Rollup of 7 pull requests

compiler/rustc_borrowck/src/lib.rs

@@ -863,7 +863,6 @@ enum WriteKind {
 /// local place can be mutated.
 //
 // FIXME: @nikomatsakis suggested that this flag could be removed with the following modifications:
-// - Merge `check_access_permissions()` and `check_if_reassignment_to_immutable_state()`.
 // - Split `is_mutable()` into `is_assignable()` (can be directly assigned) and
 //   `is_declared_mutable()`.
 // - Take flow state into consideration in `is_assignable()` for local variables.
@@ -1132,20 +1131,6 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> {
         // Write of P[i] or *P requires P init'd.
         self.check_if_assigned_path_is_moved(location, place_span, flow_state);
 
-        // Special case: you can assign an immutable local variable
-        // (e.g., `x = ...`) so long as it has never been initialized
-        // before (at this point in the flow).
-        if let Some(local) = place_span.0.as_local() {
-            if let Mutability::Not = self.body.local_decls[local].mutability {
-                // check for reassignments to immutable local variables
-                self.check_if_reassignment_to_immutable_state(
-                    location, local, place_span, flow_state,
-                );
-                return;
-            }
-        }
-
-        // Otherwise, use the normal access permission rules.
         self.access_place(
             location,
             place_span,
@@ -1554,24 +1539,6 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> {
         }
     }
 
-    fn check_if_reassignment_to_immutable_state(
-        &mut self,
-        location: Location,
-        local: Local,
-        place_span: (Place<'tcx>, Span),
-        flow_state: &Flows<'cx, 'tcx>,
-    ) {
-        debug!("check_if_reassignment_to_immutable_state({:?})", local);
-
-        // Check if any of the initializations of `local` have happened yet:
-        if let Some(init_index) = self.is_local_ever_initialized(local, flow_state) {
-            // And, if so, report an error.
-            let init = &self.move_data.inits[init_index];
-            let span = init.span(&self.body);
-            self.report_illegal_reassignment(location, place_span, span, place_span.0);
-        }
-    }
-
     fn check_if_full_path_is_moved(
         &mut self,
         location: Location,
@@ -2037,12 +2004,19 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> {
         // partial initialization, do not complain about mutability
         // errors except for actual mutation (as opposed to an attempt
         // to do a partial initialization).
-        let previously_initialized =
-            self.is_local_ever_initialized(place.local, flow_state).is_some();
+        let previously_initialized = self.is_local_ever_initialized(place.local, flow_state);
 
         // at this point, we have set up the error reporting state.
-        if previously_initialized {
-            self.report_mutability_error(place, span, the_place_err, error_access, location);
+        if let Some(init_index) = previously_initialized {
+            if let (AccessKind::Mutate, Some(_)) = (error_access, place.as_local()) {
+                // If this is a mutate access to an immutable local variable with no projections
+                // report the error as an illegal reassignment
+                let init = &self.move_data.inits[init_index];
+                let assigned_span = init.span(&self.body);
+                self.report_illegal_reassignment(location, (place, span), assigned_span, place);
+            } else {
+                self.report_mutability_error(place, span, the_place_err, error_access, location)
+            }
             true
         } else {
             false

library/std/src/lib.rs

@@ -14,7 +14,7 @@
 //! # How to read this documentation
 //!
 //! If you already know the name of what you are looking for, the fastest way to
-//! find it is to use the <a href="#" onclick="focusSearchBar();">search
+//! find it is to use the <a href="#" onclick="window.searchState.focus();">search
 //! bar</a> at the top of the page.
 //!
 //! Otherwise, you may want to jump to one of these useful sections:

library/test/src/console.rs

@@ -147,7 +147,7 @@ pub fn list_tests_console(opts: &TestOpts, tests: Vec<TestDescAndFn>) -> io::Res
     let mut ntest = 0;
     let mut nbench = 0;
 
-    for test in filter_tests(&opts, tests).into_iter() {
+    for test in filter_tests(opts, tests).into_iter() {
         use crate::TestFn::*;
 
         let TestDescAndFn { desc: TestDesc { name, .. }, testfn } = test;
@@ -244,7 +244,7 @@ fn on_test_event(
             let stdout = &completed_test.stdout;
 
             st.write_log_result(test, result, exec_time.as_ref())?;
-            out.write_result(test, result, exec_time.as_ref(), &*stdout, st)?;
+            out.write_result(test, result, exec_time.as_ref(), stdout, st)?;
             handle_test_result(st, completed_test);
         }
     }
@@ -262,7 +262,7 @@ pub fn run_tests_console(opts: &TestOpts, tests: Vec<TestDescAndFn>) -> io::Resu
 
