(synopsis is provisional, change as you see fit)

Attached Fuzzer test fails:

$ build/linux-x86_64-server-fastdebug/images/jdk/bin/java -cp 0006/ -Xmx512m -XX:+UnlockDiagnosticVMOptions -XX:+StressLCM -XX:+StressGCM -XX:+StressCCP -XX:+StressIGVN -Xcomp -XX:CompileOnly=Test -XX:-TieredCompilation -XX:StressSeed=85215050 Test

# Internal Error (/home/shade/trunks/jdk/src/hotspot/share/opto/type.hpp:1743), pid=3117013, tid=3117054
# assert(_base == Long) failed: Not a Long
#
# JRE version: OpenJDK Runtime Environment (19.0) (fastdebug build 19-internal-adhoc.shade.jdk)
# Java VM: OpenJDK 64-Bit Server VM (fastdebug 19-internal-adhoc.shade.jdk, compiled mode, sharing, compressed oops, compressed class ptrs, g1 gc, linux-amd64)
# Problematic frame:
# V [libjvm.so+0x16a6dcf] PhaseIterGVN::no_dependent_zero_check(Node*) const+0x14f

Stack: [0x00007fa05d747000,0x00007fa05d848000], sp=0x00007fa05d842f30, free space=1007k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
V [libjvm.so+0x16a6dcf] PhaseIterGVN::no_dependent_zero_check(Node*) const+0x14f
V [libjvm.so+0xeca7a9] IfNode::dominated_by(Node*, PhaseIterGVN*)+0x389
V [libjvm.so+0x16aae58] PhaseIterGVN::transform_old(Node*)+0xb8
V [libjvm.so+0x16a3f2e] PhaseIterGVN::optimize()+0x7e
V [libjvm.so+0xac2ba4] Compile::Optimize()+0x884
V [libjvm.so+0xac4b34] Compile::Compile(ciEnv*, ciMethod*, int, Options, DirectiveSet*)+0x1244
V [libjvm.so+0x8dcb8b] C2Compiler::compile_method(ciEnv*, ciMethod*, int, bool, DirectiveSet*)+0x69b
V [libjvm.so+0xad5cb8] CompileBroker::invoke_compiler_on_method(CompileTask*)+0xe48
V [libjvm.so+0xad6a48] CompileBroker::compiler_thread_loop()+0x668
V [libjvm.so+0x1a4563c] JavaThread::thread_main_inner()+0x28c
V [libjvm.so+0x1a4bc94] Thread::call_run()+0x104
V [libjvm.so+0x162450c] thread_native_entry(Thread*)+0x10c

Seems to only fail with that particular StressSeed, and bisection points to JDK-8282045 as the first bad commit (that might be accidental).