Jonathan Kew authored Jan 14, 2026 and ma1 committed Mar 23, 2026

Bug 2009213 - Use local statics for harfbuzz callback pointers, to ensure thread-safe initialization. r=gfx-reviewers,lsalzman

Differential Revision: https://phabricator.services.mozilla.com/D278945

Paul Adenot authored Feb 12, 2026 and ma1 committed Mar 23, 2026

Bug 2014865 - Fix int64_t overflow in TimeUnit::FromSeconds boundary condition. r=media-playback-reviewers,alwu

TimeUnit::FromSeconds() had undefined behavior when converting values at the
boundary of int64_t representability. Specifically, when the input value times
the base equals exactly 2^63:

    static_cast<double>(INT64_MAX) rounds UP to 2^63 (INT64_MAX = 2^63-1 cannot be exactly represented as double)
    The check used strict >, so inBase == 2^63 passed the overflow check
    static_cast<int64_t>(std::round(2^63)) is undefined behavior since 2^63 exceeds INT64_MAX, producing INT64_MIN on x86-64
    This created invalid TimeUnits, causing assertion failures in TimeInterval construction (mStart <= mEnd)

The fix changes > to >= to properly catch this boundary case.

Differential Revision: https://phabricator.services.mozilla.com/D282394