AttributeError: 'float' object has no attribute 'clone' - when logging float values with sync_dist=True and ddp
🐛 Bug
self.log('d_acc_dummy' , 100.0, on_step=True, on_epoch=True, sync_dist=True) 

results in
/usr/local/lib/python3.6/dist-packages/pytorch_lightning/core/step_result.py in log(self, name, value, prog_bar, logger, on_step, on_epoch, reduce_fx, tbptt_reduce_fx, tbptt_pad_token, enable_graph, sync_dist, sync_dist_op, sync_dist_group, sync_fn)
    138             is_dist_initialized = torch.distributed.is_available() and torch.distributed.is_initialized()
    139             # TODO: Find a way to make the reduction only once, so we don't need to clone.
--> 140             value = value.clone() if is_dist_initialized else value
    141             value = sync_fn(value, group=sync_dist_group, reduce_op=sync_dist_op)
    142 

AttributeError: 'float' object has no attribute 'clone'

Float is allowed type (from step_result.py)
 if sync_dist and isinstance(value, (torch.Tensor, numbers.Number)):
            is_dist_initialized = torch.distributed.is_available() and torch.distributed.is_initialized()
            # TODO: Find a way to make the reduction only once, so we don't need to clone.
            value = value.clone() if is_dist_initialized else value
            value = sync_fn(value, group=sync_dist_group, reduce_op=sync_dist_op)

Please reproduce using [the BoringModel and post here]
Simple gan example
To Reproduce
Expected behavior
Logging of float values
Environment

CUDA:

GPU:

Tesla T4


available:         True
version:           10.1


Packages:

numpy:             1.18.5
pyTorch_debug:     True
pyTorch_version:   1.7.0+cu101
pytorch-lightning: 1.0.8
tqdm:              4.41.1


System:

OS:                Linux
architecture:

64bit



processor:         x86_64
python:            3.6.9
version:           #1 SMP Thu Jul 23 08:00:38 PDT 2020



Additional context