X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~mdw/git/sod/blobdiff_plain/5d7e65b98fa4e766cef5259a0470d6d7555e77a0..60529354d9cf7b479605366b103517af44927e02:/src/final.lisp

diff --git a/src/final.lisp b/src/final.lisp
index 96d82df..8cd42f8 100644
--- a/src/final.lisp
+++ b/src/final.lisp
@@ -39,17 +39,21 @@ (export '*debugout-pathname*)
 (defvar *debugout-pathname* #p"debugout.c")
 
 (export 'test-module)
-(defun test-module (path &key reason)
+(defun test-module (path &key reason clear backtrace)
   "Read a module from PATH, to exercise the machinery.
 
+   If CLEAR is non-nil, then reset the translator's state before proceeding.
+
    If REASON is non-nil, then output the module to `*debugout-pathname*' with
    that REASON.
 
    Return a two-element list (NERROR NWARNING) of the number of errors and
    warnings encountered while processing the module."
+  (when clear (clear-the-decks))
   (multiple-value-bind (module nerror nwarning)
-      (count-and-report-errors () (read-module path))
-    (when reason
+      (if backtrace (read-module path)
+	  (count-and-report-errors () (read-module path)))
+    (when (and module reason)
       (with-open-file (out *debugout-pathname*
 		       :direction :output
 		       :if-exists :supersede