Backport to 0.6

--HG--
branch : setuptools-0.6
extra : convert_revision : svn%3A6015fed2-1504-0410-9fe1-9d1591cc4771/sandbox/branches/setuptools-0.6%4076123

EasyInstall.txt

@@ -1221,6 +1221,9 @@ Release Notes/Change History
  * Fixed AttributeError under Python 2.3 when processing "HTTP authentication"
    URLs (i.e., ones with a ``user:password@host``).
 
+ * Fixed bogus AttributeError when no local or downloadable packages are
+   available
+
 0.6c11
  * Fix installed script .exe files not working with 64-bit Python on Windows
    (wasn't actually released in 0.6c10 due to a lost checkin)

setuptools/package_index.py

@@ -471,8 +471,9 @@ class PackageIndex(Environment):
                 (source and "a source distribution of " or ""),
                 requirement,
             )
-        self.info("Best match: %s", dist)
-        return dist.clone(location=self.download(dist.location, tmpdir))
+        else:
+            self.info("Best match: %s", dist)
+            return dist.clone(location=self.download(dist.location, tmpdir))
 
 
     def fetch(self, requirement, tmpdir, force_scan=False, source=False):
@@ -489,7 +490,6 @@ class PackageIndex(Environment):
         return None
 
 
-
     def gen_setup(self, filename, fragment, tmpdir):
         match = EGG_FRAGMENT.match(fragment)
         dists = match and [d for d in