// seven independent errors; each line after an error still parses. The
// duplicate x is a word, so both conditions are type errors too; they are
// checked when their blocks close, after the missing `end if` at line 16.
SYN_EXPECTED_IDENTIFIER 1 10
SYN_EXPECTED_INTERFACE_NAME 5 21
SYN_EXPECTED_IDENTIFIER 7 22
SEM_DUPLICATE_NAME 13 7
SYN_EXPECTED_END_IF 16 7
TYP_CONDITION_NOT_BOOLEAN 14 9
TYP_CONDITION_NOT_BOOLEAN 15 8