Remove the fallback bundle

compiler/rustc_driver_impl/src/lib.rs

@@ -108,11 +108,9 @@ use crate::session_diagnostics::{
 };
 
 pub fn default_translator() -> Translator {
-    Translator::with_fallback_bundle(DEFAULT_LOCALE_RESOURCES.to_vec(), false)
+    Translator::new()
 }
 
-pub static DEFAULT_LOCALE_RESOURCES: &[&str] = &[];
-
 /// Exit status code used for successful compilation and help output.
 pub const EXIT_SUCCESS: i32 = 0;
 
@@ -219,7 +217,6 @@ pub fn run_compiler(at_args: &[String], callbacks: &mut (dyn Callbacks + Send))
         output_dir: odir,
         ice_file,
         file_loader: None,
-        locale_resources: DEFAULT_LOCALE_RESOURCES.to_vec(),
         lint_caps: Default::default(),
         psess_created: None,
         hash_untracked_state: None,
@@ -1528,7 +1525,7 @@ fn report_ice(
     extra_info: fn(&DiagCtxt),
     using_internal_features: &AtomicBool,
 ) {
-    let translator = default_translator();
+    let translator = Translator::new();
     let emitter =
         Box::new(rustc_errors::annotate_snippet_emitter_writer::AnnotateSnippetEmitter::new(
             stderr_destination(rustc_errors::ColorConfig::Auto),

compiler/rustc_errors/src/json/tests.rs

@@ -45,7 +45,7 @@ fn test_positions(code: &str, span: (u32, u32), expected_output: SpanTestData) {
     rustc_span::create_default_session_globals_then(|| {
         let sm = Arc::new(SourceMap::new(FilePathMapping::empty()));
         sm.new_source_file(filename(&sm, "test.rs"), code.to_owned());
-        let translator = Translator::with_fallback_bundle(vec![], false);
+        let translator = Translator::new();
 
         let output = Arc::new(Mutex::new(Vec::new()));
         let je = JsonEmitter::new(

compiler/rustc_errors/src/translation.rs

@@ -34,24 +34,11 @@ pub struct Translator {
     /// Localized diagnostics for the locale requested by the user. If no language was requested by
     /// the user then this will be `None` and `fallback_fluent_bundle` should be used.
     pub fluent_bundle: Option<Arc<FluentBundle>>,
-    /// Return `FluentBundle` with localized diagnostics for the default locale of the compiler.
-    /// Used when the user has not requested a specific language or when a localized diagnostic is
-    /// unavailable for the requested locale.
-    pub fallback_fluent_bundle: LazyFallbackBundle,
 }
 
 impl Translator {
-    pub fn with_fallback_bundle(
+    pub fn new() -> Translator {
-        resources: Vec<&'static str>,
+        Translator { fluent_bundle: None }
-        with_directionality_markers: bool,
-    ) -> Translator {
-        Translator {
-            fluent_bundle: None,
-            fallback_fluent_bundle: crate::fallback_fluent_bundle(
-                resources,
-                with_directionality_markers,
-            ),
-        }
     }
 
     /// Convert `DiagMessage`s to a string, performing translation if necessary.

compiler/rustc_interface/src/interface.rs

@@ -332,9 +332,6 @@ pub struct Config {
     /// bjorn3 for "hooking rust-analyzer's VFS into rustc at some point for
     /// running rustc without having to save". (See #102759.)
     pub file_loader: Option<Box<dyn FileLoader + Send + Sync>>,
-    /// The list of fluent resources, used for lints declared with
-    /// [`Diagnostic`](rustc_errors::Diagnostic) and [`LintDiagnostic`](rustc_errors::LintDiagnostic).
-    pub locale_resources: Vec<&'static str>,
 
     pub lint_caps: FxHashMap<lint::LintId, lint::Level>,
 
@@ -458,7 +455,6 @@ pub fn run_compiler<R: Send>(config: Config, f: impl FnOnce(&Compiler) -> R + Se
                     temps_dir,
                 },
                 bundle,
-                config.locale_resources,
                 config.lint_caps,
                 target,
                 util::rustc_version_str().unwrap_or("unknown"),

compiler/rustc_interface/src/tests.rs

@@ -72,7 +72,6 @@ where
             sessopts,
             io,
             None,
-            vec![],
             Default::default(),
             target,
             "",

compiler/rustc_parse/src/parser/tests.rs

@@ -42,7 +42,7 @@ fn string_to_parser(psess: &ParseSess, source_str: String) -> Parser<'_> {
 fn create_test_handler(theme: OutputTheme) -> (DiagCtxt, Arc<SourceMap>, Arc<Mutex<Vec<u8>>>) {
     let output = Arc::new(Mutex::new(Vec::new()));
     let source_map = Arc::new(SourceMap::new(FilePathMapping::empty()));
-    let translator = Translator::with_fallback_bundle(vec![], false);
+    let translator = Translator::new();
     let shared: Box<dyn Write + Send> = Box::new(Shared { data: output.clone() });
     let auto_stream = AutoStream::never(shared);
     let dcx = DiagCtxt::new(Box::new(
@@ -89,7 +89,7 @@ where
 
