This is an attempt to produce a different h2 stuck request issue which still appears after the fix to hyper issue #2419. Code is based off https://github.com/fasterthanlime/h2-repro.
Tested against hyper 0.14.25
The key difference is a lot more requests are made, (8k), but handled through
a futured buffered stream so no more than 100 are accepted concurrently.
cargo run --release is enough to show the problem.
Generally hangs after about 4K requests.