Scanning a method for initialized final field updates can fail (in Rewriter::scan_method()).

If the field targeted by a putfield/putstatic is non-existent, klass->find_field() returns NULL and fd is not initialized.

http://hg.openjdk.java.net/jdk9/hs/hotspot/file/a57e11acea79/src/share/vm/interpreter/rewriter.cpp#l429

However, as the return value of find_field() is not checked, data from the uninitialized field is read and that triggers an assert in set_has_initialized_final_field_update().

http://hg.openjdk.java.net/jdk9/hs/hotspot/file/a57e11acea79/src/share/vm/interpreter/rewriter.cpp#l433

# Internal Error (/opt/jprt/T/P1/120200.zmajo/s/hotspot/src/share/vm/runtime/handles.hpp:173), pid=8027, tid=0xe2eaeb40
# assert(_value != NULL) failed: resolving NULL _value
[...]
V [libjvm.so+0x9f021b] VMError::report_and_die()+0x17b
V [libjvm.so+0x392638] report_vm_error(char const*, int, char const*, char const*)+0x68
V [libjvm.so+0x8cbaa7] fieldDescriptor::set_has_initialized_final_update(bool)+0x97
V [libjvm.so+0x8c9be6] Rewriter::scan_method(Method*, bool, bool*)+0xa76
V [libjvm.so+0x8c9d44] Rewriter::rewrite_bytecodes(Thread*)+0xb4
V [libjvm.so+0x8ca1cb] Rewriter::Rewriter(instanceKlassHandle, constantPoolHandle, Array<Method*>*, Thread*)+0x31b
V [libjvm.so+0x8caef3] Rewriter::rewrite(instanceKlassHandle, Thread*)+0x123
V [libjvm.so+0x4d3c8e] InstanceKlass::rewrite_class(Thread*)+0x9e
V [libjvm.so+0x4d528a] InstanceKlass::link_class_impl(instanceKlassHandle, bool, Thread*)+0x60a
V [libjvm.so+0x4d550a] InstanceKlass::link_class(Thread*)+0x8a
V [libjvm.so+0x4d554c] InstanceKlass::initialize_impl(instanceKlassHandle, Thread*)+0x1c
V [libjvm.so+0x4d5b63] InstanceKlass::initialize(Thread*)+0x83
V [libjvm.so+0x62899d] find_class_from_class_loader(JNIEnv_*, Symbol*, unsigned char, Handle, Handle, unsigned char, Thread*)+0xed
V [libjvm.so+0x649b67] JVM_FindClassFromCaller+0x4d7
C [libjava.so+0xa46d] Java_java_lang_Class_forName0+0x14d
[...]

This bug was triggered with the vm/classfmt/vrf/vrfpsf202/vrfpsf20202m1 test; the test tries to access a non-existent field and is expected to fail with:

"Passed with runtime exception: java.lang.NoSuchFieldError: ibGlob"

The bug triggered while I was testing the 8u backport of JDK-8157181 and JDK-8160551. The bug is not triggered with JDK 9, but it would be nevertheless good to fix it in 9 and then backport it to 8.