• using R Under development (unstable) (2026-03-15 r89634)
• using platform: x86_64-pc-linux-gnu
• R was compiled by     Debian clang version 21.1.8 (3+b1)     Debian flang version 21.1.8 (3+b1)
• running under: Debian GNU/Linux forky/sid
• using session charset: UTF-8 * current time: 2026-03-17 08:14:38 UTC
• checking for file ‘showtext/DESCRIPTION’ ... OK
• checking extension type ... Package
• this is package ‘showtext’ version ‘0.9-7’
• package encoding: UTF-8
• checking CRAN incoming feasibility ... [2s/3s] NOTE Maintainer: ‘Yixuan Qiu <yixuan.qiu@cos.name>’ No Authors@R field in DESCRIPTION. Please add one, modifying   Authors@R: c(person(given = "Yixuan",                       family = "Qiu",                       role = c("aut", "cre"),                       email = "yixuan.qiu@cos.name"),                person(given = c("authors/contributors", "of", "the", "included", "software.", "See", "file", "AUTHORS", "for"),                       family = "details.",                       role = "aut")) as necessary.
• 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 ‘showtext’ can be installed ... OK See the install log for details.
• used C compiler: ‘Debian clang version 21.1.8 (3+b1)’
• checking package directory ... OK
• checking for future file timestamps ... OK
• checking ‘build’ 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 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/1s] OK
• checking whether startup messages can be suppressed ... [0s/1s] 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/5s] 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 line endings in shell scripts ... OK
• checking line endings in C/C++/Fortran sources/headers ... OK
• checking line endings in Makefiles ... OK
• checking compilation flags in Makevars ... OK
• checking for GNU extensions in Makefiles ... OK
• checking for portable use of $(BLAS_LIBS) and $(LAPACK_LIBS) ... OK
• checking use of PKG_*FLAGS in Makefiles ... OK
• checking use of SHLIB_OPENMP_*FLAGS in Makefiles ... OK
• checking pragmas in C/C++ headers and code ... OK
• checking compilation flags used ... OK
• checking compiled code ... NOTE File ‘showtext/libs/showtext.so’:   Found non-API call to R: ‘Rf_findVar’ Compiled code should not call non-API entry points in R. See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual, and section ‘Moving into C API compliance’ for issues with the use of non-API entry points.
• checking installed files from ‘inst/doc’ ... OK
• checking files in ‘vignettes’ ... OK
• checking examples ... [1s/1s] OK
• checking for unstated dependencies in vignettes ... OK
• checking package vignettes ... OK
• checking re-building of vignette outputs ... [7s/10s] ERROR Error(s) in re-building vignettes:   ... --- re-building ‘introduction.Rmd’ using rmarkdown  *** caught segfault *** address (nil), cause 'memory not mapped' Traceback:  1: title("Histogram of Normal Random Numbers", family = "bell", cex.main = 2)  2: eval(expr, envir)  3: eval(expr, envir)  4: withVisible(eval(expr, envir))  5: withCallingHandlers(code, error = function (e) rlang::entrace(e), message = function (cnd) { watcher$capture_plot_and_output() if (on_message$capture) { watcher$push(cnd) } if (on_message$silence) { invokeRestart("muffleMessage") }}, warning = function (cnd) { if (getOption("warn") >= 2 || getOption("warn") < 0) { return() } watcher$capture_plot_and_output() if (on_warning$capture) { cnd <- sanitize_call(cnd) watcher$push(cnd) } if (on_warning$silence) { invokeRestart("muffleWarning") }}, error = function (cnd) { watcher$capture_plot_and_output() cnd <- sanitize_call(cnd) watcher$push(cnd) switch(on_error, continue = invokeRestart("eval_continue"), stop = invokeRestart("eval_stop"), error = NULL)})  6: eval(call)  7: eval(call)  8: with_handlers({ for (expr in tle$exprs) { ev <- withVisible(eval(expr, envir)) watcher$capture_plot_and_output() watcher$print_value(ev$value, ev$visible, envir) } TRUE}, handlers)  9: doWithOneRestart(return(expr), restart) 10: withOneRestart(expr, restarts[[1L]]) 11: withRestartList(expr, restarts[-nr]) 12: doWithOneRestart(return(expr), restart) 13: withOneRestart(withRestartList(expr, restarts[-nr]), restarts[[nr]]) 14: withRestartList(expr, restarts) 15: withRestarts(with_handlers({ for (expr in tle$exprs) { ev <- withVisible(eval(expr, envir)) watcher$capture_plot_and_output() watcher$print_value(ev$value, ev$visible, envir) } TRUE}, handlers), eval_continue = function() TRUE, eval_stop = function() FALSE) 16: evaluate::evaluate(...) 