R Under development (unstable) (2024-10-28 r87274 ucrt) -- "Unsuffered Consequences"
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Platform: x86_64-w64-mingw32/x64

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> source("incl/start.R")
> 
> message("handlers() ...")
handlers() ...
> 
> hs <- handlers()
> print(hs)
[[1]]
function (char = "=", style = 3L, file = stderr(), intrusiveness = getOption("progressr.intrusiveness.terminal", 
    1), target = "terminal", ...) 
{
    backend_args <- handler_backend_args(char = char, style = style, 
        ...)
    reporter <- local({
        pb <- NULL
        make_pb <- function(max, ...) {
            if (!is.null(pb)) 
                return(pb)
            args <- c(list(max = max, ...), backend_args)
            pb <<- do.call(txtProgressBar2, args = args)
            pb
        }
        list(reset = function(...) {
            pb <<- NULL
        }, hide = function(...) {
            if (is.null(pb)) return()
            eraseTxtProgressBar(pb)
        }, unhide = function(...) {
            if (is.null(pb)) return()
            redrawTxtProgressBar(pb)
        }, interrupt = function(config, state, progression, ...) {
            if (is.null(pb)) return()
            eraseTxtProgressBar(pb)
            redrawTxtProgressBar(pb)
            msg <- conditionMessage(progression)
            msg <- paste(c("", msg, ""), collapse = "\n")
            cat(msg, file = file)
        }, initiate = function(config, state, progression, ...) {
            if (!state$enabled || config$times == 1L) return()
            stop_if_not(is.null(pb))
            make_pb(max = config$max_steps, file = file)
        }, update = function(config, state, progression, ...) {
            if (!state$enabled || config$times == 1L) return()
            make_pb(max = config$max_steps, file = file)
            if (inherits(progression, "sticky")) {
                eraseTxtProgressBar(pb)
                message(paste0(state$message, ""))
                redrawTxtProgressBar(pb)
            }
            if (progression$amount == 0) return()
            setTxtProgressBar(pb, value = state$step)
        }, finish = function(config, state, progression, ...) {
            if (is.null(pb)) return()
            if (!state$enabled) return()
            if (config$clear) {
                eraseTxtProgressBar(pb)
                pb_env <- environment(pb$getVal)
                file <- pb_env$file
                pb_env$file <- tempfile()
                on.exit({
                  if (file_test("-f", pb_env$file)) file.remove(pb_env$file)
                  pb_env$file <- file
                })
            } else {
                setTxtProgressBar(pb, value = config$max_steps)
            }
            close(pb)
            pb <<- NULL
        })
    })
    make_progression_handler("txtprogressbar", reporter, intrusiveness = intrusiveness, 
        target = target, ...)
}
<bytecode: 0x000002633230d140>
<environment: namespace:progressr>

> 
> for (kk in seq_along(hs)) {
+   h <- hs[[kk]]
+   print(h)
+   handler <- h()
+   print(handler)
+ }
function (char = "=", style = 3L, file = stderr(), intrusiveness = getOption("progressr.intrusiveness.terminal", 
    1), target = "terminal", ...) 
{
    backend_args <- handler_backend_args(char = char, style = style, 
        ...)
