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// Setting a breakpoint in a generator function works, and we can
// traverse the stack and evaluate expressions in the context of older
// generator frames.
var g = newGlobal({newCompartment: true});
var dbg = Debugger(g);
dbg.onDebuggerStatement = function (frame) {
function hit(frame) {
frame.older.eval("q += 16");
}
var s = frame.script;
var offs = s.getLineOffsets(g.line0 + 9);
for (var i = 0; i < offs.length; i++)
s.setBreakpoint(offs[i], {hit: hit});
};
g.eval("line0 = Error().lineNumber;\n" +
"function* g(x) {\n" + // + 1
" var q = 10;\n" + // + 2
" yield* x;\n" + // + 3
" return q;\n" + // + 4
"}\n" + // + 5
"function* range(n) {\n" + // + 6
" debugger;\n" + // + 7
" for (var i = 0; i < n; i++)\n" + // + 8
" yield i;\n" + // + 9 <-- breakpoint
" return;\n" + // so that line 9 only has the yield
"}");
g.eval("var iter = g(range(2))");
g.eval("var first = iter.next().value");
g.eval("var second = iter.next().value");
g.eval("var third = iter.next().value");
assertEq(g.first, 0);
assertEq(g.second, 1);
assertEq(g.third, 42);
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