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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - Framebuffer considered invalid when a draw call is done before glCheckFramebufferStatus"
href="https://bugs.freedesktop.org/show_bug.cgi?id=94148#c5">Comment # 5</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - Framebuffer considered invalid when a draw call is done before glCheckFramebufferStatus"
href="https://bugs.freedesktop.org/show_bug.cgi?id=94148">bug 94148</a>
from <span class="vcard"><a class="email" href="mailto:imirkin@alum.mit.edu" title="Ilia Mirkin <imirkin@alum.mit.edu>"> <span class="fn">Ilia Mirkin</span></a>
</span></b>
<pre>(In reply to Corentin Wallez from <a href="show_bug.cgi?id=94148#c4">comment #4</a>)
<span class="quote">> I believe I stumbled on the same bug when running the WebGL CTS on Mesa
> 11.2's core 3.3 context. The specific failing case is
> <a href="https://www.khronos.org/registry/webgl/sdk/tests/conformance/extensions/oes">https://www.khronos.org/registry/webgl/sdk/tests/conformance/extensions/oes</a>-
> texture-half-float.html that is flaky about 2/3 of the time. A standalone
> repro case is available here:
> <a href="https://github.com/Kangz/GLDriverBugs/blob/master/fbo_completness_caching/">https://github.com/Kangz/GLDriverBugs/blob/master/fbo_completness_caching/</a>
> Main.cpp</span >
I can confirm that this happens with the repro on mesa mainline with i965/SKL,
but not any st/mesa-based drivers. The error I get is
User error: GL_INVALID_FRAMEBUFFER_OPERATION in glReadPixels(incomplete
framebuffer)</pre>
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