229508 2021-08-25 11:50:28 -0700 Link program fails if shader contains 0.0/0.0 2021-08-30 11:13:10 -0700 1 1 1 Unclassified WebKit WebGL Safari Technology Preview Unspecified Unspecified RESOLVED DUPLICATE 229439 https://bugs.webkit.org/show_bug.cgi?id=229439 P2 Normal --- 1 cxiaoji webkit-unassigned dino kbr kkinnunen kpiddington oldest_to_newest 1787240 0 cxiaoji 2021-08-25 11:50:28 -0700 Version: Safari 15.0 (Webkit 16612.1.26.1.5) Minimal sample to reproduce: - Open https://codepen.io/Pessimistress/pen/dyRPjOd, link program fails with message "Internal error compiling shader with Metal backend.\nPlease submit this shader, or website as a bug to https://bugs.webkit.org" - Change `0.0 / 0.0` to `1.0 / 0.0`, renders successfully - Either fails in Firefox or Chrome According to https://www.khronos.org/registry/OpenGL/specs/es/3.0/GLSL_ES_Specification_3.00.pdf, section 5.9: "Dividing by zero does not cause an exception but does result in an unspecified value." 1787268 1 kbr 2021-08-25 13:17:56 -0700 This is probably a duplicate of Bug 229439, in which infinities / NaNs are being fixed. 1788581 2 kkinnunen 2021-08-30 11:13:10 -0700 Thanks for the report! I think this is now fixed. *** This bug has been marked as a duplicate of bug 229439 ***