lib/std/debug.zig                                   |   4 +
 lib/std/debug/no_panic.zig                          |   5 +
 lib/std/debug/simple_panic.zig                      |   5 +
 src/Sema.zig                                        | 412 ++++++++++++++++++++++----------
 src/Zcu.zig                                         |   2 +
 test/behavior/ptrcast.zig                           | 156 ++++++++++++
 test/cases/compile_errors/slice_cast_change_len.zig |  57 +++++
 test/cases/safety/slice_cast_change_len_0.zig       |  26 ++
 test/cases/safety/slice_cast_change_len_1.zig       |  26 ++
 test/cases/safety/slice_cast_change_len_2.zig       |  26 ++
 test/incremental/change_panic_handler_explicit      |   4 +-
 11 files changed, 597 insertions(+), 126 deletions(-)