lib/std/fs/path.zig                                |  31 ++++-
 src/Compilation.zig                                |  83 ++++--------
 src/InternPool.zig                                 |   9 ++
 src/Sema.zig                                       |  20 ++-
 src/Zcu.zig                                        |  33 +++--
 src/Zcu/PerThread.zig                              | 233 ++++++++++++++++++++------------
 test/incremental/add_decl                          |   2 +-
 test/incremental/add_decl_namespaced               |   3 +-
 test/incremental/change_embed_file                 |  46 +++++++
 test/incremental/change_enum_tag_type              |   2 +-
 test/incremental/compile_error_then_log            |   7 +-
 test/incremental/delete_comptime_decls             |   7 +-
 test/incremental/fix_astgen_failure                |   4 +-
 test/incremental/fix_many_errors                   |  21 ++-
 test/incremental/remove_enum_field                 |   3 +-
 test/incremental/remove_invalid_union_backing_enum |   3 +-
 test/incremental/temporary_parse_error             |   2 +-
 test/incremental/unreferenced_error                |   2 +-
 tools/incr-check.zig                               | 164 ++++++++++++++++++----
 19 files changed, 467 insertions(+), 208 deletions(-)