Removing the raised error "Waveform longer than frequency array".

bilby/gw/source.py

@@ -383,7 +383,10 @@ def _base_lal_cbc_fd_waveform(
     h_cross = np.zeros_like(frequency_array, dtype=np.complex)
 
     if len(hplus.data.data) > len(frequency_array):
-        raise ValueError("Waveform longer than frequency array")
+        # lalsim waveform arrays can be padded with zeros up to
+        # a power of two length which can be greater than our length.
+        h_plus = hplus.data.data[:len(h_plus)]
+        h_cross = hcross.data.data[:len(h_cross)]
 
     h_plus[:len(hplus.data.data)] = hplus.data.data
     h_cross[:len(hcross.data.data)] = hcross.data.data