use --edition for doctests, rather than just the crate

src/librustdoc/lib.rs

@@ -446,7 +446,7 @@ pub fn main_args(args: &[String]) -> isize {
     match (should_test, markdown_input) {
         (true, true) => {
             return markdown::test(input, cfgs, libs, externs, test_args, maybe_sysroot,
-                                  display_warnings, linker)
+                                  display_warnings, linker, edition)
         }
         (true, false) => {
             return test::run(Path::new(input), cfgs, libs, externs, test_args, crate_name,

src/librustdoc/markdown.rs

@@ -18,6 +18,7 @@ use testing;
 use rustc::session::search_paths::SearchPaths;
 use rustc::session::config::Externs;
 use syntax::codemap::DUMMY_SP;
+use syntax::edition::Edition;
 
 use externalfiles::{ExternalHtml, LoadStringError, load_string};
 
@@ -139,7 +140,7 @@ pub fn render(input: &Path, mut output: PathBuf, matches: &getopts::Matches,
 /// Run any tests/code examples in the markdown file `input`.
 pub fn test(input: &str, cfgs: Vec<String>, libs: SearchPaths, externs: Externs,
             mut test_args: Vec<String>, maybe_sysroot: Option<PathBuf>,
-            display_warnings: bool, linker: Option<PathBuf>) -> isize {
+            display_warnings: bool, linker: Option<PathBuf>, edition: Edition) -> isize {
     let input_str = match load_string(input) {
         Ok(s) => s,
         Err(LoadStringError::ReadFail) => return 1,
@@ -151,7 +152,7 @@ pub fn test(input: &str, cfgs: Vec<String>, libs: SearchPaths, externs: Externs,
     let mut collector = Collector::new(input.to_owned(), cfgs, libs, externs,
                                        true, opts, maybe_sysroot, None,
                                        Some(PathBuf::from(input)),
-                                       linker);
+                                       linker, edition);
     find_testable_code(&input_str, &mut collector, DUMMY_SP, None);
     test_args.insert(0, "rustdoctest".to_string());
     testing::test_main(&test_args, collector.tests,

src/librustdoc/test.rs

@@ -123,7 +123,8 @@ pub fn run(input_path: &Path,
                                        maybe_sysroot,
                                        Some(codemap),
                                        None,
-                                       linker);
+                                       linker,
+                                       edition);
 
     {
         let map = hir::map::map_crate(&sess, &cstore, &mut hir_forest, &defs);
@@ -183,8 +184,7 @@ fn run_test(test: &str, cratename: &str, filename: &FileName, line: usize,
             externs: Externs,
             should_panic: bool, no_run: bool, as_test_harness: bool,
             compile_fail: bool, mut error_codes: Vec<String>, opts: &TestOptions,
-            maybe_sysroot: Option<PathBuf>,
-            linker: Option<PathBuf>) {
+            maybe_sysroot: Option<PathBuf>, linker: Option<PathBuf>, edition: Edition) {
     // the test harness wants its own `main` & top level functions, so
     // never wrap the test in `fn main() { ... }`
     let (test, line_offset) = make_test(test, Some(cratename), as_test_harness, opts);
@@ -210,6 +210,10 @@ fn run_test(test: &str, cratename: &str, filename: &FileName, line: usize,
         },
         test: as_test_harness,
         unstable_features: UnstableFeatures::from_environment(),
+        debugging_opts: config::DebuggingOptions {
+            edition,
+            ..config::basic_debugging_options()
+        },
         ..config::basic_options().clone()
     };
 
@@ -473,13 +477,14 @@ pub struct Collector {
     codemap: Option<Lrc<CodeMap>>,
     filename: Option<PathBuf>,
     linker: Option<PathBuf>,
+    edition: Edition,
 }
 
 impl Collector {
     pub fn new(cratename: String, cfgs: Vec<String>, libs: SearchPaths, externs: Externs,
                use_headers: bool, opts: TestOptions, maybe_sysroot: Option<PathBuf>,
                codemap: Option<Lrc<CodeMap>>, filename: Option<PathBuf>,
-               linker: Option<PathBuf>) -> Collector {
+               linker: Option<PathBuf>, edition: Edition) -> Collector {
         Collector {
             tests: Vec::new(),
             names: Vec::new(),
@@ -494,6 +499,7 @@ impl Collector {
             codemap,
             filename,
             linker,
+            edition,
         }
     }
 
@@ -513,6 +519,7 @@ impl Collector {
         let opts = self.opts.clone();
         let maybe_sysroot = self.maybe_sysroot.clone();
         let linker = self.linker.clone();
+        let edition = self.edition;
         debug!("Creating test {}: {}", name, test);
         self.tests.push(testing::TestDescAndFn {
             desc: testing::TestDesc {
@@ -543,7 +550,8 @@ impl Collector {
                                  error_codes,
                                  &opts,
                                  maybe_sysroot,
-                                 linker)
+                                 linker,
+                                 edition)
                     }))
                 } {
                     Ok(()) => (),