    reporter <- local({
        pb <- NULL
        make_pb <- function(max, ...) {
            if (!is.null(pb)) 
                return(pb)
            args <- c(list(max = max, ...), backend_args)
            pb <<- do.call(txtProgressBar2, args = args)
            pb
        }
        list(reset = function(...) {
            pb <<- NULL
        }, hide = function(...) {
            if (is.null(pb)) return()
            eraseTxtProgressBar(pb)
        }, unhide = function(...) {
            if (is.null(pb)) return()
            redrawTxtProgressBar(pb)
        }, interrupt = function(config, state, progression, ...) {
            if (is.null(pb)) return()
            eraseTxtProgressBar(pb)
            redrawTxtProgressBar(pb)
            msg <- conditionMessage(progression)
            msg <- paste(c("", msg, ""), collapse = "\n")
            cat(msg, file = file)
        }, initiate = function(config, state, progression, ...) {
            if (!state$enabled || config$times == 1L) return()
            stop_if_not(is.null(pb))
            make_pb(max = config$max_steps, file = file)
        }, update = function(config, state, progression, ...) {
            if (!state$enabled || config$times == 1L) return()
            make_pb(max = config$max_steps, file = file)
            if (inherits(progression, "sticky")) {
                eraseTxtProgressBar(pb)
                message(paste0(state$message, ""))
                redrawTxtProgressBar(pb)
            }
            if (progression$amount == 0) return()
            setTxtProgressBar(pb, value = state$step)
        }, finish = function(config, state, progression, ...) {
            if (is.null(pb)) return()
            if (!state$enabled) return()
            if (config$clear) {
                eraseTxtProgressBar(pb)
                pb_env <- environment(pb$getVal)
                file <- pb_env$file
                pb_env$file <- tempfile()
                on.exit({
                  if (file_test("-f", pb_env$file)) file.remove(pb_env$file)
                  pb_env$file <- file
                })
            } else {
                setTxtProgressBar(pb, value = config$max_steps)
            }
            close(pb)
            pb <<- NULL
        })
    })
    make_progression_handler("txtprogressbar", reporter, intrusiveness = intrusiveness, 
        target = target, ...)
}
<bytecode: 0x000002633230d140>
<environment: namespace:progressr>
[[1]]
print(handler)

[[2]]
print.progression_handler(handler)

Progression calling handler of class 'txtprogressbar_progression_handler':
 * configuration:
   - name: 'txtprogressbar'
   - max_steps: <NULL>
   - enable: TRUE
   - enable_after: 0 seconds
   - times: Inf
   - interval: 0.1 seconds
   - intrusiveness: 1
   - auto_finish: TRUE
   - clear: TRUE
   - target: 'terminal'
   - milestones: <NULL>
   - owner: <NULL>
 * state:
   - enabled: FALSE
   - finished: FALSE
   - step: <NULL>
   - message: <NULL>
   - prev_milestone: <NULL>
   - timestamps: <NULL>
> 
> 
> hs <- handlers("txtprogressbar")
> print(hs)
list()
> 
> for (kk in seq_along(hs)) {
+   h <- hs[[kk]]
+   print(h)
+   handler <- h()
+   print(handler)
+ }
> 
> hs <- handlers("handler_txtprogressbar")
> print(hs)
$txtprogressbar
function (char = "=", style = 3L, file = stderr(), intrusiveness = getOption("progressr.intrusiveness.terminal", 
    1), target = "terminal", ...) 
{
    backend_args <- handler_backend_args(char = char, style = style, 
        ...)
    reporter <- local({
        pb <- NULL
        make_pb <- function(max, ...) {
            if (!is.null(pb)) 
                return(pb)
            args <- c(list(max = max, ...), backend_args)
            pb <<- do.call(txtProgressBar2, args = args)
            pb
        }
        list(reset = function(...) {
            pb <<- NULL
        }, hide = function(...) {
            if (is.null(pb)) return()
            eraseTxtProgressBar(pb)
        }, unhide = function(...) {
            if (is.null(pb)) return()
            redrawTxtProgressBar(pb)
        }, interrupt = function(config, state, progression, ...) {
            if (is.null(pb)) return()
            eraseTxtProgressBar(pb)
            redrawTxtProgressBar(pb)
            msg <- conditionMessage(progression)
            msg <- paste(c("", msg, ""), collapse = "\n")
            cat(msg, file = file)
        }, initiate = function(config, state, progression, ...) {
            if (!state$enabled || config$times == 1L) return()
            stop_if_not(is.null(pb))
            make_pb(max = config$max_steps, file = file)
        }, update = function(config, state, progression, ...) {
            if (!state$enabled || config$times == 1L) return()
            make_pb(max = config$max_steps, file = file)
            if (inherits(progression, "sticky")) {
                eraseTxtProgressBar(pb)
                message(paste0(state$message, ""))
                redrawTxtProgressBar(pb)
            }
            if (progression$amount == 0) return()
            setTxtProgressBar(pb, value = state$step)
        }, finish = function(config, state, progression, ...) {
            if (is.null(pb)) return()
            if (!state$enabled) return()
            if (config$clear) {
                eraseTxtProgressBar(pb)
                pb_env <- environment(pb$getVal)
                file <- pb_env$file
                pb_env$file <- tempfile()
                on.exit({
                  if (file_test("-f", pb_env$file)) file.remove(pb_env$file)
                  pb_env$file <- file
                })
            } else {
                setTxtProgressBar(pb, value = config$max_steps)
            }
            close(pb)
            pb <<- NULL
        })
    })
    make_progression_handler("txtprogressbar", reporter, intrusiveness = intrusiveness, 
        target = target, ...)
