Rollup merge of #147292 - Urgau:rustdoc-test-unstable_opts, r=fmease

Respect `-Z` unstable options in `rustdoc --test`

This PR makes rustdoc respect `-Z` unstable options when collecting doctests (`rustdoc --test`).

In the process I also realized that `--error-format` wasn't respected as well, making UI annotations impossible to write so I fixed that as well.

Best reviewed commit by commit.

Fixes https://github.com/rust-lang/rust/issues/147276
Fixes https://github.com/rust-lang/rust/issues/143930
r? fmease

1 files changed, 14 insertions, 0 deletions

diff --git a/tests/rustdoc-ui/doctest/unstable-opts-143930.rs b/tests/rustdoc-ui/doctest/unstable-opts-143930.rs
new file mode 100644
index 00000000000..30c47f5b7e9
--- /dev/null
+++ b/tests/rustdoc-ui/doctest/unstable-opts-143930.rs
@@ -0,0 +1,14 @@
+// This test verifies that unstable options like `-Zcrate-attr` are respected when `--test` is
+// passed.
+//
+// <https://github.com/rust-lang/rust/issues/143930>
+//
+// NOTE: If any of these command line arguments or features get stabilized, please replace with
+// another unstable one.
+
+//@ check-pass
+//@ normalize-stdout: "finished in \d+\.\d+s" -> "finished in $$TIME"
+//@ compile-flags: --test -Zcrate-attr=feature(register_tool) -Zcrate-attr=register_tool(rapx)
+
+#[rapx::tag]
+fn f() {}