TPZ2001: Unexpected token

Compiler phase: parse.

Compiler explanation: The parser found a token that cannot appear in this grammar position.

Message templates. The marker ⟨value⟩ stands for text computed for the reported program.

• expected an expression Source
• expected a statement separator Source
• expected a statement Source
• a record spread ... must be the FIRST element and appear at most once Source
• expected , or } Source
• expected : after timeout Source
• expected a duration literal, e.g. 3s Source
• expected a concurrent arm Source
• concurrent requires at least one arm Source
• expected case Source
• match requires at least one case Source
• expected a range endpoint after .., e.g. 1..5 Source
• a record type requires at least one field Source
• a literal type cannot contain interpolation Source
• a record pattern requires at least one field Source

Observed for the candidate in Topaz 5.21.3. Execution

• error[TPZ2001]: expected an expression

A let declaration needs a binding pattern before its initializer. In the reproduction, = appears where that pattern must begin, so parsing stops at the equals sign.

Insert the intended binding name between let and =. Fix this first parse error before interpreting any recovery messages.