Crash handling array of strings

[tasgomes]

The following VHDL code makes NVC to crash:

    type StringArray_t                  is array (natural range <>) of string;

    constant MyStringArray_c : StringArray_t(0 to 6) := (
        0 => "TEST 0: Test all whatever description here",
        1 => "TEST 1: Test all whatever description here",
        2 => "TEST 2: Test all whatever description here",
        3 => "TEST 3: Test all whatever description here",
        4 => "TEST 4: Test all whatever description here",
        5 => "TEST 5: Test all whatever description here",
        6 => "TEST 6: Test all whatever description here"
    );

This is okay with GHDL, Questa and Modelsim.

The output error log is quite extensive so I attach a file with it: log.txt

Setup to reproduce nvc_bug_5.zip

To reproduce open a console, go to folder fw, and execute:
python3 -u ./sim/run.py -o ./sim/vunit_out/nvc --simulator nvc --simulator-path C:/NVC_1_13_2/bin --vendor-lib ./fw/sim/sim_lib/nvc

Please adapt the path of the NVC installation folder in the command above (see --simulator-path).