[Webkit-unassigned] [Bug 229843] New: Math.hypot checks for infinite values prematurely

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Thu Sep 2 16:58:43 PDT 2021


            Bug ID: 229843
           Summary: Math.hypot checks for infinite values prematurely
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: richard.gibson at gmail.com

The algorithm for Math.hypot at https://tc39.es/ecma262/#sec-math.hypot requires coercing each argument to a Number before doing anything else. However, this coercion is incorrectly aborted after encountering an infinite value.

The following expression should throw an exception, but does not:
  Math.hypot({valueOf(){ return Infinity }}, {valueOf(){ throw new Error("arguments[1]") }})

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