Merge pull request #1854 from poldracklab/oesteban-patch-1

FIX: Do not run STC if SliceTiming metadata is set but empty

Author: oesteban

fmriprep/workflows/bold/base.py

@@ -354,7 +354,7 @@ def init_func_preproc_wf(
             fmaps = fieldmap_wrangler(layout, ref_file, use_syn=use_syn, force_syn=force_syn)
 
         # Short circuits: (True and True and (False or 'TooShort')) == 'TooShort'
-        run_stc = ("SliceTiming" in metadata and
+        run_stc = (bool(metadata.get("SliceTiming")) and
                    'slicetiming' not in ignore and
                    (_get_series_len(ref_file) > 4 or "TooShort"))