<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_RESOLVED bz_closed" title="RESOLVED INVALID - Wrong and unstable image rendering from GLSL fragment shaders" href="https://bugs.freedesktop.org/show_bug.cgi?id=99919#c10">Comment # 10</a> on <a class="bz_bug_link bz_status_RESOLVED bz_closed" title="RESOLVED INVALID - Wrong and unstable image rendering from GLSL fragment shaders" href="https://bugs.freedesktop.org/show_bug.cgi?id=99919">bug 99919</a> from <a class="email" href="mailto:h.evrard@imperial.ac.uk" title="Hugues Evrard <h.evrard@imperial.ac.uk>"> Hugues Evrard</a> <pre>(In reply to Matt Turner from <a href="show_bug.cgi?id=99919#c9">comment #9</a>) > > [...], and the same change to variant.frag "fixes" its output to match > original.frag. Thanks for the analysis indeed! This bug report comes from experiments on fuzzing shaders to chase bugs in graphics drivers. Unfortunately here the original shader that we fuzzed exposes undefined behavior in opU() as explained by Roland, we didn't spot that earlier. I'll try to confirm the fix suggested by Matt on our setup, but I'm currently travelling so it may take a few days.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> <li>You are the assignee for the bug.</li> </ul> </body> </html>