Diagnosis was unblocked by temporarily installing
babel-plugin-react-compiler and reading its logger events, which the
Rust port swallows. Every failure in Home comes from the compiler, not
from this repository's code: 24 errors under the stable 1.0.0, all
prefixed Todo: (the compiler's own marker for unimplemented syntax) --
13 for try/finally, 9 for throw inside try/catch, 2 for a
non-reorderable MemberExpression. All 13 finally blocks do real cleanup
(clearing a timeout, releasing in-flight guards, resetting loading
flags), so deleting them to please the compiler would trade correctness
for speculative memoization.
Two paths are now closed by measurement rather than assumption. Newer
compiler builds fix the try/finally gap but Home then hits two
consecutive internal Invariant panics, which are compiler bugs. And
project-wide the version makes no difference at all: across 373 files
both versions compile exactly 134 functions, with the same 21 files
failing, so switching implementations buys nothing.
The diagnostic dependency is therefore removed and the lockfile
restored via npm ci. Deliverable is unchanged: config still rolled
back, frontend/src untouched.
Co-authored-by: Cursor <cursoragent@cursor.com>
Jesse_Chen
89d37b6506