* using log directory 'd:/Rcompile/CRANpkg/local/4.0/cfid.Rcheck'
* using R version 4.0.5 (2021-03-31)
* using platform: x86_64-w64-mingw32 (64-bit)
* using session charset: ISO8859-1
* checking for file 'cfid/DESCRIPTION' ... OK
* checking extension type ... Package
* this is package 'cfid' version '0.1.2'
* package encoding: UTF-8
* checking package namespace information ... OK
* checking package dependencies ... OK
* checking if this is a source package ... OK
* checking if there is a namespace ... OK
* checking for hidden files and directories ... OK
* checking for portable file names ... OK
* checking whether package 'cfid' can be installed ... OK
* checking installed package size ... OK
* checking package directory ... OK
* checking DESCRIPTION meta-information ... OK
* checking top-level files ... OK
* checking for left-over files ... OK
* checking index information ... OK
* checking package subdirectories ... OK
* checking R files for non-ASCII characters ... OK
* checking R files for syntax errors ... OK
* checking whether the package can be loaded ... OK
* checking whether the package can be loaded with stated dependencies ... OK
* checking whether the package can be unloaded cleanly ... OK
* checking whether the namespace can be loaded with stated dependencies ... OK
* checking whether the namespace can be unloaded cleanly ... OK
* checking loading without being on the library search path ... OK
* checking use of S3 registration ... OK
* checking dependencies in R code ... OK
* checking S3 generic/method consistency ... OK
* checking replacement functions ... OK
* checking foreign function calls ... OK
* checking R code for possible problems ... [7s] NOTE
reg_match: no visible global function definition for 'gregexec'
Undefined global functions or variables:
  gregexec
* checking Rd files ... OK
* checking Rd metadata ... OK
* checking Rd cross-references ... OK
* checking for missing documentation entries ... OK
* checking for code/documentation mismatches ... OK
* checking Rd \usage sections ... OK
* checking Rd contents ... OK
* checking for unstated dependencies in examples ... OK
* checking examples ... [1s] ERROR
Running examples in 'cfid-Ex.R' failed
The error most likely occurred in:

> ### Name: CounterfactualConjunction
> ### Title: Counterfactual Conjunction
> ### Aliases: CounterfactualConjunction conj
> 
> ### ** Examples
> 
> # The conjunction described in 'details'
> v1 <- cf("Y", 0)
> v2 <- cf("Y", 1, c("X" = 0))
> c1 <- conj(v1, v2)
> 
> # Alternative construction
> c1 <- v1 + v2
> 
> # Adding further variables
> v3 <- cf("X", 1)
> c2 <- c1 + v3
Warning: Incompatible methods ("+.CounterfactualConjunction", "+.CounterfactualVariable") for "+"
Error in c1 + v3 : non-numeric argument to binary operator
Execution halted
* checking for unstated dependencies in 'tests' ... OK
* checking tests ... [3s] ERROR
  Running 'testthat.R' [3s]
Running the tests in 'tests/testthat.R' failed.
