src/third_party/mozjs-45/js/src/jit-test/tests/debug/Frame-onStep-11.js

// Stepping out of a finally should not appear to
// step backward to some earlier statement.

var g = newGlobal();
g.eval(`function f() {
         debugger;              // +0
         var x = 0;             // +1
         try {                  // +2
           x = 1;               // +3
           throw 'something';   // +4
         } catch (e) {          // +5
           x = 2;               // +6
         } finally {            // +7
           x = 3;               // +8
         }                      // +9
         x = 4;                 // +10
       }`);                     // +11

var dbg = Debugger(g);

let foundLines = '';

dbg.onDebuggerStatement = function(frame) {
  let debugLine = frame.script.getOffsetLocation(frame.offset).lineNumber;
  frame.onStep = function() {
    // Only record a stop when the offset is an entry point.
    let foundLine = this.script.getOffsetLocation(this.offset).lineNumber;
    if (foundLine != debugLine && this.script.getLineOffsets(foundLine).indexOf(this.offset) >= 0) {
      foundLines += "," + (foundLine - debugLine);
    }
  };
};

g.f();

assertEq(foundLines, ",1,2,3,4,5,6,7,8,10");