GH-21006 approach 3 on 8.4 (staging)#134
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FETCH_OBJ_FUNC_ARG reading a SIMPLE_GET property hook pushed the getter call frame mid-trace and corrupted the call being built, crashing at the following SEND_FUNC_ARG. Compile it inline like FETCH_OBJ_R, clearing the SIMPLE_GET flag so the read takes read_property. Positional arguments resolve their by-ref-ness at compile time through the preceding CHECK_FUNC_ARG; named arguments get a run-time guard that deoptimizes to the interpreter when the argument is passed by reference. Fixes phpGH-21006
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Approach 3 for phpGH-21006 ported to PHP-8.4, staging only to run the full 8.4 CI matrix (FREEBSD_NTS, Alpine musl-ASAN, etc.). The patch applies cleanly to 8.4 and was validated locally on glibc (GLOBAL_REGS) and musl clang-ASAN (!GLOBAL_REGS): gh21006 passes, ext/opcache/tests/jit and Zend/tests/property_hooks clean, the FETCH stays JIT-compiled.