a62ddfc416a4ec2118704f93c97fdd448d66566" data-reference-type="commit" data-container="body" data-placement="bottom" title="Refuse to send data during handshake" class="gfm gfm-commit has-tooltip">6a62ddfc</a> ).</p>
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