Function saveExcursion

modules/script/_bootstrap/debugger.js:229–237

(fn)

function saveExcursion(fn) {
    const tf = topFrame, ff = focusedFrame;
    try {
        return fn();
    } finally {
        topFrame = tf;
        focusedFrame = ff;
    }
}

// Evaluate @expr in the current frame, logging and suppressing any exceptions
function evalInFrame(expr) {