R Under development (unstable) (2025-10-28 r88973 ucrt) -- "Unsuffered Consequences"
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> # This file is part of the standard setup for testthat.
> # It is recommended that you do not modify it.
> #
> # Where should you do additional test configuration?
> # Learn more about the roles of various files in:
> # * https://r-pkgs.org/testing-design.html#sec-tests-files-overview
> # * https://testthat.r-lib.org/articles/special-files.html
> 
> library(testthat)
> library(survdnn)
Warning message:
Torch libraries are installed but loading them caused a segfault.
Please reinstall torch with `install_torch(reinstall = TRUE)`
You can disable this check by setting `TORCH_VERIFY_LOAD` to "FALSE"
! callr subprocess failed: could not start R, exited with non-zero status, has
crashed or was killed 
> 
> test_check("survdnn")
[ FAIL 5 | WARN 0 | SKIP 21 | PASS 0 ]

══ Skipped tests (21) ══════════════════════════════════════════════════════════
• On CRAN (21): 'test-cv_survdnn.R:2:3', 'test-cv_survdnn.R:25:3',
  'test-evaluate_survdnn.R:2:3', 'test-evaluate_survdnn.R:21:3',
  'test-metrics.R:2:3', 'test-metrics.R:20:3', 'test-metrics.R:38:3',
  'test-metrics.R:56:3', 'test-plot.survdnn.R:2:3', 'test-plot.survdnn.R:15:3',
  'test-plot.survdnn.R:32:3', 'test-predict.survdnn.R:2:3',
  'test-predict.survdnn.R:17:3', 'test-predict.survdnn.R:35:3',
  'test-predict.survdnn.R:50:3', 'test-print.survdnn.R:2:3',
  'test-summary.survdnn.R:2:3', 'test-survdnn.R:2:3',
  'test-tune_survdnn.R:2:3', 'test-tune_survdnn.R:62:3',
  'test-tune_survdnn.R:92:3'

══ Failed tests ════════════════════════════════════════════════════════════════
── Error ('test-losses.R:5:3'): cox_loss returns scalar tensor ─────────────────
<std::runtime_error/C++Error/error/condition>
Error in `torch_tensor_cpp(data, dtype, device, requires_grad, pin_memory)`: Lantern is not loaded. Please use `install_torch()` to install additional dependencies.
Backtrace:
    ▆
 1. └─torch::torch_tensor(runif(20, 1, 100)) at test-losses.R:5:3
 2.   └─Tensor$new(data, dtype, device, requires_grad, pin_memory)
 3.     └─methods$initialize(NULL, NULL, ...)
 4.       └─torch:::torch_tensor_cpp(...)
── Error ('test-losses.R:18:3'): cox_l2_loss returns penalized scalar tensor ───
<std::runtime_error/C++Error/error/condition>
Error in `torch_tensor_cpp(data, dtype, device, requires_grad, pin_memory)`: Lantern is not loaded. Please use `install_torch()` to install additional dependencies.
Backtrace:
    ▆
 1. └─torch::torch_tensor(runif(20, 1, 100)) at test-losses.R:18:3
 2.   └─Tensor$new(data, dtype, device, requires_grad, pin_memory)
 3.     └─methods$initialize(NULL, NULL, ...)
 4.       └─torch:::torch_tensor_cpp(...)
── Error ('test-losses.R:33:3'): aft_loss returns scalar tensor (uncensored only) ──
<std::runtime_error/C++Error/error/condition>
Error in `torch_tensor_cpp(data, dtype, device, requires_grad, pin_memory)`: Lantern is not loaded. Please use `install_torch()` to install additional dependencies.
Backtrace:
    ▆
 1. └─torch::torch_tensor(runif(20, 1, 100)) at test-losses.R:33:3
 2.   └─Tensor$new(data, dtype, device, requires_grad, pin_memory)
 3.     └─methods$initialize(NULL, NULL, ...)
 4.       └─torch:::torch_tensor_cpp(...)
── Error ('test-losses.R:46:3'): aft_loss returns 0 for fully censored data ────
<std::runtime_error/C++Error/error/condition>
Error in `torch_tensor_cpp(data, dtype, device, requires_grad, pin_memory)`: Lantern is not loaded. Please use `install_torch()` to install additional dependencies.
Backtrace:
    ▆
 1. └─torch::torch_tensor(runif(10, 1, 100)) at test-losses.R:46:3
 2.   └─Tensor$new(data, dtype, device, requires_grad, pin_memory)
 3.     └─methods$initialize(NULL, NULL, ...)
 4.       └─torch:::torch_tensor_cpp(...)
── Error ('test-losses.R:62:3'): coxtime_loss implements partial likelihood faithfully ──
<std::runtime_error/C++Error/error/condition>
Error in `(function (size, options) 
{
    .Call(`_torch_cpp_torch_namespace_randn_size_IntArrayRef`, 
        size, options)
})(size = c(50, 1), options = list(dtype = NULL, layout = NULL, 
    device = NULL, requires_grad = FALSE))`: Lantern is not loaded. Please use `install_torch()` to install additional dependencies.
Backtrace:
    ▆
 1. └─torch::torch_randn(c(n, 1)) at test-losses.R:62:3
 2.   ├─base::do.call(.torch_randn, args)
 3.   └─torch (local) `<fn>`(options = `<named list>`, size = `<dbl>`)
 4.     └─torch:::call_c_function(...)
 5.       └─torch:::do_call(f, args)
 6.         ├─base::do.call(fun, args)
 7.         └─torch (local) `<fn>`(size = `<dbl>`, options = `<named list>`)

[ FAIL 5 | WARN 0 | SKIP 21 | PASS 0 ]
Error: Test failures
Execution halted