Error(s) in re-building vignettes:
  ...
--- re-building ‘inspiration.Rmd’ using rmarkdown
** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/mazing.Rcheck/vign_test/mazing/vignettes/inspiration_files/figure-html/m1-1.png
1344x960 pixels, 8 bits/pixel, 256 colors in palette
Reducing image to 8 bits/pixel, grayscale
Input IDAT size = 81892 bytes
Input file size = 82858 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 74270
  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 = 74270

Output IDAT size = 74270 bytes (7622 bytes decrease)
Output file size = 74348 bytes (8510 bytes = 10.27% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/mazing.Rcheck/vign_test/mazing/vignettes/inspiration_files/figure-html/mcircle-1.png
1344x960 pixels, 8 bits/pixel, 256 colors in palette
Reducing image to 8 bits/pixel, grayscale
Input IDAT size = 16685 bytes
Input file size = 17567 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 13917
  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		IDAT size = 13575
  zc = 9  zm = 8  zs = 1  f = 5
  zc = 1  zm = 8  zs = 2  f = 5
  zc = 9  zm = 8  zs = 3  f = 5		IDAT size = 13198

Selecting parameters:
  zc = 9  zm = 8  zs = 3  f = 5		IDAT size = 13198

Output IDAT size = 13198 bytes (3487 bytes decrease)
Output file size = 13276 bytes (4291 bytes = 24.43% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/mazing.Rcheck/vign_test/mazing/vignettes/inspiration_files/figure-html/mcircWalls-1.png
1344x960 pixels, 8 bits/pixel, 256 colors in palette
Reducing image to 8 bits/pixel, grayscale
Input IDAT size = 14644 bytes
Input file size = 15514 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 12527
  zc = 9  zm = 8  zs = 1  f = 0		IDAT size = 12527
  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 = 1  f = 0		IDAT size = 12527

Output IDAT size = 12527 bytes (2117 bytes decrease)
Output file size = 12605 bytes (2909 bytes = 18.75% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/mazing.Rcheck/vign_test/mazing/vignettes/inspiration_files/figure-html/mcircBoth-1.png
1344x960 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 51275 bytes
Input file size = 51425 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 45057
  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 = 45057

Output IDAT size = 45057 bytes (6218 bytes decrease)
Output file size = 45135 bytes (6290 bytes = 12.23% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/mazing.Rcheck/vign_test/mazing/vignettes/inspiration_files/figure-html/openings-1.png
1344x960 pixels, 8 bits/pixel, 256 colors in palette
Reducing image to 8 bits/pixel, grayscale
Input IDAT size = 14612 bytes
Input file size = 15482 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 12490
  zc = 9  zm = 8  zs = 1  f = 0		IDAT size = 12490
  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 = 1  f = 0		IDAT size = 12490

Output IDAT size = 12490 bytes (2122 bytes decrease)
Output file size = 12568 bytes (2914 bytes = 18.82% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/mazing.Rcheck/vign_test/mazing/vignettes/inspiration_files/figure-html/openings2-1.png
1344x960 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 29115 bytes
Input file size = 29229 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 26136
  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		IDAT size = 25758
  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 = 5		IDAT size = 25758

Output IDAT size = 25758 bytes (3357 bytes decrease)
Output file size = 25836 bytes (3393 bytes = 11.61% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/mazing.Rcheck/vign_test/mazing/vignettes/inspiration_files/figure-html/mAdjust-1.png
1344x960 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 60769 bytes
Input file size = 60931 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 53636
  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 = 53636

Output IDAT size = 53636 bytes (7133 bytes decrease)
Output file size = 53714 bytes (7217 bytes = 11.84% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/mazing.Rcheck/vign_test/mazing/vignettes/inspiration_files/figure-html/mAdjust2-1.png
1344x960 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 76290 bytes
Input file size = 76476 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 66816
  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 = 66816

Output IDAT size = 66816 bytes (9474 bytes decrease)
Output file size = 66894 bytes (9582 bytes = 12.53% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/mazing.Rcheck/vign_test/mazing/vignettes/inspiration_files/figure-html/solve-1.png
1344x960 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 32013 bytes
Input file size = 32127 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 28749
  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		IDAT size = 28592
  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 = 5		IDAT size = 28592

Output IDAT size = 28592 bytes (3421 bytes decrease)
Output file size = 28670 bytes (3457 bytes = 10.76% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/mazing.Rcheck/vign_test/mazing/vignettes/inspiration_files/figure-html/solvepoints-1.png
1344x960 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 32018 bytes
Input file size = 32132 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 28749
  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		IDAT size = 28576
  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 = 5		IDAT size = 28576

Output IDAT size = 28576 bytes (3442 bytes decrease)
Output file size = 28654 bytes (3478 bytes = 10.82% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/mazing.Rcheck/vign_test/mazing/vignettes/inspiration_files/figure-html/customsolve-1.png
1344x960 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 33985 bytes
Input file size = 34111 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 30635
  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 = 30635

Output IDAT size = 30635 bytes (3350 bytes decrease)
Output file size = 30713 bytes (3398 bytes = 9.96% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/mazing.Rcheck/vign_test/mazing/vignettes/inspiration_files/figure-html/msquared-1.png
1344x1536 pixels, 8 bits/pixel, 256 colors in palette
Reducing image to 8 bits/pixel, grayscale
Input IDAT size = 318836 bytes
Input file size = 320150 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 310977
  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 = 310977

Output IDAT size = 310977 bytes (7859 bytes decrease)
Output file size = 311055 bytes (9095 bytes = 2.84% decrease)


Quitting from lines 139-146 [external] (inspiration.Rmd)
Error: processing vignette 'inspiration.Rmd' failed with diagnostics:
could not find function "emoji"
--- failed re-building ‘inspiration.Rmd’

SUMMARY: processing the following file failed:
  ‘inspiration.Rmd’

Error: Vignette re-building failed.
Execution halted