Assertion failure compiling for hybrid ("Ptr must be a pointer to Val type!")

[acoplan-arm]

For the following C++ testcase:

int * __capability *f(int **p) {
    return p;
}

CHERI LLVM does the following (on multiple hybrid CHERI targets):

clang++: /local/scratch/jenkins/workspace/orello-LLVM-linux_morello_master/morello-llvm-project/llvm/lib/IR/Instructions.cpp:1491: void llvm::StoreInst::AssertOK(): Assertion `cast<PointerType>(getOperand(1)->getType()) ->isOpaqueOrPointeeTypeMatches(getOperand(0)->getType()) && "Ptr must be a pointer to Val type!"' failed.
PLEASE submit a bug report to https://git.morello-project.org/morello/llvm-project/-/issues and include the crash backtrace, preprocessed source, and associated run script.
If you built clang from source, please provide a reduced test case by running:
	$LLVM_BUILD_DIR/bin/creduce_crash_testcase.py <reproducer>.sh
Stack dump:
0.	Program arguments: /morello-sdk/bin/clang++ -g -o /tmp/compiler-explorer-compiler2022107-80-1yniz0w.c5oo/output.s -mllvm --x86-asm-syntax=intel -S -target aarch64-unknown-freebsd13 --sysroot=/morello-sdk/sysroot-morello-purecap -Wall -march=morello -mabi=aapcs -fcolor-diagnostics -fno-crash-diagnostics -O2 <source>
1.	<eof> parser at end of file
2.	<source>:1:21: LLVM IR generation of declaration 'f'
3.	<source>:1:21: Generating code for declaration 'f'
 #0 0x00000000049bd80c llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/morello-sdk/bin/clang+++0x49bd80c)
 #1 0x00000000049bb25e llvm::sys::RunSignalHandlers() (/morello-sdk/bin/clang+++0x49bb25e)
 #2 0x00000000049bcacd llvm::sys::CleanupOnSignal(unsigned long) (/morello-sdk/bin/clang+++0x49bcacd)
 #3 0x00000000049259a8 (/morello-sdk/bin/clang+++0x49259a8)
 #4 0x0000000004925c95 (/morello-sdk/bin/clang+++0x4925c95)
 #5 0x00007f954f0f8420 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0x14420)
 #6 0x00007f954ed6f00b raise (/lib/x86_64-linux-gnu/libc.so.6+0x4300b)
 #7 0x00007f954ed4e859 abort (/lib/x86_64-linux-gnu/libc.so.6+0x22859)
 #8 0x00007f954ed4e729 (/lib/x86_64-linux-gnu/libc.so.6+0x22729)
 #9 0x00007f954ed5ffd6 (/lib/x86_64-linux-gnu/libc.so.6+0x33fd6)
#10 0x0000000004154f95 llvm::StoreInst::AssertOK() (/morello-sdk/bin/clang+++0x4154f95)
#11 0x00000000036f3725 (/morello-sdk/bin/clang+++0x36f3725)
#12 0x0000000004dd9d2c clang::CodeGen::CodeGenFunction::EmitReturnStmt(clang::ReturnStmt const&) (/morello-sdk/bin/clang+++0x4dd9d2c)
#13 0x0000000004dd5a47 clang::CodeGen::CodeGenFunction::EmitStmt(clang::Stmt const*, llvm::ArrayRef<clang::Attr const*>) (/morello-sdk/bin/clang+++0x4dd5a47)
#14 0x0000000004de2fc0 clang::CodeGen::CodeGenFunction::EmitCompoundStmtWithoutScope(clang::CompoundStmt const&, bool, clang::CodeGen::AggValueSlot) (/morello-sdk/bin/clang+++0x4de2fc0)
#15 0x0000000004d67dde clang::CodeGen::CodeGenFunction::EmitFunctionBody(clang::Stmt const*) (/morello-sdk/bin/clang+++0x4d67dde)
#16 0x0000000004d68bde clang::CodeGen::CodeGenFunction::GenerateCode(clang::GlobalDecl, llvm::Function*, clang::CodeGen::CGFunctionInfo const&) (/morello-sdk/bin/clang+++0x4d68bde)
#17 0x0000000004cc8b39 clang::CodeGen::CodeGenModule::EmitGlobalFunctionDefinition(clang::GlobalDecl, llvm::GlobalValue*) (/morello-sdk/bin/clang+++0x4cc8b39)
#18 0x0000000004cbe49a clang::CodeGen::CodeGenModule::EmitGlobalDefinition(clang::GlobalDecl, llvm::GlobalValue*) (/morello-sdk/bin/clang+++0x4cbe49a)
#19 0x0000000004ccd29a clang::CodeGen::CodeGenModule::EmitTopLevelDecl(clang::Decl*) (/morello-sdk/bin/clang+++0x4ccd29a)
#20 0x00000000056d9b20 (/morello-sdk/bin/clang+++0x56d9b20)
#21 0x00000000056d7025 (/morello-sdk/bin/clang+++0x56d7025)
#22 0x0000000006044474 clang::ParseAST(clang::Sema&, bool, bool) (/morello-sdk/bin/clang+++0x6044474)
#23 0x000000000560ef12 clang::FrontendAction::Execute() (/morello-sdk/bin/clang+++0x560ef12)
#24 0x0000000005575d28 clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/morello-sdk/bin/clang+++0x5575d28)
#25 0x00000000056d07d5 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/morello-sdk/bin/clang+++0x56d07d5)
#26 0x0000000002fc08c9 cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/morello-sdk/bin/clang+++0x2fc08c9)
#27 0x0000000002fbe6ee (/morello-sdk/bin/clang+++0x2fbe6ee)
#28 0x00000000053c5022 (/morello-sdk/bin/clang+++0x53c5022)
#29 0x000000000492586c llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/morello-sdk/bin/clang+++0x492586c)
#30 0x00000000053c4b8a clang::driver::CC1Command::Execute(llvm::ArrayRef<llvm::Optional<llvm::StringRef> >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*, bool*) const (/morello-sdk/bin/clang+++0x53c4b8a)
#31 0x0000000005383bfd clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&) const (/morello-sdk/bin/clang+++0x5383bfd)
#32 0x0000000005384187 clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*> >&) const (/morello-sdk/bin/clang+++0x5384187)
#33 0x00000000053a313b clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*> >&) (/morello-sdk/bin/clang+++0x53a313b)
#34 0x0000000002fbdfb7 main (/morello-sdk/bin/clang+++0x2fbdfb7)
#35 0x00007f954ed50083 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x24083)
#36 0x0000000002f16f9a _start (/morello-sdk/bin/clang+++0x2f16f9a)
clang-13: error: clang frontend command failed with exit code 134 (use -v to see invocation)
Compiler returned: 134

[jrtc27]

This no longer reproduces with CHERI LLVM (but still does with Morello LLVM). I can't immediately see what fixed it, so unsure if it was our bug or upstream's.