* using log directory ‘/srv/hornik/tmp/CRAN_pretest/pam.Rcheck’
* using R Under development (unstable) (2025-07-28 r88462)
* using platform: x86_64-pc-linux-gnu
* R was compiled by
    Debian clang version 19.1.7 (3)
    Debian flang-new version 19.1.7 (3)
* running under: Debian GNU/Linux 13 (trixie)
* using session charset: UTF-8
* checking for file ‘pam/DESCRIPTION’ ... OK
* checking extension type ... Package
* this is package ‘pam’ version ‘1.0.3’
* package encoding: UTF-8
* checking CRAN incoming feasibility ... [4s/6s] OK
* 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 executable files ... OK
* checking for hidden files and directories ... OK
* checking for portable file names ... OK
* checking for sufficient/correct file permissions ... OK
* checking serialization versions ... OK
* checking whether package ‘pam’ can be installed ... [1s/1s] OK
* checking package directory ... OK
* checking for future file timestamps ... 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 code files for non-ASCII characters ... OK
* checking R files for syntax errors ... OK
* checking whether the package can be loaded ... [0s/0s] OK
* checking whether the package can be loaded with stated dependencies ... [0s/0s] OK
* checking whether the package can be unloaded cleanly ... [0s/0s] OK
* checking whether the namespace can be loaded with stated dependencies ... [0s/0s] OK
* checking whether the namespace can be unloaded cleanly ... [0s/0s] OK
* checking loading without being on the library search path ... [0s/0s] 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 ... [3s/3s] OK
* checking Rd files ... [0s/0s] OK
* checking Rd metadata ... OK
* checking Rd line widths ... 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 ... [3s/3s] OK
* checking for unstated dependencies in ‘tests’ ... OK
* checking tests ... [9s/9s] ERROR
  Running ‘testthat.R’ [9s/9s]
Running the tests in ‘tests/testthat.R’ failed.
Complete output:
  > # This file is part of the standard setup for testthat.
  > # It is recommended that you do not modify it.
  > #
  > # Where should you do additional test configuration?
  > # Learn more about the roles of various files in:
  > # * https://r-pkgs.org/testing-design.html#sec-tests-files-overview
  > # * https://testthat.r-lib.org/articles/special-files.html
  > 
  > library(testthat)
  > library(pam)
  > 
  > test_check("pam")
  [ FAIL 21 | WARN 4 | SKIP 0 | PASS 21 ]
  
  ══ Failed tests ════════════════════════════════════════════════════════════════
  ── Error ('test-compare_regression_models_etr_I.R:11:5'): compare_regression_models etr I ──
  Error in `if (grepl("ubuntu", distro) || grepl("debian", distro)) {
      expect_no_error({
          model_points_etr_I <- compare_regression_models_ETR_I(test_data_dir)
      })
      expect_equal(model_points_etr_I[["eilers_peeters"]], 13)
      expect_equal(model_points_etr_I[["platt"]], 16)
      expect_equal(model_points_etr_I[["vollenweider"]], 30)
      expect_equal(model_points_etr_I[["walsby"]], 19)
  } else {
      skip(paste("Skipping test on unsupported Linux distribution:", 
          distro))
  }`: missing value where TRUE/FALSE needed
  ── Error ('test-compare_regression_models_etr_II.R:11:5'): compare_regression_models etr II ──
  Error in `if (grepl("ubuntu", distro) || grepl("debian", distro)) {
      expect_no_error({
          model_points_etr_II <- compare_regression_models_ETR_II(test_data_dir)
      })
      expect_equal(model_points_etr_II[["eilers_peeters"]], 41)
      expect_equal(model_points_etr_II[["platt"]], 24)
      expect_equal(model_points_etr_II[["vollenweider"]], 40)
      expect_equal(model_points_etr_II[["walsby"]], 9)
  } else {
      skip(paste("Skipping test on unsupported Linux distribution:", 
          distro))
  }`: missing value where TRUE/FALSE needed
