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-rw-r--r--lib/rubygems/s3_uri_signer.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/rubygems/s3_uri_signer.rb b/lib/rubygems/s3_uri_signer.rb
index ff9dde30ed..534b8676a0 100644
--- a/lib/rubygems/s3_uri_signer.rb
+++ b/lib/rubygems/s3_uri_signer.rb
@@ -152,7 +152,7 @@ class Gem::S3URISigner
iam_info = ec2_metadata_request(EC2_IAM_INFO)
# Expected format: arn:aws:iam::<id>:instance-profile/<role_name>
- role_name = iam_info['InstanceProfileArn'].split('/')[1]
+ role_name = iam_info['InstanceProfileArn'].split('/').last
ec2_metadata_request(EC2_IAM_SECURITY_CREDENTIALS + role_name)
end