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CONSOLE MESSAGE: line 15: Unsafe JavaScript attempt to initiate navigation for frame with URL 'about:blank' from frame with URL 'http://localhost:8800/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_helper-3.html'. The frame attempting navigation is sandboxed, and is therefore disallowed from navigating its ancestors.
CONSOLE MESSAGE: line 15: SecurityError (DOM Exception 18): The operation is insecure.
Harness Error (TIMEOUT), message = null
TIMEOUT Check that popups from a sandboxed iframe escape the sandbox if
allow-popups-to-escape-sandbox is used Test timed out