  ── Error ('test-compare_regression_models_total.R:10:5'): compare_regression_models etr I + II ──
  Error in `if (grepl("ubuntu", distro) || grepl("debian", distro)) {
      expect_no_error({
          model_points_etr_I <- compare_regression_models_ETR_I(test_data_dir)
          model_points_etr_II <- compare_regression_models_ETR_II(test_data_dir)
          eilers_peeters_total <- model_points_etr_I[["eilers_peeters"]] + 
              model_points_etr_II[["eilers_peeters"]]
          platt_total <- model_points_etr_I[["platt"]] + model_points_etr_II[["platt"]]
          vollenweider_total <- model_points_etr_I[["vollenweider"]] + 
              model_points_etr_II[["vollenweider"]]
          walsby_total <- model_points_etr_I[["walsby"]] + model_points_etr_II[["walsby"]]
          result <- c(eilers_peeters_total = eilers_peeters_total, 
              platt_total = platt_total, vollenweider_total = vollenweider_total, 
              walsby_total = walsby_total)
      })
      expect_equal(result[["eilers_peeters_total"]], 54)
      expect_equal(result[["platt_total"]], 40)
      expect_equal(result[["vollenweider_total"]], 70)
      expect_equal(result[["walsby_total"]], 28)
  } else {
      skip(paste("Skipping test on unsupported Linux distribution:", 
          distro))
  }`: missing value where TRUE/FALSE needed
  ── Error ('test-eilers_peeters_etr_I.R:13:5'): test-eilers_peeters_etr_I generate regression 20240925.csv ──
  Error in `if (grepl("ubuntu", distro) || grepl("debian", distro)) {
      expect_equal(model_result[["sdiff"]], 53.4454062)
      expect_equal(model_result[["c"]], 2.8984079)
      expect_equal(model_result[["pm"]], 151.851986)
      expect_equal(model_result[["s"]], 0.345017)
      expect_equal(model_result[["ik"]], 440.1289906)
      expect_equal(model_result[["im"]], 1399.76963)
      expect_equal(model_result[["w"]], 1.180362267)
  } else {
      skip(paste("Skipping test on unsupported Linux distribution:", 
          distro))
  }`: missing value where TRUE/FALSE needed
  ── Error ('test-eilers_peeters_etr_I.R:74:5'): test-eilers_peeters_etr_I generate regression modified 20240925.csv ──
  Error in `if (grepl("ubuntu", distro) || grepl("debian", distro)) {
      expect_equal(model_result[["sdiff"]], 53.4454062)
      expect_equal(model_result[["c"]], 2.8984079)
      expect_equal(model_result[["d"]], NA_real_)
      expect_equal(model_result[["alpha"]], 0.345017)
      expect_equal(model_result[["beta"]], NA_real_)
      expect_equal(model_result[["etrmax_with_photoinhibition"]], 
          151.851986)
      expect_equal(model_result[["etrmax_without_photoinhibition"]], 
          NA_real_)
      expect_equal(model_result[["ik_with_photoinhibition"]], 440.1289906)
      expect_equal(model_result[["ik_without_photoinhibition"]], 
          NA_real_)
      expect_equal(model_result[["im_with_photoinhibition"]], 1399.76963)
      expect_equal(model_result[["w"]], 1.180362267)
      expect_equal(model_result[["ib"]], NA_real_)
      expect_equal(model_result[["etrmax_with_without_ratio"]], 
          NA_real_)
  } else {
      skip(paste("Skipping test on unsupported Linux distribution:", 
          distro))
  }`: missing value where TRUE/FALSE needed
  ── Error ('test-eilers_peeters_etr_II.R:13:5'): test-eilers_peeters_etr_II generate regression 20240925.csv ──
  Error in `if (grepl("ubuntu", distro) || grepl("debian", distro)) {
      expect_equal(model_result[["sdiff"]], 5.7818334)
      expect_equal(model_result[["c"]], 6.1088971)
      expect_equal(model_result[["pm"]], 44.5224748)
      expect_equal(model_result[["s"]], 0.16369567)
      expect_equal(model_result[["ik"]], 271.98322)
      expect_equal(model_result[["im"]], 731.801329)
      expect_equal(model_result[["w"]], 0.690612084)
  } else {
