shape_string() fails on mono italic font

[dmurdoch]

I get a Freetype error when trying to shape italic mono text:

# This works:

textshaping::shape_text("abc", family = "mono", italic = TRUE)
#> $shape
#>   glyph index metric_id string_id  x_offset y_offset x_midpoint
#> 1     0    68         1         1  0.000000        0    3.59375
#> 2     1    69         1         1  7.203125        0    3.59375
#> 3     2    70         1         1 14.406250        0    3.59375
#> 
#> $metrics
#>   string    width   height left_bearing right_bearing top_bearing
#> 1    abc 21.60938 21.04688      0.96875     -0.140625       1.375
#>   bottom_bearing left_border top_border    pen_x pen_y
#> 1         2.8125           0   9.046875 21.60938     0

# This doesn't:

systemfonts::shape_string("abc", family = "mono", italic = TRUE)
#> Error: Failed to shape string (abc) with font file (/System/Library/Fonts/Courier.ttc) with freetype error 130

sessionInfo()
#> R version 4.3.1 (2023-06-16)
#> Platform: x86_64-apple-darwin20 (64-bit)
#> Running under: macOS Monterey 12.7
#> 
#> Matrix products: default
#> BLAS:   /Library/Frameworks/R.framework/Versions/4.3-x86_64/Resources/lib/libRblas.0.dylib 
#> LAPACK: /Library/Frameworks/R.framework/Versions/4.3-x86_64/Resources/lib/libRlapack.dylib;  LAPACK version 3.11.0
#> 
#> locale:
#> [1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8
#> 
#> time zone: America/Toronto
#> tzcode source: internal
#> 
#> attached base packages:
#> [1] stats     graphics  grDevices utils     datasets  methods   base     
#> 
#> loaded via a namespace (and not attached):
#>  [1] styler_1.10.2     digest_0.6.33     fastmap_1.1.1     xfun_0.40        
#>  [5] magrittr_2.0.3    glue_1.6.2        R.utils_2.12.2    knitr_1.44       
#>  [9] htmltools_0.5.6   rmarkdown_2.25    lifecycle_1.0.3   cli_3.6.1        
#> [13] R.methodsS3_1.8.2 vctrs_0.6.3       reprex_2.0.2      textshaping_0.3.6
#> [17] withr_2.5.0       systemfonts_1.0.4 compiler_4.3.1    R.oo_1.25.0      
#> [21] R.cache_0.16.0    purrr_1.0.2       rstudioapi_0.15.0 tools_4.3.1      
#> [25] evaluate_0.21     yaml_2.3.7        rlang_1.1.1       fs_1.6.3

^{Created on 2023-09-29 with reprex v2.0.2}

[thomasp85]

Thanks - 130 is a FreeType stack overflow error so this would suggest issues with either the font file or freetype... I'll try to see if I can reproduce the issue