Merge branch 'master' into use-qs2

Author: jgabry

.github/workflows/R-CMD-check-wsl.yaml

@@ -82,7 +82,7 @@ jobs:
 
       - name: Upload check results
         if: failure()
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         with:
           name: wsl-backend-results
           path: check

.github/workflows/R-CMD-check.yaml

@@ -107,7 +107,7 @@ jobs:
 
       - name: Upload check results
         if: failure()
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         with:
           name: ${{ runner.os }}-r${{ matrix.config.r }}-results
           path: check

.github/workflows/Test-coverage.yaml

@@ -107,7 +107,7 @@ jobs:
 
       - name: Upload test results
         if: failure()
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         with:
           name: coverage-test-failures
           path: ${{ runner.temp }}/package

.github/workflows/cmdstan-tarball-check.yaml

@@ -56,7 +56,7 @@ jobs:
 
       - name: Cache R packages
         if: runner.os != 'Windows'
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: ${{ env.R_LIBS_USER }}
           key: ${{ runner.os }}-${{ hashFiles('.github/R-version') }}-1-${{ hashFiles('.github/depends.Rds') }}
@@ -95,7 +95,7 @@ jobs:
 
       - name: Upload check results
         if: failure()
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         with:
           name: ${{ runner.os }}-r${{ matrix.config.r }}-results
           path: check

tests/testthat/test-csv.R

@@ -84,8 +84,12 @@ test_that("read_cmdstan_csv() fails if the file does not exist", {
 test_that("read_cmdstan_csv() fails with empty csv file", {
   file_path <- test_path("resources", "csv", "empty.csv")
   file.create(file_path)
-  expect_error(read_cmdstan_csv(file_path),
-               "Supplied CSV file is corrupt!")
+  error_msg <- if (utils::packageVersion("data.table") >= "1.18.0") {
+    "External command failed"
+  } else {
+    "Supplied CSV file is corrupt"
+  }
+  expect_error(read_cmdstan_csv(file_path), error_msg, fixed = TRUE)
   file.remove(file_path)
 })