[blacktrs]

Goal

Run the full symfony/demo application — Symfony 8.1, Doctrine ORM 3.6, Twig, Symfony UX, security, 30 locales — as one native binary, rendering what php renders.

Result

From a single long-lived process, every page with a php reference is byte-identical to php 8.5 (render timestamps and the port aside):

Page	Status
/	200, identical
/en/blog/, /en/blog/page/2, /uk/blog/	200, identical (incl. the "Show code" modal)
/en/blog/posts/{slug}	200, identical (Doctrine lazy entities, comment counts)
/en/blog/rss.xml	200, identical
/en/login	200, identical
/en/admin/post/	302 to login, identical
missing asset / unknown route	404 page, identical
/en/blog/search	200 natively; php fails on that page under the comparison harness, so no reference

examples/symfony-demo/ holds only the overlay (entry, kernel, manifest, warm-up scripts, compat shims) and a setup.sh that fetches upstream at a pinned commit. Its README explains the requirements, the build-time php steps and why they exist, the run-time environment, and what differs from upstream.

What changed in the compiler and runtime

New capabilities

• Lazy ghosts: ReflectionClass::newLazyGhost, initializeLazyObject, markLazyObjectAsInitialized, isUninitializedLazyObject, setRawValueWithoutLazyInitialization. The initializer runs on the first read, write, isset or ?? of an unset slot. Candidate classes are listed by the new manifest key lazy (documented in docs/modules.md); only those pay for the check.
• Dom\HTMLDocument::createFromString — a tokenizer and tree builder for ordinary markup (html-sanitizer).
• debug_backtrace provides each method frame's object (DEBUG_BACKTRACE_* constants added).
• Each backtrace frame (and Throwable::getTrace/getFile) names its own call site's file in a multi-file build; frames called from built-in code leave file/line out, as php does.
• ReflectionMethod::getEndLine (the parser records the closing line).
• http_build_query walks objects by their public properties; fopen reports its failure to the installed error handler.

Correctness and memory fixes (each with a test or a promoted repro)

• A static local's initial array was allocated in the frame arena and overwritten by the next call's temporaries.
• A shared virtual dispatcher was reused by a site writing more arguments, which lost its array argument.
• A callable returned from a cell property was released without a count (crashed the second request); a callable compared unequal to its own cell.
• A generator did not own a bare-array parameter; a yielding foreach over an erased base walked arrays only.
• $o->$name, get_object_vars and is_iterable/is_countable now follow php's visibility and Traversable/Countable rules.
• The HTTP server presents itself as the front controller /index.php (Symfony derived its base URL from ./bin/app).
• Plus the earlier work on this branch: private-property shadowing, date (de)serialization, enums, unions, references to typed properties, Twig context cycles, and more (see the commit list).

Fixes #566, fixes #569, fixes #576, fixes #587. New issues filed along the way: #588, #589, #593, #594.

Verification done

• New and touched AOT cases pass, as do the -k subsets for every area touched (generators, foreach, callables, closures, dispatch, reflection, lazy, traces, fibers, exceptions, io, http, dom, static, arena).
• tests/aot/xfail.sh: no XPASS left (the one that appeared was promoted).
• setup.sh run from scratch on an overlay-only copy reproduces the warmed caches.
• macOS arm64 only.

Still owed before merge

• Full AOT suite and the Linux gate (tools/docker/run_tests.sh --gate): the changes touch ownership, generators, dispatch and the backtrace runtime.
• Known leak: a raw array callable held in a closure-typed local is never released.