Error(s) in re-building vignettes:
  ...
--- re-building ‘etwfe.Rmd’ using rmarkdown
** Processing: /home/hornik/tmp/R.check/r-patched-gcc/Work/PKGS/etwfe.Rcheck/vign_test/etwfe/vignettes/etwfe_files/figure-html/unnamed-chunk-7-1.png
288x288 pixels, 8 bits/pixel, 255 colors in palette
Reducing image to 8 bits/pixel, grayscale
Input IDAT size = 4564 bytes
Input file size = 5419 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 4107
  zc = 9  zm = 8  zs = 1  f = 0
  zc = 1  zm = 8  zs = 2  f = 0
  zc = 9  zm = 8  zs = 3  f = 0
  zc = 9  zm = 8  zs = 0  f = 5
  zc = 9  zm = 8  zs = 1  f = 5
  zc = 1  zm = 8  zs = 2  f = 5
  zc = 9  zm = 8  zs = 3  f = 5
                               
Selecting parameters:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 4107

Output IDAT size = 4107 bytes (457 bytes decrease)
Output file size = 4185 bytes (1234 bytes = 22.77% decrease)

** Processing: /home/hornik/tmp/R.check/r-patched-gcc/Work/PKGS/etwfe.Rcheck/vign_test/etwfe/vignettes/etwfe_files/figure-html/unnamed-chunk-8-1.png
288x288 pixels, 8 bits/pixel, 256 colors in palette
Reducing image to 8 bits/pixel, grayscale
Input IDAT size = 5136 bytes
Input file size = 5994 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 4680
  zc = 9  zm = 8  zs = 1  f = 0
  zc = 1  zm = 8  zs = 2  f = 0
  zc = 9  zm = 8  zs = 3  f = 0
  zc = 9  zm = 8  zs = 0  f = 5
  zc = 9  zm = 8  zs = 1  f = 5
  zc = 1  zm = 8  zs = 2  f = 5
  zc = 9  zm = 8  zs = 3  f = 5
                               
Selecting parameters:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 4680

Output IDAT size = 4680 bytes (456 bytes decrease)
Output file size = 4758 bytes (1236 bytes = 20.62% decrease)

** Processing: /home/hornik/tmp/R.check/r-patched-gcc/Work/PKGS/etwfe.Rcheck/vign_test/etwfe/vignettes/etwfe_files/figure-html/unnamed-chunk-9-1.png
288x288 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 18504 bytes
Input file size = 18606 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 13614
  zc = 9  zm = 8  zs = 1  f = 0
  zc = 1  zm = 8  zs = 2  f = 0
  zc = 9  zm = 8  zs = 3  f = 0
  zc = 9  zm = 8  zs = 0  f = 5
  zc = 9  zm = 8  zs = 1  f = 5
  zc = 1  zm = 8  zs = 2  f = 5
  zc = 9  zm = 8  zs = 3  f = 5
                               
Selecting parameters:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 13614

Output IDAT size = 13614 bytes (4890 bytes decrease)
Output file size = 13692 bytes (4914 bytes = 26.41% decrease)

** Processing: /home/hornik/tmp/R.check/r-patched-gcc/Work/PKGS/etwfe.Rcheck/vign_test/etwfe/vignettes/etwfe_files/figure-html/unnamed-chunk-10-1.png
288x288 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 13132 bytes
Input file size = 13222 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 10112
  zc = 9  zm = 8  zs = 1  f = 0
  zc = 1  zm = 8  zs = 2  f = 0
  zc = 9  zm = 8  zs = 3  f = 0
  zc = 9  zm = 8  zs = 0  f = 5
  zc = 9  zm = 8  zs = 1  f = 5
  zc = 1  zm = 8  zs = 2  f = 5
  zc = 9  zm = 8  zs = 3  f = 5
                               
Selecting parameters:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 10112

Output IDAT size = 10112 bytes (3020 bytes decrease)
Output file size = 10190 bytes (3032 bytes = 22.93% decrease)

** Processing: /home/hornik/tmp/R.check/r-patched-gcc/Work/PKGS/etwfe.Rcheck/vign_test/etwfe/vignettes/etwfe_files/figure-html/unnamed-chunk-15-1.png
288x288 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 11348 bytes
Input file size = 11438 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 7902
  zc = 9  zm = 8  zs = 1  f = 0
  zc = 1  zm = 8  zs = 2  f = 0
  zc = 9  zm = 8  zs = 3  f = 0
  zc = 9  zm = 8  zs = 0  f = 5
  zc = 9  zm = 8  zs = 1  f = 5
  zc = 1  zm = 8  zs = 2  f = 5
  zc = 9  zm = 8  zs = 3  f = 5
                               
Selecting parameters:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 7902

Output IDAT size = 7902 bytes (3446 bytes decrease)
Output file size = 7980 bytes (3458 bytes = 30.23% decrease)

malloc(): unsorted double linked list corrupted
Aborted