ifelse() with nonexistent variable not handled smoothly

[peterbenmeyer]

This expression caused an error. The user make the mistake of referring to 'xyz' which was never created. Just a misspelling.
The resulting message advised me to report it here.

ifelse(slimcps1970s$xyz == slimcps1970s$OCC1990, "Match", "Mismatch")
Error in vec_equal():
! Unsupported vctrs type null.
ℹ In file type-info.c at line 117.
ℹ This is an internal error that was detected in the vctrs package.
Please report it at https://github.com/r-lib/vctrs/issues with a reprex and the full backtrace.
Backtrace:
▆

1. ├─base::ifelse(...)
2. ├─vctrs:::==.vctrs_vctr(slimcps1970s$xyz, slimcps1970s$OCC1990)
3. │ └─vctrs::vec_equal(e1, e2)
4. └─rlang:::stop_internal_c_lib(...)
5. └─rlang::abort(message, call = call, .internal = TRUE, .frame = frame)
   Warning message:
   Unknown or uninitialised column: xyz.