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Bug? Opera-Chromium Crashes on Click Extension Button in --single-process Mode

  • UserAgent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.87 Safari/537.36 OPR/54.0.2952.64

    Chrome version: 67.0.3396.87 Channel: stable
    OS Version: 4.15.0-29-generic #31-Ubuntu SMP x86_64 x86_64 x86_64 GNU/Linux
    Flash Version: not installed

    Steps to reproduce the problem:

    1. Install the Opera extension "Install Chrome Extensions" https://addons.opera.com/en/extensions/details/install-chrome-extensions/
    2. Install some Chrome and Opera extensions.
    3. Launch Opera-Chromium browser with --single-process
    4. After a few minutes of browsing on multiple tabs, click an extension button.

    What is the expected behavior?
    Extension popup will open.

    What went wrong?
    Opera-Chromium crashes

    Crashed report ID in about://crashes: Not available in Opera-Chromium

    How much crashed? Whole browser

    Did this work before? No

    no probs if remove --single-process switch

    Reported to Google here:
    https://bugs.chromium.org/p/chromium/issues/detail?id=871431