      skip(paste("Skipping test on unsupported Linux distribution:", 
          distro))
  }`: missing value where TRUE/FALSE needed
  ── Error ('test-eilers_peeters_etr_II.R:57:5'): test-eilers_peeters_etr_II modified 20240925.csv ──
  Error in `if (grepl("ubuntu", distro) || grepl("debian", distro)) {
      expect_equal(model_result[["sdiff"]], 5.7818334)
      expect_equal(model_result[["c"]], 6.1088971)
      expect_equal(model_result[["d"]], NA_real_)
      expect_equal(model_result[["alpha"]], 0.16369567)
      expect_equal(model_result[["beta"]], NA_real_)
      expect_equal(model_result[["etrmax_with_photoinhibition"]], 
          44.5224748)
      expect_equal(model_result[["etrmax_without_photoinhibition"]], 
          NA_real_)
      expect_equal(model_result[["ik_with_photoinhibition"]], 271.98322)
      expect_equal(model_result[["ik_without_photoinhibition"]], 
          NA_real_)
      expect_equal(model_result[["im_with_photoinhibition"]], 731.801329)
      expect_equal(model_result[["w"]], 0.690612084)
      expect_equal(model_result[["ib"]], NA_real_)
      expect_equal(model_result[["etrmax_with_without_ratio"]], 
          NA_real_)
  } else {
      skip(paste("Skipping test on unsupported Linux distribution:", 
          distro))
  }`: missing value where TRUE/FALSE needed
  ── Error ('test-eilers_peeters_etr_II_junior_pam.R:13:5'): test-eilers_peeters_etr_II generate regression junior_pam_20250613.csv.csv ──
  Error in `if (grepl("ubuntu", distro) || grepl("debian", distro)) {
      expect_equal(model_result[["sdiff"]], 18.5975058)
      expect_equal(model_result[["b"]], 0.01213671)
      expect_equal(model_result[["c"]], 2.77837046)
      expect_equal(model_result[["pm"]], 61.1793644)
      expect_equal(model_result[["s"]], 0.3599232)
      expect_equal(model_result[["ik"]], 169.978939)
      expect_equal(model_result[["im"]], 1320.3078)
      expect_equal(model_result[["w"]], 5.7674788)
  } else {
      skip(paste("Skipping test on unsupported Linux distribution:", 
          distro))
  }`: missing value where TRUE/FALSE needed
  ── Error ('test-eilers_peeters_etr_II_junior_pam.R:57:5'): test-eilers_peeters_etr_II junior_pam_20250613.csv.csv ──
  Error in `if (grepl("ubuntu", distro) || grepl("debian", distro)) {
      expect_equal(model_result[["sdiff"]], 18.5975058)
      expect_equal(model_result[["b"]], 0.01213671)
      expect_equal(model_result[["c"]], 2.77837046)
      expect_equal(model_result[["d"]], NA_real_)
      expect_equal(model_result[["alpha"]], 0.3599232)
      expect_equal(model_result[["beta"]], NA_real_)
      expect_equal(model_result[["etrmax_with_photoinhibition"]], 
          61.1793644)
      expect_equal(model_result[["etrmax_without_photoinhibition"]], 
          NA_real_)
      expect_equal(model_result[["ik_with_photoinhibition"]], 169.978939)
      expect_equal(model_result[["ik_without_photoinhibition"]], 
          NA_real_)
      expect_equal(model_result[["im_with_photoinhibition"]], 1320.3078)
      expect_equal(model_result[["w"]], 5.7674788)
      expect_equal(model_result[["ib"]], NA_real_)
      expect_equal(model_result[["etrmax_with_without_ratio"]], 
          NA_real_)
  } else {
      skip(paste("Skipping test on unsupported Linux distribution:", 
          distro))
  }`: missing value where TRUE/FALSE needed
  ── Error ('test-platt_etr_I.R:13:5'): test-platt_etr_I generate regression 20240925.csv ──
  Error in `if (grepl("ubuntu", distro) || grepl("debian", distro)) {
      expect_equal(model_result[["sdiff"]], 55.4812913)
      expect_equal(model_result[["alpha"]], 0.35079243)
      expect_equal(model_result[["beta"]], 0.05625881)
      expect_equal(model_result[["ps"]], 242.02871)
      expect_equal(model_result[["pm"]], 151.85573)
      expect_equal(model_result[["ik"]], 432.8934096)
