E4086

E4086#

The labels are required by this function, but not supplied.

Sometimes this error occurs when you mistakenly treat a labelled argument as a positional argument. There are some common functions that require labelled arguments, such as:

  • @test.snapshot. Remember to supply filename as a labelled argument.

  • @test.inspect. Remember to supply content as a labelled argument.

Erroneous example#

///|
pub fn f(name~ : String) -> Unit {
  println("Hello, \{name}")
}

///|
test {
  f("John") // Error: The labels name~ are required by this function, but not supplied.
}

Suggestion#

Check the signature of the function and provide the correct labelled argument.

///|
pub fn f(name~ : String) -> Unit {
  println("Hello, \{name}")
}

///|
test {
  f(name="John")
}
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