ea40724b61
Connect the E3.1 buffer to codegen. Push sites: `raise` (always escapes — push before cleanup) and `try`'s propagation branch (the failure that escapes to the caller). Clear sites: `catch` handler entry (via runCatchBody, error path only), the `or value` terminator's failure branch, and a destructure that binds a failable's error slot — so an absorbed failure leaves no residue. Helpers in lower.zig: emitTracePush / emitTraceClear (call getTraceFids, no-op when traces are off), tracesEnabled (opt_level == .none/.less — `sx run` defaults to -O0, so on in dev; .default/.aggressive are release → off, zero overhead), and placeholderTraceFrame (a nonzero u64 until DWARF/E3.0 supplies real PCs and E3.3 resolves them). Verified end-to-end via a #foreign sx_trace_len probe: catch/or/multi-slot- destructure drive len back to 0; release (--opt default) emits no push/clear at all (debug showed a residual where release showed 0). examples/241-error-trace-buffer.sx is a focused regression (white-box: reads sx_trace_len directly, pending E3.3's public trace.print_current). KNOWN GAP (documented, deferred to the E1.8 flow-check binding-site work): a single-binding capture of a PURE failable (`er := pure_failable()`, not a comma destructure) goes through lowerVarDecl, not lowerDestructureDecl, so it doesn't clear — the trace over-retains until the next absorbing site. Harmless today (nothing reads the buffer at function exit yet) but wrong per spec. Gates: zig build, zig build test, bash tests/run_examples.sh (278 passed; lone failure is the user's uncommitted 213-canonical-map pack WIP).
4 lines
56 B
Plaintext
4 lines
56 B
Plaintext
in catch: len=0
|
|
after catch: len=0
|
|
after success: len=0
|