Complete output:
  > library(testthat)
  > library(cfid)
  > 
  > test_check("cfid")
  [ FAIL 12 | WARN 1 | SKIP 0 | PASS 38 ]
  
  == Failed tests ================================================================
  -- Error (test-algorithms.R:3:1): (code run outside of `test_that()`) ----------
  Error in `gregexec(pattern, x, perl)`: could not find function "gregexec"
  Backtrace:
      x
   1. \-cfid::dag("X -> W -> Y <- Z <- D X <-> Y") at test-algorithms.R:3:0
   2.   \-cfid:::reg_match(x, "\\{([^<>\\-]+)\\}|([^<> \\-]+)|(<->|<-|->)")
  -- Error (test-counterfactuals.R:50:5): arithmetic -----------------------------
  Error in `conj(v1) + v2`: non-numeric argument to binary operator
  Backtrace:
      x
   1. \-testthat::expect_identical(conj(v1) + v2, c1) at test-counterfactuals.R:50:4
   2.   \-testthat::quasi_label(enquo(object), label, arg = "object")
   3.     \-rlang::eval_bare(expr, quo_get_env(quo))
  -- Error (test-graphs.R:10:5): extra delimiter invariance ----------------------
  Error in `gregexec(pattern, x, perl)`: could not find function "gregexec"
  Backtrace:
      x
   1. +-testthat::expect_identical(dag("X -> Y -> Z"), dag("X -> Y; Y -> Z")) at test-graphs.R:10:4
   2. | \-testthat::quasi_label(enquo(object), label, arg = "object")
   3. |   \-rlang::eval_bare(expr, quo_get_env(quo))
   4. \-cfid::dag("X -> Y -> Z")
   5.   \-cfid:::reg_match(x, "\\{([^<>\\-]+)\\}|([^<> \\-]+)|(<->|<-|->)")
  -- Error (test-graphs.R:16:5): zero edges is allowed ---------------------------
  Error in `gregexec(pattern, x, perl)`: could not find function "gregexec"
  Backtrace:
      x
   1. +-testthat::expect_length(attr(dag("X Y Z"), "labels"), 3) at test-graphs.R:16:4
   2. | \-testthat::quasi_label(enquo(object), arg = "object")
   3. |   \-rlang::eval_bare(expr, quo_get_env(quo))
   4. \-cfid::dag("X Y Z")
   5.   \-cfid:::reg_match(x, "\\{([^<>\\-]+)\\}|([^<> \\-]+)|(<->|<-|->)")
  -- Error (test-graphs.R:21:5): duplicate edge invariance -----------------------
  Error in `gregexec(pattern, x, perl)`: could not find function "gregexec"
  Backtrace:
      x
   1. +-testthat::expect_identical(dag("X -> Y <- X"), dag("X -> Y")) at test-graphs.R:21:4
   2. | \-testthat::quasi_label(enquo(object), label, arg = "object")
   3. |   \-rlang::eval_bare(expr, quo_get_env(quo))
   4. \-cfid::dag("X -> Y <- X")
   5.   \-cfid:::reg_match(x, "\\{([^<>\\-]+)\\}|([^<> \\-]+)|(<->|<-|->)")
  -- Failure (test-graphs.R:42:5): allowed structures ----------------------------
  `dag("x -> {y z} <- w <-> g")` threw an unexpected error.
  Message: could not find function "gregexec"
  Class:   simpleError/error/condition
  Backtrace:
      x
   1. +-testthat::expect_error(dag("x -> {y z} <- w <-> g"), NA) at test-graphs.R:42:4
   2. | \-testthat:::expect_condition_matching(...)
   3. |   \-testthat:::quasi_capture(...)
   4. |     +-testthat .capture(...)
   5. |     | \-base::withCallingHandlers(...)
   6. |     \-rlang::eval_bare(quo_get_expr(.quo), quo_get_env(.quo))
   7. \-cfid::dag("x -> {y z} <- w <-> g")
   8.   \-cfid:::reg_match(x, "\\{([^<>\\-]+)\\}|([^<> \\-]+)|(<->|<-|->)")
  -- Failure (test-graphs.R:43:5): allowed structures ----------------------------
  `dag("{x z} -> {y w}")` threw an unexpected error.
  Message: could not find function "gregexec"
  Class:   simpleError/error/condition
  Backtrace:
      x
   1. +-testthat::expect_error(dag("{x z} -> {y w}"), NA) at test-graphs.R:43:4
   2. | \-testthat:::expect_condition_matching(...)
   3. |   \-testthat:::quasi_capture(...)
   4. |     +-testthat .capture(...)
   5. |     | \-base::withCallingHandlers(...)
