[Bug d/30576] New: "Too few arguments in function call." when trying to print function return values bigger than 16 bytes

[Bug d/30576] New: "Too few arguments in function call." when trying to print function return values bigger than 16 bytes

[sourceware at cy dot md]

https://sourceware.org/bugzilla/show_bug.cgi?id=30576

            Bug ID: 30576
           Summary: "Too few arguments in function call." when trying to
                    print function return values bigger than 16 bytes
           Product: gdb
           Version: 13.1
            Status: UNCONFIRMED
          Severity: minor
          Priority: P2
         Component: d
          Assignee: unassigned at sourceware dot org
          Reporter: sourceware at cy dot md
                CC: ibuclaw at gdcproject dot org
  Target Milestone: ---

If an extern(C) function in a D program has a return value larger than 16
bytes, trying to call it and print its return value from gdb results in the
error message "Too few arguments in function call.".

Reproducer:

cat > bug.d <<EOF
extern(C) auto a() { return (ubyte[16]).init; }
extern(C) auto b() { return (ubyte[17]).init; }
void main(){}
EOF

dmd -g bug

gdb -ex start \
        -ex 'echo === a() ===\n' \
        -ex 'p a()' \
        -ex 'echo === b() ===\n' \
        -ex 'p b()' \
        -ex 'stop' \
        -ex 'quit' \
        ./bug

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