[ruby/openssl] ssl: avoid directly storing String object in NPN callback
On the server side, the serialized list of protocols is stored in SSL_CTX as a String object reference. We utilize a hidden instance variable to prevent it from being GC'ed, but this is not enough because it can also be relocated by GC.compact.
Added by rhenium (Kazuki Yamaguchi) about 4 years ago
[ruby/openssl] ssl: avoid directly storing String object in NPN callback
On the server side, the serialized list of protocols is stored in
SSL_CTX as a String object reference. We utilize a hidden instance
variable to prevent it from being GC'ed, but this is not enough because
it can also be relocated by GC.compact.
https://github.com/ruby/openssl/commit/5eb68ba778