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* Preserve explicit AST column locations through code generation Assisted-by: OpenAI Codex:model version unavailable * Remove obsolete location bindings after span migration Assisted-by: OpenAI Codex:model version unavailable * Propagate inconsistent AST span provenance without panicking Assisted-by: OpenAI Codex:model version unavailable * Preserve mapped positions when exporting optimized Pass nodes Assisted-by: OpenAI Codex:model version unavailable * Consolidate AST location regressions and satisfy strict compiler lints Assisted-by: OpenAI Codex:model version unavailable * Consolidate equivalent AST literal location cases Replace the six-way literal-only optimizer matrix with one optimized-AST round-trip, preserving all assertions. Keep the distinct normalized-range identity, explicit Pass provenance, and synthetic format-spec regressions. Validation: all four appended location cases passed using the verified final-f6a RustPython binary with unchanged native sources. Ran normal pre-commit hooks; no Cargo build or full cyclic snippet suite. Assisted-by: OpenAI Codex:model version unavailable * Reuse Ruff source locations in AST conversion Replace redundant PySourceLocation, Row, and Column wrappers with the compiler-core re-export of Ruff SourceLocation. Use UTF-8 byte coordinates and retain the empty-source fallback. Share the normalized range conversion while preserving caller validation and signed semantic metadata. Validation so far: independent source and boundary review, rustfmt, and git diff --check. Runtime validation follows after the shared build target is released. Assisted-by: OpenAI Codex:model version unavailable * Preserve the first AST preprocessing location error Share first-error recording between generated-node allocation and synthetic-pass coordinate overflow. Exercise both real compiler-state failure paths in both orders using one MAX_ID location entry. Validation: focused compiler-state regression, strict codegen all-target Clippy, unchanged full-source seals, rustfmt, and normal pre-commit hooks. No interpreter runtime or broad suite rerun for this error-only change. Assisted-by: OpenAI Codex:model version unavailable