__file__ used to be always set to the .pyc (or .pyo) file, even if

gvanrossum · gvanrossum · commit afd3daedded4 · 1998-08-25T18:44:34.000Z
that file in fact did not exist or at least was not used.  Change this
so that __file__ is *only* set to the .pyc/.pyo file when it actually
read the code object from it; otherwise __file__ is set to the .py
file.
diff --git a/Python/import.c b/Python/import.c
@@ -706,6 +706,7 @@ load_source_module(name, pathname, fp)
 		if (Py_VerboseFlag)
 			fprintf(stderr, "import %s # precompiled from %s\n",
 				name, cpathname);
+		pathname = cpathname;
 	}
 	else {
 		co = parse_source_module(pathname, fp);
@@ -716,7 +717,7 @@ load_source_module(name, pathname, fp)
 				name, pathname);
 		write_compiled_module(co, cpathname, mtime);
 	}
-	m = PyImport_ExecCodeModuleEx(name, (PyObject *)co, cpathname);
+	m = PyImport_ExecCodeModuleEx(name, (PyObject *)co, pathname);
 	Py_DECREF(co);
 
 	return m;
