Bug 781672: checksetup.pl fails to check the version of the latest…

Bugzilla/Install/Requirements.pm

@@ -674,8 +674,15 @@ sub have_vers {
     Bugzilla::Install::Util::set_output_encoding();
 
     # VERSION is provided by UNIVERSAL::, and can be called even if
-    # the module isn't loaded.
-    my $vnum = $module->VERSION || -1;
+    # the module isn't loaded. We eval'uate ->VERSION because it can die
+    # when the version is not valid (yes, this happens from time to time).
+    # In that case, we use an uglier method to get the version.
+    my $vnum = eval { $module->VERSION };
+    if ($@) {
+        no strict 'refs';
+        $vnum = ${"${module}::VERSION"};
+    }
+    $vnum ||= -1;
 
     # CGI's versioning scheme went 2.75, 2.751, 2.752, 2.753, 2.76
     # That breaks the standard version tests, so we need to manually correct