# HG changeset patch
# User Paul Boddie <paul@boddie.org.uk>
# Date 1484260179 -3600
# Node ID 0e7b5712a29b9cca0a174504d85179dce735cae3
# Parent  b46f0224a6c49ee74f8d820696f157f31da65286
Raise an exception when a module is not found.

diff -r b46f0224a6c4 -r 0e7b5712a29b importer.py
--- a/importer.py	Thu Jan 12 21:38:38 2017 +0100
+++ b/importer.py	Thu Jan 12 23:29:39 2017 +0100
@@ -973,12 +973,10 @@
             path_so_far.append(p)
             module_name = ".".join(path_so_far)
 
-            # Return None if the module could not be located.
+            # Raise an exception if the module could not be located.
 
             if not m:
-                if self.verbose:
-                    print >>sys.stderr, "Not found (%s)" % name
-                return None
+                raise ProgramError("Module not found: %s" % name)
 
             # Get the directory and module filename.