lib/test_runner.zig   | 35 ++++++-------
 src/AstGen.zig        | 13 +++++
 src/Sema.zig          | 86 +++++++++++++++++++++++---------
 src/Zir.zig           |  3 +-
 test/stack_traces.zig | 52 +++++++++++++++++++
 5 files changed, 147 insertions(+), 42 deletions(-)