17: evaluate(code, envir = env, new_device = FALSE, keep_warning = if (is.numeric(options$warning)) TRUE else options$warning, keep_message = if (is.numeric(options$message)) TRUE else options$message, stop_on_error = if (is.numeric(options$error)) options$error else { if (options$error && options$include) 0L else 2L }, output_handler = knit_handlers(options$render, options)) 18: in_dir(input_dir(), expr) 19: in_input_dir(evaluate(code, envir = env, new_device = FALSE, keep_warning = if (is.numeric(options$warning)) TRUE else options$warning, keep_message = if (is.numeric(options$message)) TRUE else options$message, stop_on_error = if (is.numeric(options$error)) options$error else { if (options$error && options$include) 0L else 2L }, output_handler = knit_handlers(options$render, options))) 20: eng_r(options) 21: block_exec(params) 22: call_block(x) 23: process_group(group) 24: withCallingHandlers(if (tangle) process_tangle(group) else process_group(group), error = function(e) { if (progress && is.function(pb$interrupt)) pb$interrupt() if (is_R_CMD_build() || is_R_CMD_check()) error <<- format(e) }) 25: with_options(withCallingHandlers(if (tangle) process_tangle(group) else process_group(group), error = function(e) { if (progress && is.function(pb$interrupt)) pb$interrupt() if (is_R_CMD_build() || is_R_CMD_check()) error <<- format(e) }), list(rlang_trace_top_env = knit_global())) 26: xfun:::handle_error(with_options(withCallingHandlers(if (tangle) process_tangle(group) else process_group(group), error = function(e) { if (progress && is.function(pb$interrupt)) pb$interrupt() if (is_R_CMD_build() || is_R_CMD_check()) error <<- format(e) }), list(rlang_trace_top_env = knit_global())), function(loc) { setwd(wd) write_utf8(res, output %n% stdout()) paste0("\nQuitting from ", loc, if (!is.null(error)) paste0("\n", rule(), error, "\n", rule()))}, if (labels[i] != "") sprintf(" [%s]", labels[i]), get_loc) 27: process_file(text, output) 28: knitr::knit(knit_input, knit_output, envir = envir, quiet = quiet) 29: rmarkdown::render(file, encoding = encoding, quiet = quiet, envir = globalenv(), output_dir = getwd(), ...) 30: vweave_rmarkdown(...) 31: engine$weave(file, quiet = quiet, encoding = enc) 32: doTryCatch(return(expr), name, parentenv, handler) 33: tryCatchOne(expr, names, parentenv, handlers[[1L]]) 34: tryCatchList(expr, classes, parentenv, handlers) 35: tryCatch({ engine$weave(file, quiet = quiet, encoding = enc) setwd(startdir) output <- find_vignette_product(name, by = "weave", engine = engine) if (!have.makefile && vignette_is_tex(output)) { texi2pdf(file = output, clean = FALSE, quiet = quiet) output <- find_vignette_product(name, by = "texi2pdf", engine = engine) } outputs <- c(outputs, output)}, error = function(e) { thisOK <<- FALSE fails <<- c(fails, file) message(gettextf("Error: processing vignette '%s' failed with diagnostics:\n%s", file, conditionMessage(e)))}) 36: tools::buildVignettes(dir = "/home/hornik/tmp/R.check/r-devel-clang/Work/PKGS/showtext.Rcheck/vign_test/showtext", skip = TRUE, ser_elibs = "/home/hornik/tmp/scratch/Rtmpssj5eU/fileb1068e10d1aa.rds") An irrecoverable exception occurred. R is aborting now ... Segmentation fault
• checking PDF version of manual ... [4s/6s] OK
• checking HTML version of manual ... [0s/1s] OK
• checking for non-standard things in the check directory ... OK
• DONE

Status: 1 ERROR, 2 NOTEs