Fix printing stdout on build/install failure

R/subprocess.R

@@ -115,11 +115,11 @@ remote <- function(func, args = list()) {
     # This is a temporary workaround until we have a principled way of
     # printing the various error types in the main process.
     if (inherits(res$error$parent, "package_build_error") &&
-      !is.null(res$error$parent$data$stdout)) {
+      !is.null(res$error$parent$stdout)) {
       res$error$parent$message <- paste0(
         res$error$parent$message,
         "\nFull installation output:\n",
-        paste(res$error$parent$data$stdout, collapse = "\n")
+        paste(res$error$parent$stdout, collapse = "\n")
       )
     }
     err$throw(res$error)