 /// Maps a string to tts, using a made-up filename.
 pub(crate) fn string_to_stream(source_str: String) -> TokenStream {
-    let psess = ParseSess::new(vec![]);
+    let psess = ParseSess::new();
     unwrap_or_emit_fatal(source_str_to_stream(
         &psess,
         filename(psess.source_map(), "bogofile"),
@@ -2239,12 +2239,12 @@ fn sp(a: u32, b: u32) -> Span {
 
 /// Parses a string, return an expression.
 fn string_to_expr(source_str: String) -> Box<ast::Expr> {
-    with_error_checking_parse(source_str, &ParseSess::new(vec![]), |p| p.parse_expr())
+    with_error_checking_parse(source_str, &ParseSess::new(), |p| p.parse_expr())
 }
 
 /// Parses a string, returns an item.
 fn string_to_item(source_str: String) -> Option<Box<ast::Item>> {
-    with_error_checking_parse(source_str, &ParseSess::new(vec![]), |p| {
+    with_error_checking_parse(source_str, &ParseSess::new(), |p| {
         p.parse_item(ForceCollect::No, AllowConstBlockItems::Yes)
     })
 }
@@ -2480,7 +2480,7 @@ let mut fflags: c_int = wb();
 #[test]
 fn crlf_doc_comments() {
     create_default_session_globals_then(|| {
-        let psess = ParseSess::new(vec![]);
+        let psess = ParseSess::new();
 
         let name_1 = FileName::Custom("crlf_source_1".to_string());
         let source = "/// doc comment\r\nfn foo() {}".to_string();
@@ -2515,7 +2515,7 @@ fn ttdelim_span() {
     }
 
     create_default_session_globals_then(|| {
-        let psess = ParseSess::new(vec![]);
+        let psess = ParseSess::new();
         let expr = parse_expr_from_source_str(
             filename(psess.source_map(), "foo"),
             "foo!( fn main() { body } )".to_string(),
@@ -2551,7 +2551,7 @@ fn look_ahead() {
         let sym_S = Symbol::intern("S");
         let raw_no = IdentIsRaw::No;
 
-        let psess = ParseSess::new(vec![]);
+        let psess = ParseSess::new();
         let mut p = string_to_parser(&psess, "fn f(x: u32) { x } struct S;".to_string());
 
         // Current position is the `fn`.
@@ -2626,7 +2626,7 @@ fn look_ahead_non_outermost_stream() {
         let sym_S = Symbol::intern("S");
         let raw_no = IdentIsRaw::No;
 
-        let psess = ParseSess::new(vec![]);
+        let psess = ParseSess::new();
         let mut p = string_to_parser(&psess, "mod m { fn f(x: u32) { x } struct S; }".to_string());
 
         // Move forward to the `fn`, which is not within the outermost token
@@ -2658,7 +2658,7 @@ fn look_ahead_non_outermost_stream() {
 #[test]
 fn debug_lookahead() {
     create_default_session_globals_then(|| {
-        let psess = ParseSess::new(vec![]);
+        let psess = ParseSess::new();
         let mut p = string_to_parser(&psess, "fn f(x: u32) { x } struct S;".to_string());
 
         // Current position is the `fn`.
@@ -2879,7 +2879,7 @@ fn debug_lookahead() {
 #[test]
 fn out_of_line_mod() {
     create_default_session_globals_then(|| {
-        let psess = ParseSess::new(vec![]);
+        let psess = ParseSess::new();
         let item = parse_item_from_source_str(
             filename(psess.source_map(), "foo"),
             "mod foo { struct S; mod this_does_not_exist; }".to_owned(),

compiler/rustc_session/src/parse.rs

@@ -280,8 +280,8 @@ pub struct ParseSess {
 
 impl ParseSess {
     /// Used for testing.
-    pub fn new(locale_resources: Vec<&'static str>) -> Self {
+    pub fn new() -> Self {
-        let translator = Translator::with_fallback_bundle(locale_resources, false);
+        let translator = Translator::new();
         let sm = Arc::new(SourceMap::new(FilePathMapping::empty()));
         let emitter = Box::new(
             AnnotateSnippetEmitter::new(stderr_destination(ColorConfig::Auto), translator)
@@ -314,7 +314,7 @@ impl ParseSess {
     }
 
     pub fn emitter_with_note(note: String) -> Self {
-        let translator = Translator::with_fallback_bundle(vec![], false);
+        let translator = Translator::new();
         let sm = Arc::new(SourceMap::new(FilePathMapping::empty()));
         let emitter = Box::new(AnnotateSnippetEmitter::new(
             stderr_destination(ColorConfig::Auto),

