[2116:2116:0517/051217.639563:ERROR:third_party/blink/renderer/modules/webgl/webgl2_rendering_context_base.cc:4286] [XFB-POC renderer] MapBufferRange ptr=0x7484826b1000 glError=0x0
[2054:2054:0517/051217.640496:ERROR:gpu/command_buffer/service/gl_utils.cc:426] [.WebGL-0x778d1e7eaf80] GL_INVALID_OPERATION: glResumeTransformFeedback: An active buffer is mapped.
[2116:2116:0517/051217.640999:ERROR:third_party/blink/renderer/modules/webgl/webgl2_rendering_context_base.cc:4295] [XFB-POC renderer] BindTF1 glError=0x0 ResumeTransformFeedback glError=0x502
[2116:2116:0517/051217.672440:ERROR:third_party/blink/renderer/modules/webgl/webgl2_rendering_context_base.cc:4307] [XFB-POC renderer] DrawArrays(POINTS) with mapped XFB output glError=0x0
[2022:2022:0517/051217.675691:INFO:CONSOLE:10] "Setup complete; gl.getError()=0x0", source: http://127.0.0.1:8080/poc.html (10)
[2022:2022:0517/051217.675805:INFO:CONSOLE:10] "Triggering injected payload via pauseTransformFeedback() ...", source: http://127.0.0.1:8080/poc.html (10)
[2022:2022:0517/051217.681541:INFO:CONSOLE:10] "Done. Check stderr for [XFB-POC] log lines.", source: http://127.0.0.1:8080/poc.html (10)
[2022:2022:0517/051217.696317:INFO:CONSOLE:72] "[.WebGL-0x778d1e7eaf80] GL_INVALID_OPERATION: glResumeTransformFeedback: An active buffer is mapped.", source: http://127.0.0.1:8080/poc.html (72)