Quartus cannot properly interpret VHDL2008 select? statements.

It may also be prudent to note that the 'case when' syntax using wildcards is also broken:

    --/-----------------------------\
    --| OPCODE INSTRUCTION DECODING |
    --\-----------------------------/
    case? fetched_instruction is
    when "-----------------000-----00000--" =>
    next_decoded_opcode <= LB;    
    when "-----------------001-----00000--" =>
    next_decoded_opcode <= LH;    
    when "-----------------010-----00000--" =>
    next_decoded_opcode <= LW;    
    when "-----------------100-----00000--" =>
    next_decoded_opcode <= LBU;    
    when "-----------------101-----00000--" =>
    next_decoded_opcode <= LHU;    
    when "-----------------000-----01000--" =>
    next_decoded_opcode <= SB;    
    when "-----------------001-----01000--" =>
    next_decoded_opcode <= SH;    
    when "-----------------010-----01000--" =>
    next_decoded_opcode <= SW;    
    when "-----------------000-----11000--" =>
    next_decoded_opcode <= BEQ;    
    when "-----------------001-----11000--" =>
    next_decoded_opcode <= BNE;    
    when "-----------------100-----11000--" =>
    next_decoded_opcode <= BLT;    
    when "-----------------101-----11000--" =>
    next_decoded_opcode <= BGE;    
    when "-----------------110-----11000--" =>
    next_decoded_opcode <= BLTU;    
    when "-----------------111-----11000--" =>
    next_decoded_opcode <= BGEU;    
    when "-------------------------11001--" =>
    next_decoded_opcode <= JALR;    
    when "-------------------------11011--" =>
    next_decoded_opcode <= JAL;    
    when "-----------------000-----00100--" =>
    next_decoded_opcode <= Addi;    
    when "-----------------001-----00100--" =>
    next_decoded_opcode <= SLLI;    
    when "-----------------010-----00100--" =>
    next_decoded_opcode <= SLTI;    
    when "-----------------011-----00100--" =>
    next_decoded_opcode <= SLTIU;    
    when "-----------------100-----00100--" =>
    next_decoded_opcode <= XORI;    
    when "-----------------110-----00100--" =>
    next_decoded_opcode <= ORI;    
    when "-----------------111-----00100--" =>
    next_decoded_opcode <= ANDI;    
    when "-0---------------101-----00100--" =>
    next_decoded_opcode <= SRLI;    
    when "-1---------------101-----00100--" =>
    next_decoded_opcode <= SRAI;    
    when "-0---------------000-----01100--" =>
    next_decoded_opcode <= ADD;    
    when "-1---------------000-----01100--" =>
    next_decoded_opcode <= SUB;    
    when "-----------------001-----01100--" =>
    next_decoded_opcode <= inst_SLL;    
    when "-----------------010-----01100--" =>
    next_decoded_opcode <= SLT;    
    when "-----------------011-----01100--" =>
    next_decoded_opcode <= SLTU;    
    when "-----------------100-----01100--" =>
    next_decoded_opcode <= inst_XOR;    
    when "-0---------------101-----01100--" =>
    next_decoded_opcode <= inst_SRL;    
    when "-1---------------101-----01100--" =>
    next_decoded_opcode <= inst_SRA;    
    when "-----------------110-----01100--" =>
    next_decoded_opcode <= inst_OR;    
    when "-----------------111-----01100--" =>
    next_decoded_opcode <= inst_AND;    
    when "-------------------------00101--" =>
    next_decoded_opcode <= AUIPC;    
    when "-------------------------01101--" =>
    next_decoded_opcode <= LUI;    
    when "-----------------010-----11100--" =>
    next_decoded_opcode <= CSRRS;       -- NEEDS IMPLEMENTATION--
    when "-----------------001-----11100--" =>
    next_decoded_opcode <= CSRRW;       -- NEEDS IMPLEMENTATION--
    when "-----------------011-----11100--" =>
    next_decoded_opcode <= CSRRC;       -- NEEDS IMPLEMENTATION--
    when "-----------------110-----11100--" =>
    next_decoded_opcode <= CSRRSI;      -- NEEDS IMPLEMENTATION--
    when "-----------------101-----11100--" =>
    next_decoded_opcode <= CSRRWI;      -- NEEDS IMPLEMENTATION--
    when "-----------------111-----11100--" =>
    next_decoded_opcode <= CSRRCI;      -- NEEDS IMPLEMENTATION--
    when others =>
    next_decoded_opcode <= INVALID;