[co19] Roll co19 to b80c9a4cb6fb22b5c8a7395d532c8e461fe33ab9

2023-12-19 sgrekhov22@gmail.com Fixes dart-lang/co19#2441. Fix roll failures (dart-lang/co19#2443)
2023-12-18 sgrekhov22@gmail.com Fixes dart-lang/co19#2435. Fix roll failures (dart-lang/co19#2437)
2023-12-18 sgrekhov22@gmail.com dart-lang/co19#2420. Add extension types exhaustiveness tests. Variables (dart-lang/co19#2431)
2023-12-15 sgrekhov22@gmail.com Fixes dart-lang/co19#2430. Update expected errors positions for CFE (dart-lang/co19#2433)
2023-12-15 sgrekhov22@gmail.com Fixes dart-lang/co19#2432. Remove excessive expected error for CFE (dart-lang/co19#2434)
2023-12-14 sgrekhov22@gmail.com dart-lang/co19#2420. Add extension types exhaustiveness tests. Maps (dart-lang/co19#2426)
2023-12-14 sgrekhov22@gmail.com dart-lang/co19#2420. Add extension types exhaustiveness tests. Lists (dart-lang/co19#2424)
2023-12-14 sgrekhov22@gmail.com dart-lang/co19#2139. Fix wrong failure of Language/Functions/element_type_A02_t06 (dart-lang/co19#2429)
2023-12-13 sgrekhov22@gmail.com dart-lang/co19#2350. Add more factory constructors tests (dart-lang/co19#2427)
2023-12-13 sgrekhov22@gmail.com Fixes dart-lang/co19#2415. Update `StreamController.broadcast()` test according to the changed documentation (dart-lang/co19#2425)
2023-12-13 sgrekhov22@gmail.com dart-lang/co19#2350. Add/update factory constructor tests. Part 4 (dart-lang/co19#2367)
2023-12-12 sgrekhov22@gmail.com dart-lang/co19#2420. Add extension types exhaustiveness tests. Enums, trivial cases (dart-lang/co19#2423)
2023-12-11 sgrekhov22@gmail.com dart-lang/co19#2420. Add extension types exhaustiveness tests. Enums (dart-lang/co19#2422)
2023-12-11 sgrekhov22@gmail.com dart-lang/co19#2386. Rename well-bounded tests. Update descriptions (dart-lang/co19#2405)
2023-12-08 sgrekhov22@gmail.com dart-lang/co19#2415. Change expectations for Stream.asyncMap() according to the current behavior (dart-lang/co19#2421)

Change-Id: I777eba4f1615c8477a5d2044f295696dfc210b1d
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/342582
Commit-Queue: Erik Ernst <eernst@google.com>
Reviewed-by: Alexander Thomas <athom@google.com>
Reviewed-by: Erik Ernst <eernst@google.com>

DEPS

@@ -55,7 +55,7 @@ vars = {
 
   # co19 is a cipd package automatically generated for each co19 commit.
   # Use tests/co19/update.sh to update this hash.
-  "co19_rev": "ea5e476b3af94f74f6996e4b4319bf03f9248c1c",
+  "co19_rev": "b80c9a4cb6fb22b5c8a7395d532c8e461fe33ab9",
 
   # The internal benchmarks to use. See go/dart-benchmarks-internal
   "benchmarks_internal_rev": "f048a4a853e3062056d39c3db100acdde42f16d6",