Broken on R-devel? about callr HOT 1 CLOSED

Version: 2.0.1 
Check: tests 
Result: ERROR 
     Running ‘testthat.R’ [12s/38s]
    Running the tests in ‘tests/testthat.R’ failed.
    Complete output:
     > library(testthat)
     > library(callr)
     > 
     > Sys.unsetenv("R_TESTS")
     > test_check("callr")
     ── 1. Failure: error is propagated (@test-error.R#5) ──────────────────────────
     `r(function() 1 + "A")` threw an error with unexpected message.
     Expected match: "non-numeric argument to binary operator"
     Actual message: "child process crashed or was killed"
     
     ── 2. Failure: error stack is passed (@test-error.R#37) ───────────────────────
     inherits(err, "callr_error") isn't true.
     
     ── 3. Failure: error stack is passed (@test-error.R#38) ───────────────────────
     length(err$stack) not equal to 3.
     1/1 mismatches
     [1] 0 - 3 == -3
     
     ── 4. Failure: r_bg can get the error back (@test-r-bg.R#26) ──────────────────
     `x$get_result()` threw an error with unexpected message.
     Expected match: "non-numeric argument to binary operator"
     Actual message: "child process crashed or was killed"
     
     ══ testthat results ═══════════════════════════════════════════════════════════
     OK: 472 SKIPPED: 7 FAILED: 4
     1. Failure: error is propagated (@test-error.R#5) 
     2. Failure: error stack is passed (@test-error.R#37) 
     3. Failure: error stack is passed (@test-error.R#38) 
     4. Failure: r_bg can get the error back (@test-r-bg.R#26) 
     
     Error: testthat unit tests failed
     Execution halted 
Flavor: r-devel-linux-x86_64-debian-gcc