[Webkit-unassigned] [Bug 258730] New: Prevent counter values from over/underflowing

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=258730

            Bug ID: 258730
           Summary: Prevent counter values from over/underflowing
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: CSS
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: ahmad.saleem792 at gmail.com
                CC: ntim at apple.com, vitor.roriz at apple.com

Hi Team,

While going through Blink's commits, I came across where we fail over/underflowing Layout Test on WebKit ToT:

Blink Commit: https://chromium.googlesource.com/chromium/src.git/+/e18ac62b00618f26ef125554dd8241b2aed711e9

WebKit ToT Result:

FAIL large reset does not overflow assert_array_equals: expected property 4 to be 2000000000 but got -1794967296 (expected array [500000000, 1000000000, 1500000000, 2000000000, 2000000000] got [500000000, 1000000000, 1500000000, 2000000000, -1794967296])
FAIL small reset does not underflow assert_array_equals: expected property 4 to be -2000000000 but got 1794967296 (expected array [-500000000, -1000000000, -1500000000, -2000000000, -2000000000] got [-500000000, -1000000000, -1500000000, -2000000000, 1794967296])

Just wanted to raise this bug so we can fix it.

Since Vitor and Tim were doing counter-* related fix, so tagging them.

Thanks!

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