KarpelesLab / goro / 26391006057

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vm: lower expr-context Foo::$bar = v natively + relax slot-unsafe gate

Apply the same B-flag pattern used for OP_OBJECT_SET to OP_STATIC_PROP_SET:
when B != 0, push the assigned value back on the stack after the write
so $x = (Foo::$bar = v) gets the value on the stack.

emitAssign's IsStaticPropertyTarget branch drops the e.stmtCtx
restriction and dispatches expr-context through OP_STATIC_PROP_SET B=1.

dispatch.go IsSlotSafe: 'runClassStaticVarRef' as a write target is now
slot-safe for plain '=' (the AST runner's WriteValue resolves the class
via ctx.Global().GetClass, not via caller locals). Compound (+=, .=)
and inc/dec still AST-delegate.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

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