write_buildcustomize.pl now test loads the generated lib/buildcustomize.pl

And deletes it if it encounters an error whilst loading it. A non-functional
lib/buildcustomize.pl will cause the build to fail with seemingly unrelated
errors. Deleting it and exiting with an error should make the cause of build
failures obvious.

1 files changed, 6 insertions, 2 deletions

diff --git a/write_buildcustomize.pl b/write_buildcustomize.pl
index 709923baa2..92c75de93e 100644
--- a/write_buildcustomize.pl
+++ b/write_buildcustomize.pl
@@ -65,8 +65,12 @@ if ($error) {
     close $fh
         or warn "Can't unlink $file after error: $!";
 } else {
-    close $fh and exit;
-    $error = "Can't close $file: $!";
+    if (close $fh) {
+        do $file and exit;
+        $error = "Can't load generated $file: $@";
+    } else {
+        $error = "Can't close $file: $!";
+    }
 }
 
 # It's going very wrong, so try to remove the botched file.