      expect_equal(model_result[["is"]], 689.94849)
      expect_equal(model_result[["ib"]], 4302.05878)
      expect_equal(model_result[["im"]], 1365.3918)
  } else {
      skip(paste("Skipping test on unsupported Linux distribution:", 
          distro))
  }`: missing value where TRUE/FALSE needed
  ── Error ('test-platt_etr_I.R:54:5'): test-platt_etr_I generate regression modified 20240925.csv ──
  Error in `if (grepl("ubuntu", distro) || grepl("debian", distro)) {
      expect_equal(model_result[["sdiff"]], 55.4812913)
      expect_equal(model_result[["a"]], 242.02871)
      expect_equal(model_result[["b"]], 0.35079243)
      expect_equal(model_result[["c"]], 0.05625881)
      expect_equal(model_result[["d"]], NA_real_)
      expect_equal(model_result[["alpha"]], 0.35079243)
      expect_equal(model_result[["beta"]], 0.05625881)
      expect_equal(model_result[["etrmax_with_photoinhibition"]], 
          151.85573)
      expect_equal(model_result[["etrmax_without_photoinhibition"]], 
          242.02871)
      expect_equal(model_result[["ik_with_photoinhibition"]], 432.8934096)
      expect_equal(model_result[["ik_without_photoinhibition"]], 
          689.94849)
      expect_equal(model_result[["im_with_photoinhibition"]], 1365.3918)
      expect_equal(model_result[["w"]], NA_real_)
      expect_equal(model_result[["ib"]], 4302.05878)
      expect_equal(model_result[["etrmax_with_without_ratio"]], 
          1.593806867)
  } else {
      skip(paste("Skipping test on unsupported Linux distribution:", 
          distro))
  }`: missing value where TRUE/FALSE needed
  ── Error ('test-platt_etr_II.R:13:5'): test-platt_etr_II generate regression 20240925.csv ──
  Error in `if (grepl("ubuntu", distro) || grepl("debian", distro)) {
      expect_equal(model_result[["sdiff"]], 12.0348133)
      expect_equal(model_result[["alpha"]], 0.178182825)
      expect_equal(model_result[["beta"]], 0.035606479)
      expect_equal(model_result[["ps"]], 76.53219)
      expect_equal(model_result[["pm"]], 44.5824637)
      expect_equal(model_result[["ik"]], 250.2062903)
      expect_equal(model_result[["is"]], 429.514971)
      expect_equal(model_result[["ib"]], 2149.38944)
      expect_equal(model_result[["im"]], 769.88984)
  } else {
      skip(paste("Skipping test on unsupported Linux distribution:", 
          distro))
  }`: missing value where TRUE/FALSE needed
  ── Error ('test-platt_etr_II.R:71:5'): test-platt_etr_II generate regression modified 20240925.csv ──
  Error in `if (grepl("ubuntu", distro) || grepl("debian", distro)) {
      expect_equal(model_result[["sdiff"]], 12.0348133)
      expect_equal(model_result[["a"]], 76.53219)
      expect_equal(model_result[["b"]], 0.178182825)
      expect_equal(model_result[["c"]], 0.035606479)
      expect_equal(model_result[["d"]], NA_real_)
      expect_equal(model_result[["alpha"]], 0.178182825)
      expect_equal(model_result[["beta"]], 0.035606479)
      expect_equal(model_result[["etrmax_with_photoinhibition"]], 
          44.5824637)
      expect_equal(model_result[["etrmax_without_photoinhibition"]], 
          76.53219)
      expect_equal(model_result[["ik_with_photoinhibition"]], 250.2062903)
      expect_equal(model_result[["ik_without_photoinhibition"]], 
          429.514971)
      expect_equal(model_result[["im_with_photoinhibition"]], 769.88984)
      expect_equal(model_result[["w"]], NA_real_)
      expect_equal(model_result[["ib"]], 2149.38944)
      expect_equal(model_result[["etrmax_with_without_ratio"]], 
          1.71664337)
  } else {
      skip(paste("Skipping test on unsupported Linux distribution:", 
          distro))
  }`: missing value where TRUE/FALSE needed
  ── Error ('test-vollenweider_etr_I.R:13:5'): test-vollenweider_etr_I generate regression 20240925.csv ──
  Error in `if (grepl("ubuntu", distro) || grepl("debian", distro)) {