compiler/rustc_session/src/session.rs

@@ -19,7 +19,7 @@ use rustc_errors::timings::TimingSectionHandler;
 use rustc_errors::translation::Translator;
 use rustc_errors::{
     Diag, DiagCtxt, DiagCtxtHandle, DiagMessage, Diagnostic, ErrorGuaranteed, FatalAbort,
-    TerminalUrl, fallback_fluent_bundle,
+    TerminalUrl,
 };
 use rustc_hir::limit::Limit;
 use rustc_macros::HashStable_Generic;
@@ -967,7 +967,6 @@ pub fn build_session(
     sopts: config::Options,
     io: CompilerIO,
     fluent_bundle: Option<Arc<rustc_errors::FluentBundle>>,
-    fluent_resources: Vec<&'static str>,
     driver_lint_caps: FxHashMap<lint::LintId, lint::Level>,
     target: Target,
     cfg_version: &'static str,
@@ -985,13 +984,7 @@ pub fn build_session(
     let cap_lints_allow = sopts.lint_cap.is_some_and(|cap| cap == lint::Allow);
     let can_emit_warnings = !(warnings_allow || cap_lints_allow);
 
-    let translator = Translator {
+    let translator = Translator { fluent_bundle };
-        fluent_bundle,
-        fallback_fluent_bundle: fallback_fluent_bundle(
-            fluent_resources,
-            sopts.unstable_opts.translate_directionality_markers,
-        ),
-    };
     let source_map = rustc_span::source_map::get_source_map().unwrap();
     let emitter = default_emitter(&sopts, Arc::clone(&source_map), translator);
 
@@ -1430,7 +1423,7 @@ impl EarlyDiagCtxt {
 fn mk_emitter(output: ErrorOutputType) -> Box<DynEmitter> {
     // FIXME(#100717): early errors aren't translated at the moment, so this is fine, but it will
     // need to reference every crate that might emit an early error for translation to work.
-    let translator = Translator::with_fallback_bundle(vec![], false);
+    let translator = Translator::new();
     let emitter: Box<DynEmitter> = match output {
         config::ErrorOutputType::HumanReadable { kind, color_config } => match kind {
             HumanReadableErrorType { short, unicode } => Box::new(

src/librustdoc/clean/render_macro_matchers.rs

@@ -63,7 +63,7 @@ fn snippet_equal_to_token(tcx: TyCtxt<'_>, matcher: &TokenTree) -> Option<String
     let snippet = source_map.span_to_snippet(span).ok()?;
 
     // Create a Parser.
-    let psess = ParseSess::new(rustc_driver::DEFAULT_LOCALE_RESOURCES.to_vec());
+    let psess = ParseSess::new();
     let file_name = FileName::macro_expansion_source_code(&snippet);
     let mut parser = match rustc_parse::new_parser_from_source_str(
         &psess,

src/librustdoc/core.rs

@@ -289,7 +289,6 @@ pub(crate) fn create_config(
         output_file: None,
         output_dir: None,
         file_loader: None,
-        locale_resources: rustc_driver::DEFAULT_LOCALE_RESOURCES.to_vec(),
         lint_caps,
         psess_created: None,
         hash_untracked_state: None,

src/librustdoc/doctest.rs

@@ -188,7 +188,6 @@ pub(crate) fn run(dcx: DiagCtxtHandle<'_>, input: Input, options: RustdocOptions
         output_file: None,
         output_dir: None,
         file_loader: None,
-        locale_resources: rustc_driver::DEFAULT_LOCALE_RESOURCES.to_vec(),
         lint_caps,
         psess_created: None,
         hash_untracked_state: None,

tests/ui-fulldeps/mod_dir_path_canonicalized.rs

@@ -29,7 +29,7 @@ pub fn main() {
 }
 
 fn parse() {
-    let psess = ParseSess::new(vec![]);
+    let psess = ParseSess::new();
 
     let path = Path::new(file!());
     let path = path.canonicalize().unwrap();

tests/ui-fulldeps/pprust-expr-roundtrip.rs

@@ -219,7 +219,7 @@ fn main() {
 }
 
 fn run() {
-    let psess = ParseSess::new(vec![]);
+    let psess = ParseSess::new();
 
     iter_exprs(2, &mut |mut e| {
         // If the pretty printer is correct, then `parse(print(e))` should be identical to `e`,

tests/ui-fulldeps/pprust-parenthesis-insertion.rs

@@ -196,7 +196,7 @@ fn main() -> ExitCode {
     };
 
     rustc_span::create_default_session_globals_then(|| {
-        let psess = &ParseSess::new(vec![]);
+        let psess = &ParseSess::new();
 
         for &source_code in EXPRS {
             let Some(expr) = parse_expr(psess, source_code) else {

tests/ui-fulldeps/run-compiler-twice.rs

@@ -64,7 +64,6 @@ fn compile(code: String, output: PathBuf, sysroot: Sysroot, linker: Option<&Path
         output_dir: None,
         ice_file: None,
         file_loader: None,
-        locale_resources: Vec::new(),
         lint_caps: Default::default(),
         psess_created: None,
         hash_untracked_state: None,