llvm dev - May 2019 - ld: malformed dylib has MH_NO_REEXPORTED_DYLIBS flag but no LC_REEXPORT_DYLIB with MachO lld

Using lld/macho I'm getting:
ld: malformed dylib has MH_NO_REEXPORTED_DYLIBS flag but no LC_REEXPORT_DYLIB
load commands: /Users/ck/libClassLibrary50.dylib file
'/Users/ck/libClassLibrary50.dylib'

when trying to link to an LLD linked dylib

the commandline is:
lld -flavor ld64 -dylib -arch x86_64 -sdk_version 10.14 -L "." -o
"/libClassLibrary50.dylib" "ClassLibrary50.a"
"ClassLibrary50.o" "Island.a" "libgc.a"
"ClassLibrary50.a"

What am I doing wrong and/or what can I do to fix this?