macro-stepper: better internal debugging

original commit: cb62eeffb6cacf0a8488176804fe722544bb5e73

collects/macro-debugger/model/reductions-engine.rkt

@@ -150,7 +150,7 @@
                       (current-state-with v (with-syntax1 ([p f]) fs)))]
              [type-var type])
          (DEBUG
-          (printf "visibility = ~s\n" (visibility))
+          (printf "visibility = ~s\n" (if (visibility) 'VISIBLE 'HIDDEN))
           (printf "step: s1 = ~s\n" s)
           (printf "step: s2 = ~s\n\n" s2))
          (let ([ws2
@@ -324,7 +324,7 @@
          (visibility-off (not previous-pass-hides?)
                          v
                          (lambda ()
-                           (print-viable-subterms v)
+                           (when #f (print-viable-subterms v))
                            (R** f v p s ws clause ... => k))
                          #t))]
 
@@ -495,6 +495,9 @@
 (define (seek-point stx vstx k)
   (if (visibility)
       (k vstx)
+      (begin
+        (DEBUG (printf "Seek point\n")
+               (print-viable-subterms stx))
         (let ([paths (table-get (subterms-table) stx)])
           (cond [(null? paths)
                  (DEBUG (printf "seek-point: failed on ~.s\n" (stx->datum stx)))
@@ -514,7 +517,7 @@
                              (lambda (ws exn)
                                (RSfail ws exn)))))]
                 [else
-               (raise (make nonlinearity stx paths))]))))
+                 (raise (make nonlinearity stx paths))])))))
 
 (provide print-viable-subterms)
 (define (print-viable-subterms stx)

collects/macro-debugger/model/steps.rkt

@@ -112,7 +112,8 @@
           rename-case-lambda
           rename-let-values
           rename-letrec-values
-          rename-lsv)))
+          rename-lsv
+          track-origin)))
 
 (define (rewrite-step? x)
   (and (step? x) (not (rename-step? x))))