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ERROR: Unable to parse source file : /home/adieumeg/Documents/Projects/Valencia/workspaces/vhdl_examples/ghdl/ghdl/testsuite/vests/vhdl-93/billowitch/compliant/tc1748.vhd
ERROR: Parse error at line 50 column 6:

40: BEGIN
41: 
42:   gate_1    <= '1' after 10 ns, '0' after 20 ns, '1' after 30 ns, '0' after 40 ns;
43:   gate_2    <= gate_1 after 1 ns;
44:   data_in    <=    '1' after  5 ns, '0' after 25 ns,
45:                    '1' after 35 ns, '0' after 36 ns,
46:                    '1' after 37 ns, '0' after 38 ns,
47:                    '1' after 39 ns, '0' after 40 ns,
48:                    '1' after 41 ns, '0' after 42 ns;
49: 
50:   B: block ((gate_1 and gate_2) = '1')
         ^
51:   begin
52:     data_pass    <=       data_in;
53:     data_latch    <= guarded    data_in;
54:   end block;
55: 
56:   TESTING: PROCESS(data_pass,data_latch)
57:     variable ok : integer := 1;
58:   BEGIN
59:     if (now = 5 ns) then
60:       if not(data_pass'event and data_pass = '1' and data_latch'quiet and data_latch = '0') then