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-rw-r--r--lib/rubygems/package/tar_writer.rb2
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/rubygems/package/tar_writer.rb b/lib/rubygems/package/tar_writer.rb
index ab0313c9f8..2c94c95123 100644
--- a/lib/rubygems/package/tar_writer.rb
+++ b/lib/rubygems/package/tar_writer.rb
@@ -196,6 +196,8 @@ class Gem::Package::TarWriter
digest_name == signer.digest_name
end
+ raise "no #{signer.digest_name} in #{digests.values.compact}" unless signature_digest
+
if signer.key then
signature = signer.sign signature_digest.digest