Can we add more context for Can't rename in this context errors?

[DavisVaughan]

This came up in tidyverse/dplyr#6745

We've started using allow_rename = FALSE more often when our interfaces use tidy selection purely for selection (i.e. when we don't allow named inputs for possible renaming), so this error has popped up more often.

I think it would be useful if we could mention the expression causing the issue, like how we do here:

library(tidyselect)
library(rlang)

eval_select(expr(all_of(x)), mtcars)
#> Error:
#> ! Problem while evaluating `all_of(x)`.
#> Caused by error in `as_indices_impl()`:
#> ! object 'x' not found

I'm imagining something like this for tidyverse/dplyr#6745:

#> Error in `rename_with()`:
#> ! Problem while evaluating `all_of(x)`.
#> ! Can't rename variables in this context.

[DavisVaughan]

Another one tidyverse/tidyr#1481

[olivroy]

@DavisVaughan I liked your suggestion in #358 (comment), but I didn't feel confident enough to implement it. If you have time, feel free to revisit!