[1187:1187:0517/050825.429687:ERROR:third_party/blink/renderer/modules/webgl/webgl2_rendering_context_base.cc:4286] [XFB-POC renderer] MapBufferRange ptr=0x6ebb6626b000 glError=0x0
[XFB-POC gpu-process] *** TransformFeedback::resume(): indexed buffer slot=0 id=1 isMapped()=true -- ValidateResumeTransformFeedback accepted a mapped XFB output buffer ***
[1187:1187:0517/050825.430185:ERROR:third_party/blink/renderer/modules/webgl/webgl2_rendering_context_base.cc:4295] [XFB-POC renderer] BindTF1 glError=0x0 ResumeTransformFeedback glError=0x0  <== VALIDATION GAP: resume accepted with mapped XFB output buffer
[1073:1073:0517/050825.435731:INFO:CONSOLE:10] "Setup complete; gl.getError()=0x0", source: http://127.0.0.1:8080/poc.html (10)
[1073:1073:0517/050825.435806:INFO:CONSOLE:10] "Triggering injected payload via pauseTransformFeedback() ...", source: http://127.0.0.1:8080/poc.html (10)
[1187:1187:0517/050825.450162:ERROR:third_party/blink/renderer/modules/webgl/webgl2_rendering_context_base.cc:4307] [XFB-POC renderer] DrawArrays(POINTS) with mapped XFB output glError=0x0
[1073:1073:0517/050825.450555:INFO:CONSOLE:10] "Done. Check stderr for [XFB-POC] log lines.", source: http://127.0.0.1:8080/poc.html (10)