8a875d354c
Using a bare pack name where a runtime value is required was silent garbage (f(xs)/return xs produced a stray pointer). Now a clear, context-tailored compile error: isPackName + diagPackAsValue, caught at lowerVarDecl (storage), lowerReturn (return), lowerFor (iterate), and an identifier-arm catch-all for call/other. Storage binds a placeholder so there is no cascade error. Suggestions point at WORKING fixes -- materialize (..xs), or declare the slice form ..xs: []P for runtime use. The plan category-B "spread ..xs" is broken (spreading a comptime pack into a []Any param crashes the LLVM verifier; filed issue 0053), so the diagnostics steer to the slice-of-protocol variadic instead. Repurposed examples/162-pack-bare-args.sx (was an aspirational bare-$args->[]Any auto-materialise, contradicting Decision 1) into the slice-form forward (..args: []Any). examples/203 is the four-category negative test. specs.md "Pack as value" updated. 238 examples + unit green.
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