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For those not following the github discussion: I'm pretty sure I've
nailed the bug down.<br>
<br>
I have reproduced the bug in a simple test project and intend to
raise an issue with Espressif on this.<br>
<br>
<a class="moz-txt-link-freetext" href="https://github.com/openvehicles/Open-Vehicle-Monitoring-System-3/issues/189#issuecomment-457965435">https://github.com/openvehicles/Open-Vehicle-Monitoring-System-3/issues/189#issuecomment-457965435</a><br>
<br>
If you'd like to test this on your module, configure the project to
your wifi credentials, then use "make flash". As the test project is
small, this normally will not erase your OVMS config partition, but
a backup is always recommended.<br>
<br>
Regards,<br>
Michael<br>
<br>
<br>
<div class="moz-cite-prefix">Am 24.01.19 um 21:19 schrieb Michael
Balzer:<br>
</div>
<blockquote type="cite"
cite="mid:e4159a1c-b283-25b0-f1b5-ce570b529a1c@expeedo.de">
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Everyone please have a look at…<br>
<br>
<a class="moz-txt-link-freetext"
href="https://github.com/openvehicles/Open-Vehicle-Monitoring-System-3/issues/189#issuecomment-457334248"
moz-do-not-send="true">https://github.com/openvehicles/Open-Vehicle-Monitoring-System-3/issues/189#issuecomment-457334248</a><br>
<br>
Please try to reproduce the bug on your modules.<br>
<br>
I'm open for explanations.<br>
<br>
I thought this might be some copy-on-write bug with std::string,
but the gcc 5.x libstdc++ does no longer use that implementation
(wouldn't be C++11 compliant as well). I also tried moving all
strings to temporary buffers, but modes 5 & 6 eliminated this
explanation as well.<br>
<br>
My remaining theories:<br>
<ul>
<li>A task writing out of bounds (but only 0-bytes?)</li>
<li>A hardware issue only affecting some modules<br>
</li>
</ul>
A hardware issue only affecting some percentage of ESP32 could
explain this as well as the strange heap corruptions that seem to
affect some modules especially often.<br>
<br>
Regards,<br>
Michael<br>
<br>
<pre class="moz-signature" cols="160">--
Michael Balzer * Helkenberger Weg 9 * D-58256 Ennepetal
Fon 02333 / 833 5735 * Handy 0176 / 206 989 26
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<pre class="moz-signature" cols="160">--
Michael Balzer * Helkenberger Weg 9 * D-58256 Ennepetal
Fon 02333 / 833 5735 * Handy 0176 / 206 989 26
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