Ugh, zipimport is virtually broken in 2.3a1 :-( It worked by accident in

the test set as it only tested with a zip archive in the current directory,
but it doesn't work at all for packages when the zip archive was specified
as an absolute path. It's a real embarrassing bug: a strchr call should
have been strrchr; fever apparently implies dyslexia.

Second stupid bug: the zipimport test failed with a name error
__importer__ (which I had renamed to __loader__ everywhere but here).
I would've sworn I ran the test after that change but that can't be true.
What I don't understand that noone reported a failing test_zipimport.py
before the release of 2.3a1.

Lib/test/test_zipimport.py

@@ -30,7 +30,8 @@ else:
 
 TESTMOD = "ziptestmodule"
 TESTPACK = "ziptestpackage"
-TEMP_ZIP = "junk95142.zip"
+TESTPACK2 = "ziptestpackage2"
+TEMP_ZIP = os.path.abspath("junk95142.zip")
 
 
 class UncompressedZipImportTestCase(ImportHooksBaseTestCase):
@@ -139,11 +140,11 @@ class UncompressedZipImportTestCase(ImportHooksBaseTestCase):
 
     def testDeepPackage(self):
         packdir = TESTPACK + os.sep
-        packdir2 = packdir + packdir
+        packdir2 = packdir + TESTPACK2 + os.sep
         files = {packdir + "__init__" + pyc_ext: (NOW, test_pyc),
                  packdir2 + "__init__" + pyc_ext: (NOW, test_pyc),
                  packdir2 + TESTMOD + pyc_ext: (NOW, test_pyc)}
-        self.doTest(pyc_ext, files, TESTPACK, TESTPACK, TESTMOD)
+        self.doTest(pyc_ext, files, TESTPACK, TESTPACK2, TESTMOD)
 
     def testGetData(self):
         z = ZipFile(TEMP_ZIP, "w")
@@ -163,7 +164,7 @@ class UncompressedZipImportTestCase(ImportHooksBaseTestCase):
         src = """if 1:  # indent hack
         def get_file():
             return __file__
-        if __importer__.get_data("some.data") != "some data":
+        if __loader__.get_data("some.data") != "some data":
             raise AssertionError, "bad data"\n"""
         pyc = make_pyc(compile(src, "<???>", "exec"), NOW)
         files = {TESTMOD + pyc_ext: (NOW, pyc),

Modules/zipimport.c

@@ -103,7 +103,7 @@ zipimporter_init(ZipImporter *self, PyObject *args, PyObject *kwds)
 			break;
 		}
 		/* back up one path element */
-		p = strchr(buf, SEP);
+		p = strrchr(buf, SEP);
 		if (prefix != NULL)
 			*prefix = SEP;
 		if (p == NULL)