The test compiler/intrinsics/classcast/NullCheckDroppingsTest.java fails in the compiler nightlies of 2016-04-01. Here is the stack trace:

#
# A fatal error has been detected by the Java Runtime Environment:
#
# Internal Error (/opt/jprt/T/P1/153346.dmitrij/s/hotspot/src/share/vm/opto/library_call.cpp:2526), pid=23163, tid=23193
# assert(alias_type->adr_type() == TypeRawPtr::BOTTOM || alias_type->adr_type() == TypeOopPtr::BOTTOM || alias_type->field() != __null || alias_type->element() != __null) failed: field, array element or unknown
#
# JRE version: Java(TM) SE Runtime Environment (9.0) (fastdebug build 9-internal+0-2016-04-01-153346.dmitrij.hs-comp)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (fastdebug 9-internal+0-2016-04-01-153346.dmitrij.hs-comp, mixed mode, compressed oops, g1 gc, linux-aarch64)
# Core dump will be written. Default location: Core dumps may be processed with "/usr/share/apport/apport %p %s %c %P" (or dumping to /export/local/aurora/sandbox/results/workDir/compiler/intrinsics/classcast/NullCheckDroppingsTest/core.23163)

[...]

Current CompileTask:
C2: 5764 245 b java.lang.invoke.LambdaForm$MH/914811991::putObjectFieldCast (43 bytes)

Stack: [0x0000007f49f00000,0x0000007f4a000000], sp=0x0000007f49ffbb50, free space=1006k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
V [libjvm.so+0xf5e284] VMError::report(outputStream*, bool)+0x1710
V [libjvm.so+0xf5e808] VMError::report_and_die(int, char const*, char const*, std::__va_list, Thread*, unsigned char*, void*, void*, char const*, int, unsigned long)+0x140
V [libjvm.so+0xf5f39c] VMError::report_and_die(Thread*, char const*, int, char const*, char const*, std::__va_list)+0x54
V [libjvm.so+0x63a688] report_vm_error(char const*, int, char const*, char const*, ...)+0xe0
V [libjvm.so+0xaf647c] LibraryCallKit::inline_unsafe_access(bool, bool, BasicType, LibraryCallKit::AccessKind, bool)+0xef8
V [libjvm.so+0xb0b6b8] LibraryIntrinsic::generate(JVMState*)+0x184
V [libjvm.so+0x6bf2a4] Parse::do_call()+0x3ac
V [libjvm.so+0xd107f4] Parse::do_one_bytecode()+0x2d94
V [libjvm.so+0xd045b4] Parse::do_one_block()+0x3e8
V [libjvm.so+0xd05118] Parse::do_all_blocks()+0x12c
V [libjvm.so+0xd06d3c] Parse::Parse(JVMState*, ciMethod*, float)+0xac0
V [libjvm.so+0x45ed80] ParseGenerator::generate(JVMState*)+0xa8
V [libjvm.so+0x5c77bc] Compile::Compile(ciEnv*, C2Compiler*, ciMethod*, int, bool, bool, bool, DirectiveSet*)+0xc2c
V [libjvm.so+0x45da98] C2Compiler::compile_method(ciEnv*, ciMethod*, int, DirectiveSet*)+0x144
V [libjvm.so+0x5d1a58] CompileBroker::invoke_compiler_on_method(CompileTask*)+0x330
V [libjvm.so+0x5d2464] CompileBroker::compiler_thread_loop()+0x22c
V [libjvm.so+0xedea68] JavaThread::thread_main_inner()+0x1c8
V [libjvm.so+0xedf2c0] JavaThread::run()+0x1cc
V [libjvm.so+0xcbb684] java_start(Thread*)+0xf0
C [libpthread.so.0+0x7e2c] start_thread+0xb0

More investigation is needed to determine the cause of the failure.