make some additional comments re: off-by-one error errors

src/parser.janet

@@ -357,6 +357,11 @@
  {:type :synthetic :data [;terms] :token origin})
 
 # collections
+### XXX: the current panic/capture structure in this, script, etc. is blowing up when the LAST element (line, tuple member, etc.) has an error
+# it does, however, work perfectly well when there isn't one
+# there's something about advancing past the breaking token, or not
+# aslo, I removed the captures here around nonbinding and separators, and we got into a loop with a panic
+# oy
 (defn- tup [parser]
  (def origin (current parser))
  (advance parser) # consume the :lparen
@@ -1140,7 +1145,7 @@
 (do
 # (comment
 (def source `
-(,,,,,1, 2 bar, foo)
+(,,,,,1, 2, foo)
 
 `)
 (def scanned (s/scan source))