      expect_equal(model_result[["sdiff"]], 57.4445851)
      expect_equal(model_result[["pmax"]], 165.46686)
      expect_equal(model_result[["n"]], 34.8365884)
      expect_equal(model_result[["ik"]], 536.24749)
      expect_equal(model_result[["popt"]], 153.09957)
      expect_equal(model_result[["iik"]], 496.16738)
      expect_equal(model_result[["pmax_popt_and_ik_iik_ratio"]], 
          1.08077941)
  } else {
      skip(paste("Skipping test on unsupported Linux distribution:", 
          distro))
  }`: missing value where TRUE/FALSE needed
  ── Error ('test-vollenweider_etr_I.R:71:5'): test-vollenweider_etr_I generate regression modified 20240925.csv ──
  Error in `if (grepl("ubuntu", distro) || grepl("debian", distro)) {
      expect_equal(model_result[["sdiff"]], 57.4445851)
      expect_equal(model_result[["a"]], 165.46686)
      expect_equal(model_result[["d"]], 34.8365884)
      expect_equal(model_result[["alpha"]], 0.30856436)
      expect_equal(model_result[["beta"]], NA_real_)
      expect_equal(model_result[["etrmax_with_photoinhibition"]], 
          153.09957)
      expect_equal(model_result[["etrmax_without_photoinhibition"]], 
          165.46686)
      expect_equal(model_result[["ik_with_photoinhibition"]], 496.16738)
      expect_equal(model_result[["ik_without_photoinhibition"]], 
          536.24749)
      expect_equal(model_result[["im_with_photoinhibition"]], 1420)
      expect_equal(model_result[["w"]], NA_real_)
      expect_equal(model_result[["ib"]], NA_real_)
      expect_equal(model_result[["etrmax_with_without_ratio"]], 
          1.08077941)
  } else {
      skip(paste("Skipping test on unsupported Linux distribution:", 
          distro))
  }`: missing value where TRUE/FALSE needed
  ── Error ('test-vollenweider_etr_II.R:13:5'): test-vollenweider_etr_II generate regression 20240925.csv ──
  Error in `if (grepl("ubuntu", distro) || grepl("debian", distro)) {
      expect_equal(model_result[["sdiff"]], 2.5104818)
      expect_equal(model_result[["pmax"]], 53.404027)
      expect_equal(model_result[["n"]], 2.34641)
      expect_equal(model_result[["ik"]], 351.3752)
      expect_equal(model_result[["popt"]], 44.16714)
      expect_equal(model_result[["iik"]], 290.60051)
      expect_equal(model_result[["pmax_popt_and_ik_iik_ratio"]], 
          1.209134835)
  } else {
      skip(paste("Skipping test on unsupported Linux distribution:", 
          distro))
  }`: missing value where TRUE/FALSE needed
  ── Error ('test-vollenweider_etr_II.R:71:5'): test-vollenweider_etr_II generate regression modified 20240925.csv ──
  Error in `if (grepl("ubuntu", distro) || grepl("debian", distro)) {
      expect_equal(model_result[["sdiff"]], 2.5104818)
      expect_equal(model_result[["a"]], 53.404027)
      expect_equal(model_result[["d"]], 2.34641)
      expect_equal(model_result[["alpha"]], 0.15198576)
      expect_equal(model_result[["beta"]], NA_real_)
      expect_equal(model_result[["etrmax_with_photoinhibition"]], 
          44.16714)
      expect_equal(model_result[["etrmax_without_photoinhibition"]], 
          53.404027)
      expect_equal(model_result[["ik_with_photoinhibition"]], 290.60051)
      expect_equal(model_result[["ik_without_photoinhibition"]], 
          351.3752)
      expect_equal(model_result[["im_with_photoinhibition"]], 757)
      expect_equal(model_result[["w"]], NA_real_)
      expect_equal(model_result[["ib"]], NA_real_)
      expect_equal(model_result[["etrmax_with_without_ratio"]], 
          1.209134835)
  } else {
      skip(paste("Skipping test on unsupported Linux distribution:", 
          distro))
  }`: missing value where TRUE/FALSE needed
  ── Error ('test-walsby_etr_I.R:13:5'): test-walsby_etr_I generate regression 20240925.csv ──
  Error in `if (grepl("ubuntu", distro) || grepl("debian", distro)) {
