lib/std/debug.zig                                          |  4 ++
 lib/std/debug/no_panic.zig                                 |  5 +++
 lib/std/debug/simple_panic.zig                             |  4 ++
 src/Sema.zig                                               | 63 +++++++++++++++++++++++++++++++-
 src/Zcu.zig                                                |  4 ++
 test/cases/compile_errors/initialize_empty_union.zig       | 31 ----------------
 test/cases/safety/load_uninstantiable_enum.zig             | 20 ++++++++++
 test/cases/safety/load_uninstantiable_enum_from_slice.zig  | 21 +++++++++++
 test/cases/safety/load_uninstantiable_union.zig            | 23 ++++++++++++
 test/cases/safety/load_uninstantiable_union_from_slice.zig | 24 ++++++++++++
 test/incremental/change_panic_handler_explicit             |  3 ++
 11 files changed, 169 insertions(+), 33 deletions(-)