Zig upgrade requires deleting ~/.cache/zig/p before errors show up

[pfgithub]

Zig Version

0.15.0-dev.56+d0911786c (macOS aarch64)

Steps to Reproduce and Observed Behavior

git checkout https://github.com/pfgithub/blockeditor.git
cd blockeditor
zig-0.14.0-dev.3298+6fe1993d8 build
git checkout f68ed3af458fd45c2d4af67c30a6426db3e3f612
zig-0.15.0-dev.56+d0911786c build
# notice there are no errors
mv ~/.cache/zig/p ~/.cache/zig/p.bak
zig-0.15.0-dev.56+d0911786c build
# now fails:
/Users/pfg/.cache/zig/tmp/54eb34d549c9b850/tree-sitter-8ac115c727e5f23c3a3fe6846ef5bceb163ef44a/build.zig.zon:2:11: error: name must be a valid bare zig identifier (hint: switch from string to enum literal)
  .name = "tree-sitter",
          ^~~~~~~~~~~~~

Expected Behavior

It should either error or build successfully without touching ~/.cache/zig/p after upgrading.