feat(regex): preserve executable callback pseudo-block scope - #978
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Transfer callback local() frames to matcher ownership so committed paths keep their dynamic values while backtracking, failure, and exceptions unwind them. Treat callback implementation CVs as pseudo-blocks for caller, __SUB__, and escaping loop control, and keep named-unary scalar matches in scalar context. Update the Phase 36 plans with the 33/49 reg_eval_scope.t baseline and the remaining lexical pragma, recursive caller, and diagnostic work. Generated with [Codex](https://openai.com/codex) Co-Authored-By: Codex <codex@openai.com>
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Summary
local()frames to matcher ownership for forward continuation and backtracking unwindcaller,__SUB__, and escaping control flow on JVM and interpreter backendsscalarprecedence so a following match remains in scalar contextValidation
make— PASS (BUILD SUCCESSFUL in 3m 59s)make check-links— PASS (0 errors)re/rxcode.t— 42/42re/reg_eval_scope.t— 33/49 on JVM and interpreter (previously 22/49)The remaining 16
reg_eval_scope.tfailures are recorded in the plan: runtime/interpolated callback source and lexicalreflags, recursive callback caller/source lines, interpolatedqr//self identity, warning location, and the legacy escaped-callback diagnostic.