}
<bytecode: 0x000002633230d140>
<environment: namespace:progressr>

> 
> message("handlers() - exceptions ...")
handlers() - exceptions ...
> 
> ## Will as a side-effect set an empty list of handlers()
> res <- handlers("non-existing-handler", on_missing = "ignore")
> res <- handlers()
> stopifnot(is.list(res), length(res) == 0L)
> 
> res <- tryCatch({
+   handlers("non-existing-handler", on_missing = "warning")
+ }, warning = identity)
> stopifnot(inherits(res, "warning"))
> 
> res <- tryCatch({
+   handlers("non-existing-handler", on_missing = "error")
+ }, error = identity)
> stopifnot(inherits(res, "error"))
> 
> 
> message("handlers() - exceptions ... DONE")
handlers() - exceptions ... DONE
> 
> message("handlers() ... DONE")
handlers() ... DONE
> 
> source("incl/end.R")
Failed to undo environment variables:
 - Expected environment variables: [n=201] '!ExitCode', 'ALLUSERSPROFILE', 'APPDATA', 'BIBINPUTS', 'BINDIR', 'BSTINPUTS', 'COMMONPROGRAMFILES', 'COMPUTERNAME', 'COMSPEC', 'CURL_CA_BUNDLE', 'CYGWIN', 'CommonProgramFiles(x86)', 'CommonProgramW6432', 'DriverData', 'HOME', 'HOMEDRIVE', 'HOMEPATH', 'JAGS_ROOT', 'JAVA_HOME', 'LANGUAGE', 'LC_COLLATE', 'LC_MONETARY', 'LC_TIME', 'LOCALAPPDATA', 'LOGONSERVER', 'LS_HOME', 'LS_LICENSE_PATH', 'MAKE', 'MAKEFLAGS', 'MAKELEVEL', 'MFLAGS', 'MSMPI_BENCHMARKS', 'MSMPI_BIN', 'MSYS2_ENV_CONV_EXCL', 'NUMBER_OF_PROCESSORS', 'OCL', 'OMP_THREAD_LIMIT', 'OS', 'PATH', 'PATHEXT', 'PROCESSOR_ARCHITECTURE', 'PROCESSOR_IDENTIFIER', 'PROCESSOR_LEVEL', 'PROCESSOR_REVISION', 'PROGRAMFILES', 'PROMPT', 'PSModulePath', 'PUBLIC', 'PWD', 'ProgramData', 'ProgramFiles(x86)', 'ProgramW6432', 'RTOOLS43_HOME', 'RTOOLS44_HOME', 'R_ARCH', 'R_BROWSER', 'R_BZIPCMD', 'R_CMD', 'R_COMPILED_BY', 'R_CRAN_WEB', 'R_CUSTOM_TOOLS_PATH', 'R_CUSTOM_TOOLS_SOFT', 'R_DOC_DIR', 'R_ENVIRON_USER', 'R_GSCMD', 'R_GZIPCMD', 'R_HOME', 'R_INCLUDE_DIR', 'R_INSTALL_TAR', 'R_LIBS', 'R_LIBS_SITE', 