Bug 229508 - Link program fails if shader contains 0.0/0.0
Summary: Link program fails if shader contains 0.0/0.0
Status: RESOLVED DUPLICATE of bug 229439
Alias: None
Product: WebKit
Classification: Unclassified
Component: WebGL (show other bugs)
Version: Safari Technology Preview
Hardware: Unspecified Unspecified
: P2 Normal
Assignee: Nobody
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2021-08-25 11:50 PDT by Pessimistress
Modified: 2021-08-30 11:13 PDT (History)
4 users (show)

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Description Pessimistress 2021-08-25 11:50:28 PDT 
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."
Comment 1 Kenneth Russell 2021-08-25 13:17:56 PDT 
This is probably a duplicate of Bug 229439, in which infinities / NaNs are being fixed.
Comment 2 Kimmo Kinnunen 2021-08-30 11:13:10 PDT 
Thanks for the report! I think this is now fixed.

*** This bug has been marked as a duplicate of bug 229439 ***