Mesh init stage2 fails for the following input

This input leads to a failure of the code

CalculationMode = gs
ExperimentalFeatures = yes
FromScratch = yes

PeriodicDimensions = 1
Dimensions = 1

Spacing = 0.3

a = 1.
%LatticeParameters
 a 
%

%Species
"Hydrogen1D" | species_soft_coulomb| softening | 1 | valence | 1
%

%Coordinates
"Hydrogen1D" | 0
%

%KPointsGrid
 100 
%

Smearing = 0.01*eV
SmearingFunction = fermi_dirac
ExtraStates = 3

SpinComponents = spinors
GuessMagnetDensity = user_defined
%AtomsMagnetDirection
 0 | 0 | 1
%

The reported error is

At line 281 of file grid/mesh_init.F90
Fortran runtime error: Index '1' of dimension 1 of array 'grid_to_spatial' above upper bound of 0

Error termination. Backtrace:
#0  0x7f7f71e1fbd0 in ???
#1  0x7f7f71e20685 in ???
#2  0x7f7f71e20c76 in ???
#3  0x562500c07eca in __mesh_init_oct_m_MOD_mesh_init_stage_2
	at grid/mesh_init.F90:281
#4  0x562500b637f1 in __grid_oct_m_MOD_grid_init_stage_1
	at grid/grid.F90:203
#5  0x56250058ab4b in __electrons_oct_m_MOD_electrons_constructor
	at electrons/electrons.F90:196
#6  0x56250041a687 in __run_oct_m_MOD_run
	at main/run.F90:169
#7  0x562500419b87 in octopus
	at main/main.F90:140
#8  0x562500419628 in main
	at main/main.F90:26

We should add an assert to avoid that this gets unnoticed in the future and fix the code.