'R_LIBS_USER', 'R_MAX_NUM_DLLS', 'R_OSTYPE', 'R_PAPERSIZE', 'R_PAPERSIZE_USER', 'R_PARALLEL_PORT', 'R_RD4PDF', 'R_RTOOLS44_PATH', 'R_SCRIPT_LEGACY', 'R_SHARE_DIR', 'R_TESTS', 'R_UNZIPCMD', 'R_USER', 'R_VERSION', 'R_ZIPCMD', 'SED', 'SHLVL', 'SYSTEMDRIVE', 'SYSTEMROOT', 'TAR', 'TAR_OPTIONS', 'TEMP', 'TERM', 'TEXINPUTS', 'TMP', 'TMPDIR', 'USERDOMAIN', 'USERDOMAIN_ROAMINGPROFILE', 'USERNAME', 'USERPROFILE', 'WINDIR', '_', '_R_CHECK_AUTOCONF_', '_R_CHECK_BOGUS_RETURN_', '_R_CHECK_BROWSER_NONINTERACTIVE_', '_R_CHECK_BUILD_VIGNETTES_SEPARATELY_', '_R_CHECK_CODETOOLS_PROFILE_', '_R_CHECK_CODE_ASSIGN_TO_GLOBALENV_', '_R_CHECK_CODE_ATTACH_', '_R_CHECK_CODE_CLASS_IS_STRING_', '_R_CHECK_CODE_DATA_INTO_GLOBALENV_', '_R_CHECK_CODE_USAGE_VIA_NAMESPACES_', '_R_CHECK_CODE_USAGE_WITHOUT_LOADING_', '_R_CHECK_CODE_USAGE_WITH_ONLY_BASE_ATTACHED_', '_R_CHECK_CODOC_VARIABLES_IN_USAGES_', '_R_CHECK_COMPACT_DATA2_', '_R_CHECK_COMPILATION_FLAGS_', '_R_CHECK_CONNECTIONS_LEFT_OPEN_', '_R_CHECK_CRAN_INCOMING_', '_R_CHECK_CRAN_INCOMING_CHECK_FILE_URIS_', '_R_CHECK_CRAN_INCOMING_CHECK_URLS_IN_PARALLEL_', '_R_CHECK_CRAN_INCOMING_NOTE_GNU_MAKE_', '_R_CHECK_CRAN_INCOMING_REMOTE_', '_R_CHECK_CRAN_INCOMING_USE_ASPELL_', '_R_CHECK_DATALIST_', '_R_CHECK_DEPRECATED_DEFUNCT_', '_R_CHECK_DOC_SIZES2_', '_R_CHECK_DOT_FIRSTLIB_', '_R_CHECK_DOT_INTERNAL_', '_R_CHECK_EXAMPLE_TIMING_THRESHOLD_', '_R_CHECK_EXECUTABLES_', '_R_CHECK_EXECUTABLES_EXCLUSIONS_', '_R_CHECK_FF_CALLS_', '_R_CHECK_FF_DUP_', '_R_CHECK_FORCE_SUGGESTS_', '_R_CHECK_FUTURE_FILE_TIMESTAMPS_', '_R_CHECK_FUTURE_FILE_TIMESTAMPS_LEEWAY_', '_R_CHECK_HAVE_MYSQL_', '_R_CHECK_HAVE_ODBC_', '_R_CHECK_HAVE_PERL_', '_R_CHECK_HAVE_POSTGRES_', '_R_CHECK_INSTALL_DEPENDS_', '_R_CHECK_INTERNALS2_', '_R_CHECK_LENGTH_1_CONDITION_', '_R_CHECK_LICENSE_', '_R_CHECK_LIMIT_CORES_', '_R_CHECK_LOG_USE_INFO_', '_R_CHECK_MATRIX_DATA_', '_R_CHECK_MBCS_CONVERSION_FAILURE_', '_R_CHECK_NATIVE_ROUTINE_REGISTRATION_', '_R_CHECK_NEWS_IN_PLAIN_TEXT_', '_R_CHECK_NO_RECOMMENDED_', '_R_CHECK_NO_STOP_ON_TEST_ERROR_', '_R_CHECK_ORPHANED_', '_R_CHECK_OVERWRITE_REGISTERED_S3_METHODS_', '_R_CHECK_PACKAGES_USED_IGNORE_UNUSED_IMPORTS_', '_R_CHECK_PACKAGES_USED_IN_TESTS_USE_SUBDIRS_', '_R_CHECK_PACKAGE_DATASETS_SUPPRESS_NOTES_', '_R_CHECK_PACKAGE_NAME_', '_R_CHECK_PKG_SIZES_', '_R_CHECK_PKG_SIZES_THRESHOLD_', '_R_CHECK_PRAGMAS_', '_R_CHECK_RD_EXAMPLES_T_AND_F_', '_R_CHECK_RD_LINE_WIDTHS_', '_R_CHECK_RD_MATH_RENDERING_', '_R_CHECK_RD_NOTE_LOST_BRACES_', '_R_CHECK_RD_VALIDATE_RD2HTML_', '_R_CHECK_REPLACING_IMPORTS_', '_R_CHECK_R_DEPENDS_', '_R_CHECK_S3_METHODS_SHOW_POSSIBLE_ISSUES_', '_R_CHECK_SCREEN_DEVICE_', '_R_CHECK_SERIALIZATION_', '_R_CHECK_SHLIB_OPENMP_FLAGS_', '_R_CHECK_SRC_MINUS_W_IMPLICIT_', '_R_CHECK_SUBDIRS_NOCASE_', '_R_CHECK_SUGGESTS_ONLY_', '_R_CHECK_SYSTEM_CLOCK_', '_R_CHECK_TESTS_NLINES_', '_R_CHECK_TEST_TIMING_', '_R_CHECK_TIMINGS_', '_R_CHECK_TOPLEVEL_FILES_', '_R_CHECK_UNDOC_USE_ALL_NAMES_', '_R_CHECK_UNSAFE_CALLS_', '_R_CHECK_URLS_SHOW_301_STATUS_', '_R_CHECK_VC_DIRS_', '_R_CHECK_VIGNETTES_NLINES_', '_R_CHECK_VIGNETTES_SKIP_RUN_MAYBE_', '_R_CHECK_VIGNETTE_TIMING_', '_R_CHECK_VIGNETTE_TITLES_', '_R_CHECK_WINDOWS_DEVICE_', '_R_CHECK_XREFS_NOTE_MISSING_PACKAGE_ANCHORS_', '_R_CHECK_XREFS_USE_ALIASES_FROM_CRAN_', '_R_CLASS_MATRIX_ARRAY_', '_R_DEPRECATED_IS_R_', '_R_S3_METHOD_LOOKUP_BASEENV_AFTER_GLOBALENV_', '_R_SHLIB_BUILD_OBJECTS_SYMBOL_TABLES_', '_R_USE_STRICT_R_HEADERS_', '__R_CHECK_DOC_FILES_NOTE_IF_ALL_SPECIAL__', 'maj.version', 'nextArg--timingsnextArg--install'
 - Environment variables still there: [n=0] 
 - Environment variables missing: [n=1] 'MAKEFLAGS'
Differences environment variable by environment variable:
List of 3
 $ name    : chr "MAKEFLAGS"
 $ expected: 'Dlist' chr ""
 $ actual  : 'Dlist' chr NA
> 
> proc.time()
   user  system elapsed 
   0.92    0.21    1.12