      expect_equal(model_result[["sdiff"]], 55.5823146)
      expect_equal(model_result[["etr_max"]], 221.23782)
      expect_equal(model_result[["alpha"]], 0.387249932)
      expect_equal(model_result[["beta"]], -0.035964253)
  } else {
      skip(paste("Skipping test on unsupported Linux distribution:", 
          distro))
  }`: missing value where TRUE/FALSE needed
  ── Error ('test-walsby_etr_I.R:61:5'): test-walsby_etr_I generate regression modified 20240925.csv ──
  Error in `if (grepl("ubuntu", distro) || grepl("debian", distro)) {
      expect_equal(model_result[["sdiff"]], 55.5823146)
      expect_equal(model_result[["a"]], 221.23782)
      expect_equal(model_result[["b"]], 0.387249932)
      expect_equal(model_result[["c"]], -0.035964253)
      expect_equal(model_result[["d"]], NA_real_)
      expect_equal(model_result[["alpha"]], 0.387249932)
      expect_equal(model_result[["beta"]], -0.035964253)
      expect_equal(model_result[["etrmax_with_photoinhibition"]], 
          151.8614464)
      expect_equal(model_result[["etrmax_without_photoinhibition"]], 
          221.23782)
      expect_equal(model_result[["ik_with_photoinhibition"]], 392.15358)
      expect_equal(model_result[["ik_without_photoinhibition"]], 
          571.305)
      expect_equal(model_result[["im_with_photoinhibition"]], 1358)
      expect_equal(model_result[["w"]], NA_real_)
      expect_equal(model_result[["ib"]], NA_real_)
      expect_equal(model_result[["etrmax_with_without_ratio"]], 
          1.456839939)
  } else {
      skip(paste("Skipping test on unsupported Linux distribution:", 
          distro))
  }`: missing value where TRUE/FALSE needed
  ── Error ('test-walsby_etr_II.R:13:5'): test-walsby_etr_II generate regression 20240925.csv ──
  Error in `if (grepl("ubuntu", distro) || grepl("debian", distro)) {
      expect_equal(model_result[["sdiff"]], 13.3218134)
      expect_equal(model_result[["etr_max"]], 64.6205229)
      expect_equal(model_result[["alpha"]], 0.19796623)
      expect_equal(model_result[["beta"]], -0.018109036)
  } else {
      skip(paste("Skipping test on unsupported Linux distribution:", 
          distro))
  }`: missing value where TRUE/FALSE needed
  ── Error ('test-walsby_etr_II.R:61:5'): test-walsby_etr_II generate regression modified 20240925.csv ──
  Error in `if (grepl("ubuntu", distro) || grepl("debian", distro)) {
      expect_equal(model_result[["sdiff"]], 13.3218134)
      expect_equal(model_result[["a"]], 64.6205229)
      expect_equal(model_result[["b"]], 0.19796623)
      expect_equal(model_result[["c"]], -0.018109036)
      expect_equal(model_result[["d"]], NA_real_)
      expect_equal(model_result[["alpha"]], 0.19796623)
      expect_equal(model_result[["beta"]], -0.018109036)
      expect_equal(model_result[["etrmax_with_photoinhibition"]], 
          44.5716344)
      expect_equal(model_result[["etrmax_without_photoinhibition"]], 
          64.6205229)
      expect_equal(model_result[["ik_with_photoinhibition"]], 225.14766)
      expect_equal(model_result[["ik_without_photoinhibition"]], 
          326.421945)
      expect_equal(model_result[["im_with_photoinhibition"]], 781)
      expect_equal(model_result[["w"]], NA_real_)
      expect_equal(model_result[["ib"]], NA_real_)
      expect_equal(model_result[["etrmax_with_without_ratio"]], 
          1.449812727)
  } else {
      skip(paste("Skipping test on unsupported Linux distribution:", 
          distro))
  }`: missing value where TRUE/FALSE needed
  
  [ FAIL 21 | WARN 4 | SKIP 0 | PASS 21 ]
  Error: Test failures
  Execution halted
* checking PDF version of manual ... [3s/3s] OK
* checking HTML version of manual ... [1s/1s] OK
* checking for non-standard things in the check directory ... OK
* checking for detritus in the temp directory ... OK
* DONE
Status: 1 ERROR