   6. |     \-rlang::eval_bare(quo_get_expr(.quo), quo_get_env(.quo))
   7. \-cfid::dag("{x z} -> {y w}")
   8.   \-cfid:::reg_match(x, "\\{([^<>\\-]+)\\}|([^<> \\-]+)|(<->|<-|->)")
  -- Failure (test-graphs.R:44:5): allowed structures ----------------------------
  `dag("x -> z -> y; x <-> y")` threw an unexpected error.
  Message: could not find function "gregexec"
  Class:   simpleError/error/condition
  Backtrace:
      x
   1. +-testthat::expect_error(dag("x -> z -> y; x <-> y"), NA) at test-graphs.R:44:4
   2. | \-testthat:::expect_condition_matching(...)
   3. |   \-testthat:::quasi_capture(...)
   4. |     +-testthat .capture(...)
   5. |     | \-base::withCallingHandlers(...)
   6. |     \-rlang::eval_bare(quo_get_expr(.quo), quo_get_env(.quo))
   7. \-cfid::dag("x -> z -> y; x <-> y")
   8.   \-cfid:::reg_match(x, "\\{([^<>\\-]+)\\}|([^<> \\-]+)|(<->|<-|->)")
  -- Failure (test-graphs.R:45:5): allowed structures ----------------------------
  `dag("{x, y, z} -> w")` threw an unexpected error.
  Message: could not find function "gregexec"
  Class:   simpleError/error/condition
  Backtrace:
      x
   1. +-testthat::expect_error(dag("{x, y, z} -> w"), NA) at test-graphs.R:45:4
   2. | \-testthat:::expect_condition_matching(...)
   3. |   \-testthat:::quasi_capture(...)
   4. |     +-testthat .capture(...)
   5. |     | \-base::withCallingHandlers(...)
   6. |     \-rlang::eval_bare(quo_get_expr(.quo), quo_get_env(.quo))
   7. \-cfid::dag("{x, y, z} -> w")
   8.   \-cfid:::reg_match(x, "\\{([^<>\\-]+)\\}|([^<> \\-]+)|(<->|<-|->)")
  -- Failure (test-graphs.R:46:5): allowed structures ----------------------------
  `dag("z -> w\nx -> y")` threw an unexpected error.
  Message: could not find function "gregexec"
  Class:   simpleError/error/condition
  Backtrace:
      x
   1. +-testthat::expect_error(dag("z -> w\nx -> y"), NA) at test-graphs.R:46:4
   2. | \-testthat:::expect_condition_matching(...)
   3. |   \-testthat:::quasi_capture(...)
   4. |     +-testthat .capture(...)
   5. |     | \-base::withCallingHandlers(...)
   6. |     \-rlang::eval_bare(quo_get_expr(.quo), quo_get_env(.quo))
   7. \-cfid::dag("z -> w\nx -> y")
   8.   \-cfid:::reg_match(x, "\\{([^<>\\-]+)\\}|([^<> \\-]+)|(<->|<-|->)")
  -- Error (test-graphs.R:51:1): (code run outside of `test_that()`) -------------
  Error in `gregexec(pattern, x, perl)`: could not find function "gregexec"
  Backtrace:
      x
   1. \-cfid::dag("X -> W -> Y <- Z <- D X <-> Y") at test-graphs.R:51:0
   2.   \-cfid:::reg_match(x, "\\{([^<>\\-]+)\\}|([^<> \\-]+)|(<->|<-|->)")
  -- Error (test-probability.R:13:1): (code run outside of `test_that()`) --------
  Error in `gregexec(pattern, x, perl)`: could not find function "gregexec"
  Backtrace:
      x
   1. \-cfid::dag("X -> W -> Y <- Z <- D X <-> Y") at test-probability.R:13:0
   2.   \-cfid:::reg_match(x, "\\{([^<>\\-]+)\\}|([^<> \\-]+)|(<->|<-|->)")
  
  [ FAIL 12 | WARN 1 | SKIP 0 | PASS 38 ]
  Error: Test failures
  Execution halted
* checking PDF version of manual ... OK
* DONE
Status: 2 ERRORs, 1 NOTE