Description: Finally block in sync generator in try-finally statement is ignored and is not executed if that generator yields rejected promise and is iterated over with for-await-of loop.

void async function() {
	try {
		for await (const x of function*() {
			try { yield Promise.reject("reject") }
			finally { console.log("finally after reject") }
		}()) {
			console.log(await x)
		}
	} catch (e) {
		console.log(e)
	}
}()

eshost Output:

$ eshost -s -x 'void async function() {
	try {
		for await (const x of function*() {
			try { yield Promise.reject("reject") }
			finally { console.log("finally after reject") }
		}()) {
			console.log(await x)
		}
	} catch (e) {
		console.log(e)
	}
}()'
#### sm, v8
reject

I expect the following output:

finally after reject
reject

If the generator is async then finally block is executed as expected.

If for-await-of loop is transpiled with babel then finally block is executed as expected.

There is a comment about that bug and spec compliance in firefox: https://bugzilla.mozilla.org/show_bug.cgi?id=1610315#c1

Update.
This bug causes the next two code fragments to behave differently:
1.

   for (const _x of function*() {
      try { yield Promise.reject("reject") }
      finally { console.log("finally after reject") }
   }()){
      const x = await _x
      ....
   }

   for await (const x of function*() {
      try { yield Promise.reject("reject") }
      finally { console.log("finally after reject") }
   }()){
      ...
   }

The first loop executes finally block, but the second one doesn't, though both of them resolves promises before assigning them to x.