read-fwf.md
In readr: Read Rectangular Text Data

error on empty spec (#511, #519)

Code
  read_fwf(I(txt), pos)
Condition
  Error:
  ! Zero-length begin and end specifications not supported

error on negatives in fwf spec

Code
  read_fwf(I(txt), pos)
Condition
  Error:
  ! Begin offset (-2) must be greater than 0

fwf_cols throws error when arguments are not length 1 or 2

Code
  fwf_cols(a = 1:3, b = 4:5)
Condition
  Error in `recycle_columns()`:
  ! Tibble columns must have compatible sizes.
  * Size 2: Column `b`.
  * Size 3: Column `a`.
  i Only values of size one are recycled.

Code
  fwf_cols(a = c(), b = 4:5)
Condition
  Error in `recycle_columns()`:
  ! Tibble columns must have compatible sizes.
  * Size 0: Column `a`.
  * Size 2: Column `b`.
  i Only values of size one are recycled.