root@generic:/usr/obj/usr/src/arm64.aarch64/lib/libc # gdb /usr/bin/cc
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Reading symbols from /usr/bin/cc...Reading symbols from /usr/lib/debug//usr/bin/clang.debug...done.
done.
(gdb) core cc.core
[New LWP 100164]
Core was generated by `/usr/bin/cc -cc1 -triple aarch64-unknown-freebsd13.0 -emit-obj -disable-free -ma'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  LookupBucketFor () at /usr/src/contrib/llvm/lib/Support/StringMap.cpp:79
warning: Source file is more recent than executable.
79	  unsigned HTSize = NumBuckets;
(gdb) bt
#0  LookupBucketFor () at /usr/src/contrib/llvm/lib/Support/StringMap.cpp:79
#1  0x0000000003aeaa30 in try_emplace<llvm::cl::Option*> () at /usr/src/contrib/llvm/include/llvm/ADT/StringMap.h:396
#2  0x0000000003aeabac in insert () at /usr/src/contrib/llvm/include/llvm/ADT/StringMap.h:387
#3  addOption () at /usr/src/contrib/llvm/lib/Support/CommandLine.cpp:151
#4  0x0000000003ae1c00 in addOption () at /usr/src/contrib/llvm/lib/Support/CommandLine.cpp:194
#5  addArgument () at /usr/src/contrib/llvm/lib/Support/CommandLine.cpp:357
#6  0x000000000305207c in _GLOBAL__sub_I_CorrelatedValuePropagation.cpp ()
    at /usr/src/contrib/llvm/include/llvm/Support/CommandLine.h:1342
#7  0x00000000011d01a0 in handle_static_init (argc=139, argv=0xffffffffcab8, env=0xffffffffcf18)
    at /usr/src/lib/csu/common/ignore_init.c:124
#8  0x00000000011d00a8 in __start (argc=139, argv=0xffffffffcab8, env=0xffffffffcf18, cleanup=<optimized out>)
    at /usr/src/lib/csu/aarch64/crt1.c:83
#9  0x00000000011d0000 in ?? ()
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) quit