Bug 300291 – [JSC] Improve error messages for invalid constructor of derived classes

• Status: RESOLVED
• Resolution: FIXED
• Component: JavaScriptCore

[Sosuke Suzuki]

Returning non object values from constructor of derived class is invalid:

      class Base {}
      class Derived extends Base {
          constructor() {
              super();
              return 123;
          }
      }
      new Derived();

    Current JSC throws a TypeError with the message "Cannot return a non-object
    type in the constructor of a derived class."

    This patch changes this error message to include the constructor name
    for debugging experience.

[Sosuke Suzuki]

Pull request: https://github.com/WebKit/WebKit/pull/51914

[EWS]

Committed 301258@main (e2c7e56a9516): <https://commits.webkit.org/301258@main>

Reviewed commits have been landed. Closing PR #51914 and removing active labels.

[Radar WebKit Bug Importer]

<rdar://problem/162267503>