# rlang 0.4.9
## Breaking changes
* Dropped support for the R 3.2 series.
## New features
* `inject()` evaluates its argument with `!!`, `!!!`, and `{{`
support.
* New `enquo0()` and `enquos0()` operators for defusing function
arguments without automatic injection (unquotation).
* `format_error_bullets()` is no longer experimental. The `message`
arguments of `abort()`, `warn()`, and `inform()` are automatically
passed to that function to make it easy to create messages with
regular, info, and error bullets. See `?format_error_bullets` for
more information.
* New `zap_srcref()` function to recursively remove source references
from functions and calls.
* A new compat file for the zeallot operator `%<-%` is now available
in the rlang repository.
* New `%<~%` operator to define a variable lazily.
* New `env_browse()` and `env_is_browsed()` functions. `env_browse()`
is equivalent to evaluating `browser()` within an environment. It
sets the environment to be persistently browsable (or unsets it if
`value = FALSE` is supplied).
* Functions created from quosures with `as_function()` now print in a
more user friendly way.
* New `rlang_print_backtrace` C callable for debugging from C
interpreters (#1059).
## Bugfixes and improvements
* The `.data` pronoun no longer skips functions (#1061). This solves a
dplyr issue involving rowwise data frames and list-columns of
functions (tidyverse/dplyr#5608).
* `as_data_mask()` now intialises environments of the correct size to
improve efficiency (#1048).
* `eval_bare()`, `eval_tidy()` (#961), and `with_handlers()` (#518)
now propagate visibility.
* `cnd_signal()` now ignores `NULL` inputs.
* Fixed bug that prevented splicing a named empty vector with the
`!!!` operator (#1045).
* The exit status of is now preserved in non-interactive sessions when
`entrace()` is used as an `options(error = )` handler (#1052,
rstudio/bookdown#920).
* `next` and `break` are now properly deparsed as nullary operators.
# rlang 0.4.8
* Backtraces now include native stacks (e.g. from C code) when the
[winch](https://r-prof.github.io/winch/) package is installed and
`rlang_trace_use_winch` is set to `TRUE` (@krlmlr).
* Compatibility with upcoming testthat 3 and magrittr 2 releases.
* `get_env()` now returns the proper environment with primitive
functions, i.e. the base namespace rather than the base environment
(r-lib/downlit#32).
* `entrace()` no longer handles non-rlang errors that carry a
backtrace. This improves compatibility with packages like callr.
* Backtraces of unhandled errors are now displayed without truncation
in non-interactive sessions (#856).
* `is_interactive()` no longer consults "rstudio.notebook.executing"
option (#1031).
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