rlang-errors.md
In cli: Helpers for Developing Command Line Interfaces

cli_abort() captures correct call and backtrace

Code
  print(expect_error(f()))
Output
  <error/rlang_error>
  Error in `h()`:
  ! foo
  ---
  Backtrace:
       x
    1. +-base::print(expect_error(f()))
    2. +-testthat::expect_error(f())
    3. | \-testthat:::expect_condition_matching(...)
    4. |   \-testthat:::quasi_capture(...)
    5. |     +-testthat (local) .capture(...)
    6. |     | \-base::withCallingHandlers(...)
    7. |     \-rlang::eval_bare(quo_get_expr(.quo), quo_get_env(.quo))
    8. \-cli (local) f()
    9.   \-cli (local) g()
   10.     \-cli (local) h()

Code
  print(expect_error(f(list())))
Output
  <error/cli_my_class>
  Error in `h()`:
  ! `x` can't be empty.
  ---
  Backtrace:
       x
    1. +-base::print(expect_error(f(list())))
    2. +-testthat::expect_error(f(list()))
    3. | \-testthat:::expect_condition_matching(...)
    4. |   \-testthat:::quasi_capture(...)
    5. |     +-testthat (local) .capture(...)
    6. |     | \-base::withCallingHandlers(...)
    7. |     \-rlang::eval_bare(quo_get_expr(.quo), quo_get_env(.quo))
    8. \-cli (local) f(list())
    9.   \-cli (local) g(x)
   10.     \-cli (local) h(x)

cli_abort(.internal = TRUE) reports the correct function (r-lib/rlang#1386)

Code
  (expect_error(fn()))
Output
  <error/rlang_error>
  Error in `fn()`:
  ! Message.
  i This is an internal error that was detected in the base package.