E1019

Toplevel declaration is not left aligned. Every toplevel structure in MoonBit should be left-aligned, i.e. there is no space between the beginning of the line and the declaration.

Sometimes, earlier parsing errors might causing this error to be raised in the following lines. Therefore, when your are writing local declarations while seeing this error, you should check the previous lines for any parsing errors.

Erroneous example

  let x = 1

Suggestion

Remove the leading spaces:

let x = 1