BUG: Fix GDF Out of Bound Error (mne-tools#13113)

Co-authored-by: Scott Huberty <[email protected]>
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

doc/changes/devel/13113.bugfix.rst

@@ -0,0 +1 @@
+Fix bug in :func:`mne.io.read_raw_gdf`, by :newcontrib:`Rongfei Jin`.

doc/changes/names.inc

@@ -257,6 +257,7 @@
 .. _Romain Derollepot: https://github.com/rderollepot
 .. _Romain Trachel: https://fr.linkedin.com/in/trachelr
 .. _Roman Goj: https://romanmne.blogspot.co.uk
+.. _Rongfei Jin: https://github.com/greasycat
 .. _Ross Maddox: https://medicine.umich.edu/dept/khri/ross-maddox-phd
 .. _Rotem Falach: https://github.com/Falach
 .. _Roy Eric Wieske: https://github.com/Randomidous

mne/io/edf/edf.py

@@ -1453,9 +1453,7 @@ def _read_gdf_header(fname, exclude, include=None):
                     n_events = np.fromfile(fid, UINT32, 1)[0]
                 else:
                     ne = np.fromfile(fid, UINT8, 3)
-                    n_events = ne[0]
-                    for i in range(1, len(ne)):
-                        n_events = n_events + int(ne[i]) * 2 ** (i * 8)
+                    n_events = sum(int(ne[i]) << (i * 8) for i in range(len(ne)))
                     event_sr = np.fromfile(fid, FLOAT32, 1)[0]
 
                 pos = np.fromfile(fid, UINT32, n_events) - 1  # 1-based inds