Log Message:
Changes 1.19.0:
We fixed memory leak bug which only occurs in server side session. Client side \ 
sessions are not affected. This bug was detected by LLVM libFuzzer with HTTP/2 \ 
corpus that h2o
project uses. Due to the bad code path which nullifies next pointers of linked \ 
list in a certain condition, nghttp2_stream object is not going to be freed. We \ 
highly encourage to upgrade the existing installation to this latest version.