Crash with i/o selection

The automated tests stumbled upon an issue.

./configure --with-metis --enable-debugging-checks --disable-vec --enable-debug --with-ext-potential=point-mass
make
cd examples/EAGLE_6
../swift -c -s -S -G -t 4 eagle_6.yml -e -n 16

leads to:

 Welcome to the cosmological hydrodynamical code
    ______       _________________
   / ___/ |     / /  _/ ___/_  __/
   \__ \| | /| / // // /_   / /   
  ___/ /| |/ |/ // // __/  / /    
 /____/ |__/|__/___/_/    /_/     
 SPH With Inter-dependent Fine-grained Tasking

 Version : 0.7.0
 Revision: v0.7.0-576-gb11129a4-dirty, Branch: (no branch), Date: 2018-06-01 12:31:02 +0100
 Webpage : www.swiftsim.com

 Config. options: '--with-metis --enable-debugging-checks --disable-vec --enable-debug --with-ext-potential=point-mass'

 Compiler: GCC, Version: 4.8.1
 CFLAGS  : '-g -O0  -gdwarf-2 -fvar-tracking-assignments -O3 -fomit-frame-pointer -malign-double -fstrict-aliasing -ffast-math -funroll-loops -march=corei7-avx -mavx -fno-tree-vectorize -pthread -Wall -Wextra -Wno-unused-parameter -Wshadow -Werror -Wstrict-prototypes'

 HDF5 library version: 1.8.9
 FFTW library version: 3.x (details not available)
 GSL  library version: 1.15

[00000.0] main: CPU frequency used for tick conversion: 2200000677 Hz
[00000.0] main: Running on: cosma-f.cosma
[00000.0] main: WARNING: Debugging checks activated. Code will be slower !
[00000.0] main: WARNING: Floating point exceptions will be reported.
[00000.0] main: sizeof(part)        is  160 bytes.
[00000.0] main: sizeof(xpart)       is   64 bytes.
[00000.0] main: sizeof(spart)       is   96 bytes.
[00000.0] main: sizeof(gpart)       is  128 bytes.
[00000.0] main: sizeof(multipole)   is  248 bytes.
[00000.0] main: sizeof(grav_tensor) is  248 bytes.
[00000.0] main: sizeof(task)        is   64 bytes.
[00000.0] main: sizeof(cell)        is  832 bytes.
[00000.0] main: Reading runtime parameters from file 'eagle_6.yml'
[00000.2] cosmology_print: Density parameters: [O_m, O_l, O_b, O_k, O_r] = [0.307000, 0.693000, 0.045500, 0.000000, 0.000000]
[00000.2] cosmology_print: Dark energy equation of state: w_0=-1.000000 w_a=0.000000
[00000.2] cosmology_print: Hubble constant: h = 0.677700, H_0 = 6.777001e+01 U_t^(-1)
[00000.2] cosmology_print: Hubble time: 1/H0 = 1.475579e-02 U_t
[00000.2] cosmology_print: Universe age at present day: 1.413442e-02 U_t
[00000.2] main: Reading ICs from file './EAGLE_ICs_6.hdf5'
[00000.2] main: Cleaning up h-factors (h=0.677700)
[00000.3] io_read_unit_system: Reading IC units from ICs.
[00000.3] read_ic_single: IC and internal units match. No conversion needed.
[00003.0] read_ic_single: Particle Type 5 not yet supported. Particles ignored
[00003.0] main: Reading initial conditions took 2787.250 ms.
[00003.1] part_verify_links: All links OK
[00003.1] main: Read 800648 gas particles, 29847 star particles and 1661079 gparts from the ICs.
[00003.1] common_io.c:io_check_output_fields():860: Particle Type 2 not yet supported. Aborting

Seems like the check is not doing the right thing here.