Enforce in bootstrap that test must have stage at least 1 (except for compiletest)

compiler/rustc_lint_defs/src/builtin.rs

@@ -2309,10 +2309,10 @@
     /// ### Example
     ///
     /// ```rust
-    /// #![feature(sanitize)]
+    /// #![cfg_attr(not(bootstrap), feature(sanitize))]
     ///
     /// #[inline(always)]
-    /// #[sanitize(address = "off")]
+    /// #[cfg_attr(not(bootstrap), sanitize(address = "off"))]
     /// fn x() {}
     ///
     /// fn main() {
@@ -4832,8 +4832,9 @@
     ///
     /// ### Example
     ///
-    /// ```rust,compile_fail
+    #[cfg_attr(not(bootstrap), doc = "```rust,compile_fail")]
+    #[cfg_attr(bootstrap, doc = "```rust")]
     /// #![doc = in_root!()]
     ///
     /// macro_rules! in_root { () => { "" } }
     ///

src/bootstrap/src/core/build_steps/check.rs

@@ -8,8 +8,8 @@ use crate::core::build_steps::compile::{
 };
 use crate::core::build_steps::tool;
 use crate::core::build_steps::tool::{
-    COMPILETEST_ALLOW_FEATURES, SourceType, ToolTargetBuildMode, get_tool_target_compiler,
-    prepare_tool_cargo,
+    COMPILETEST_ALLOW_FEATURES, SourceType, TEST_FLOAT_PARSE_ALLOW_FEATURES, ToolTargetBuildMode,
+    get_tool_target_compiler, prepare_tool_cargo,
 };
 use crate::core::builder::{
     self, Alias, Builder, Cargo, Kind, RunConfig, ShouldRun, Step, StepMetadata, crate_description,
@@ -791,7 +791,7 @@ tool_check_step!(MiroptTestTools {
 tool_check_step!(TestFloatParse {
     path: "src/tools/test-float-parse",
     mode: |_builder| Mode::ToolStd,
-    allow_features: tool::TestFloatParse::ALLOW_FEATURES
+    allow_features: TEST_FLOAT_PARSE_ALLOW_FEATURES
 });
 tool_check_step!(FeaturesStatusDump {
     path: "src/tools/features-status-dump",

src/bootstrap/src/core/build_steps/doc.rs

@@ -791,7 +791,11 @@ fn doc_std(
 }
 
 /// Prepare a compiler that will be able to document something for `target` at `stage`.
-fn prepare_doc_compiler(builder: &Builder<'_>, target: TargetSelection, stage: u32) -> Compiler {
+pub fn prepare_doc_compiler(
+    builder: &Builder<'_>,
+    target: TargetSelection,
+    stage: u32,
+) -> Compiler {
     assert!(stage > 0, "Cannot document anything in stage 0");
     let build_compiler = builder.compiler(stage - 1, builder.host_target);
     builder.std(build_compiler, target);