[Bug 3475] clang-15 amd64 ED25519 signature verification nondeterministic spurious failure

[bugzilla-daemon at mindrot.org]

https://bugzilla.mindrot.org/show_bug.cgi?id=3475

--- Comment #6 from Darren Tucker <dtucker at dtucker.net> ---
15.0.6 seems to have the same problem.

$ /opt/clang-15.0.6/bin/clang --version
clang version 15.0.6 (https://github.com/llvm/llvm-project.git
088f33605d8a61ff519c580a71b1dd57d16a03f8)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /opt/clang-15.0.6/bin

$ CC=/opt/clang-15.0.6/bin/clang ../../configure

$ for i in `seq 0 9`; do make clean >/dev/null 2>&1; make -j24
>/dev/null 2>&1; for j in `seq 0 9`; do if make t-exec LTESTS=connect
>/dev/null 2>&1; then echo -n "good "; else echo -n "bad "; fi;done;
echo; done
bad bad bad bad bad bad bad bad bad bad 
good good good good good good good good good good 
good good good good good good good good good good 
bad bad bad bad bad bad bad bad bad bad 
good good good good good good good good good good 
good good good good good good good good good good 
good good good good good good good good good good 
good good good good good good good good good good 
bad bad bad bad bad bad bad bad bad bad 
good good good good good good good good good good 

$ tail -4 regress/failed-ssh.log 
debug2: ssh_ed25519_verify: crypto_sign_ed25519_open failed: -1
ssh_dispatch_run_fatal: Connection to UNKNOWN port 65535: incorrect
signature
FAIL: ssh proxycommand connect failed

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