[help] Strange no 'pattern' error after updating to targets 1.9 when using AWS targets store

[n8layman]

Help

• I understand and agree to https://books.ropensci.org/targets/help.html.

Description

After updating to targets 1.9 from 1.7 I encountered a strange could not load dependency points of target. no 'pattern' error. The issue only seems to occur so far when a dynamically branched target is processed by another downstream dynamically branched target mapping over the same branches. I'll include a reprex below but with my AWS bucket specifics removed. The problem goes away when I remove the tar_option_set block. Has anyone else encountered this?

Error:
Error:
! targets::tar_make() error

── Debugging ────────────────────────────────────────────────────────────────
    • tar_errored()
    • tar_meta(fields = any_of("error"), complete_only = TRUE)
    • tar_workspace()
    • tar_workspaces()

── How to ───────────────────────────────────────────────────────────────────
    • Debug: https://books.ropensci.org/targets/debugging.html
    • Help: https://books.ropensci.org/targets/help.html

── Last error message ───────────────────────────────────────────────────────
    could not load dependency points of target combined_plot. no 'pattern'

── Last error traceback ─────────────────────────────────────────────────────
    stop("could not load dependency points of target combined_plot. no 'patt...
    .handleSimpleError(function (condition)  {     state$error <- build_mess...
    h(simpleError(msg, call))

Reprex _targets.R

# _targets.R
library(ggplot2)
library(targets)
library(tarchetypes)
library(tibble)


  tar_option_set(
    repository = "aws",
    resources = tar_resources(
      aws = tar_resources_aws(
        prefix = "_targets_test",
        bucket = Sys.getenv("AWS_BUCKET_ID"),
        region = Sys.getenv("AWS_REGION")
      ),
    ),
  )

# From https://github.com/wjschne/spiro/blob/87f73ec37ceb0a7a9d09856ada8ae28d587a2ebd/R/spirograph.R
# Adapted under the CC0 1.0 Universal license: https://github.com/wjschne/spiro/blob/87f73ec37ceb0a7a9d09856ada8ae28d587a2ebd/LICENSE.md
spirograph_points <- function(fixed_radius, cycling_radius) {
  t <- seq(1, 30 * pi, length.out = 1e4)
  diff <- (fixed_radius - cycling_radius)
  ratio <- diff / cycling_radius
  x <- diff * cos(t) + cos(t * ratio)
  y <- diff * sin(t) - sin(t * ratio)
  tibble(x = x, y = y, fixed_radius = fixed_radius, cycling_radius = cycling_radius)
}

plot_spirographs <- function(points) {
  label <- "fixed_radius = %s, cycling_radius = %s"
  points$parameters <- sprintf(label, points$fixed_radius, points$cycling_radius)
  ggplot(points) +
    geom_point(aes(x = x, y = y, color = parameters), size = 0.1) +
    facet_wrap(~parameters) +
    theme_gray(16) +
    guides(color = "none")
}

list(
  tar_target(fixed_radius, sample.int(n = 10, size = 2)),
  tar_target(cycling_radius, sample.int(n = 10, size = 2)),
  tar_target(
    points,
    spirograph_points(fixed_radius, cycling_radius),
    pattern = map(fixed_radius, cycling_radius)
  ),
  tar_target(
    single_plot,
    plot_spirographs(points),
    pattern = map(points),
    iteration = "list"
  ),
  tar_target(combined_plot, plot_spirographs(points))
)

[n8layman]

> sessionInfo()
R version 4.3.2 (2023-10-31)
Platform: aarch64-apple-darwin20 (64-bit)
Running under: macOS Sonoma 14.6.1

Matrix products: default
BLAS:   /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vecLib.framework/Versions/A/libBLAS.dylib 
LAPACK: /Library/Frameworks/R.framework/Versions/4.3-arm64/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/Los_Angeles
tzcode source: internal

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

other attached packages:
[1] targets_1.9.0

loaded via a namespace (and not attached):
 [1] igraph_2.1.1      backports_1.5.0   utf8_1.2.4        R6_2.5.1          codetools_0.2-19  tidyselect_1.2.1 
 [7] xfun_0.39         magrittr_2.0.3    glue_1.8.0        tibble_3.2.1      knitr_1.43        pkgconfig_2.0.3  
[13] secretbase_1.0.3  lifecycle_1.0.4   ps_1.8.1          cli_3.6.3         fansi_1.0.6       processx_3.8.2   
[19] callr_3.7.3       vctrs_0.6.5       data.table_1.14.8 compiler_4.3.2    rstudioapi_0.15.0 tools_4.3.2      
[25] pillar_1.9.0      yaml_2.3.7        base64url_1.4     rlang_1.1.4     

[wlandau]

Thanks for the reprex, this was a bug from my efforts to make targets 1.9.0 more memory-efficient. I was able to reproduce it on my end, and I fixed it in 72e6ce0. Please let me know if you find other reproducible cases like this one.

[n8layman]

Will do. Thanks, Will