duplicate_module.m:020: In module `duplicate_module':
duplicate_module.m:020:   error: submodule `duplicate_module.child', declared
duplicate_module.m:020:   here as a nested submodule, was previously declared
duplicate_module.m:020:   to be a separate submodule.
duplicate_module.m:018:   This is the location of that previous declaration.
duplicate_module.m:041: In module `duplicate_module':
duplicate_module.m:041:   error: submodule `duplicate_module.child2', declared
duplicate_module.m:041:   here as a nested submodule, was previously declared
duplicate_module.m:041:   to be a separate submodule.
duplicate_module.m:039:   This is the location of that previous declaration.
duplicate_module.m:062: In module `duplicate_module':
duplicate_module.m:062:   error: submodule `duplicate_module.child3', declared
duplicate_module.m:062:   here as a nested submodule, was previously declared
duplicate_module.m:062:   to be a separate submodule.
duplicate_module.m:060:   This is the location of that previous declaration.
duplicate_module.m:094: In module `duplicate_module':
duplicate_module.m:094:   error: submodule `duplicate_module.child4', included
duplicate_module.m:094:   here as separate submodule, was previously declared
duplicate_module.m:094:   to be a nested submodule.
duplicate_module.m:081:   This is the location of that previous declaration.
duplicate_module.m:099: In module `duplicate_module':
duplicate_module.m:099:   error: submodule `duplicate_module.child5', included
duplicate_module.m:099:   here as separate submodule, has already been declared
duplicate_module.m:099:   to be a separate submodule.
duplicate_module.m:098:   This is the location of that previous declaration.