• using R Under development (unstable) (2018-06-15 r74904)
• using platform: x86_64-pc-linux-gnu (64-bit)
• using session charset: UTF-8
• checking for file ‘io/DESCRIPTION’ ... OK
• checking extension type ... Package
• this is package ‘io’ version ‘0.3.0’
• 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 ‘io’ can be installed ... 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 ... [5s/8s] OK
• checking Rd files ... 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 ... [0s/1s] OK
• checking for unstated dependencies in ‘tests’ ... OK
• checking tests ... [1s/2s] ERROR
    Running ‘testthat.R’ [1s/1s]
  Running the tests in ‘tests/testthat.R’ failed.
  Complete output:
    > library(testthat)
    > library(stringr)
    > library(io)
    Loading required package: filenamer
    >
    > test_check("io")
    ── 1. Error: (unknown) (@test_read-write-read.R#8) ────────────────────────────
    no applicable method for 'h5write' applied to an object of class "character"
    1: test_read_write_read(f) at testthat/test_read-write-read.R:8
    2: qwrite(x, outfile) at /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/io.Rcheck/tests/testthat/helper.R:48
    3: .qwrite(x, if (is.filename(file)) as.character(file) else file, if (is.null(type)) .infer_file_type(file) else type,
           ...)
    4: qwrite.hdf5(x, if (is.filename(file)) as.character(file) else file, if (is.null(type)) .infer_file_type(file) else type,
           ...)
    5: .write_hdf5_array(x, file)
    6: rhdf5::h5write("array", file, "type")
    
    ══ testthat results ═══════════════════════════════════════════════════════════
    OK: 0 SKIPPED: 0 FAILED: 1
    1. Error: (unknown) (@test_read-write-read.R#8)
    
    Error: testthat unit tests failed
    Execution halted
• checking PDF version of manual ... OK
• DONE

Status: 1 ERROR