     let max_name_len = tests
         .iter()
-        .max_by_key(|t| len_if_padded(*t))
+        .max_by_key(|t| len_if_padded(t))
         .map(|t| t.desc.name.as_slice().len())
         .unwrap_or(0);
 

library/test/src/formatters/json.rs

@@ -40,20 +40,20 @@ impl<T: Write> JsonFormatter<T> {
         extra: Option<&str>,
     ) -> io::Result<()> {
         // A doc test's name includes a filename which must be escaped for correct json.
-        self.write_message(&*format!(
+        self.write_message(&format!(
             r#"{{ "type": "{}", "name": "{}", "event": "{}""#,
             ty,
             EscapedString(name),
             evt
         ))?;
         if let Some(exec_time) = exec_time {
-            self.write_message(&*format!(r#", "exec_time": {}"#, exec_time.0.as_secs_f64()))?;
+            self.write_message(&format!(r#", "exec_time": {}"#, exec_time.0.as_secs_f64()))?;
         }
         if let Some(stdout) = stdout {
-            self.write_message(&*format!(r#", "stdout": "{}""#, EscapedString(stdout)))?;
+            self.write_message(&format!(r#", "stdout": "{}""#, EscapedString(stdout)))?;
         }
         if let Some(extra) = extra {
-            self.write_message(&*format!(r#", {extra}"#))?;
+            self.write_message(&format!(r#", {extra}"#))?;
         }
         self.writeln_message(" }")
     }
@@ -66,13 +66,13 @@ impl<T: Write> OutputFormatter for JsonFormatter<T> {
         } else {
             String::new()
         };
-        self.writeln_message(&*format!(
+        self.writeln_message(&format!(
             r#"{{ "type": "suite", "event": "started", "test_count": {test_count}{shuffle_seed_json} }}"#
         ))
     }
 
     fn write_test_start(&mut self, desc: &TestDesc) -> io::Result<()> {
-        self.writeln_message(&*format!(
+        self.writeln_message(&format!(
             r#"{{ "type": "test", "event": "started", "name": "{}" }}"#,
             EscapedString(desc.name.as_slice())
         ))
@@ -151,20 +151,20 @@ impl<T: Write> OutputFormatter for JsonFormatter<T> {
                     mbps
                 );
 
-                self.writeln_message(&*line)
+                self.writeln_message(&line)
             }
         }
     }
 
     fn write_timeout(&mut self, desc: &TestDesc) -> io::Result<()> {
-        self.writeln_message(&*format!(
+        self.writeln_message(&format!(
             r#"{{ "type": "test", "event": "timeout", "name": "{}" }}"#,
             EscapedString(desc.name.as_slice())
         ))
     }
 
     fn write_run_finish(&mut self, state: &ConsoleTestState) -> io::Result<bool> {
-        self.write_message(&*format!(
+        self.write_message(&format!(
             "{{ \"type\": \"suite\", \
              \"event\": \"{}\", \
              \"passed\": {}, \

library/test/src/formatters/junit.rs

@@ -64,7 +64,7 @@ impl<T: Write> OutputFormatter for JunitFormatter<T> {
     fn write_run_finish(&mut self, state: &ConsoleTestState) -> io::Result<bool> {
         self.write_message("<testsuites>")?;
 
-        self.write_message(&*format!(
+        self.write_message(&format!(
             "<testsuite name=\"test\" package=\"test\" id=\"0\" \
              errors=\"0\" \
              failures=\"{}\" \
@@ -73,12 +73,12 @@ impl<T: Write> OutputFormatter for JunitFormatter<T> {
              >",
             state.failed, state.total, state.ignored
         ))?;
-        for (desc, result, duration) in std::mem::replace(&mut self.results, Vec::new()) {
+        for (desc, result, duration) in std::mem::take(&mut self.results) {
             let (class_name, test_name) = parse_class_name(&desc);
             match result {
                 TestResult::TrIgnored => { /* no-op */ }
                 TestResult::TrFailed => {
-                    self.write_message(&*format!(
+                    self.write_message(&format!(
                         "<testcase classname=\"{}\" \
                          name=\"{}\" time=\"{}\">",
                         class_name,
@@ -90,19 +90,19 @@ impl<T: Write> OutputFormatter for JunitFormatter<T> {
                 }
 
                 TestResult::TrFailedMsg(ref m) => {
-                    self.write_message(&*format!(
+                    self.write_message(&format!(
                         "<testcase classname=\"{}\" \
                          name=\"{}\" time=\"{}\">",
                         class_name,
                         test_name,
                         duration.as_secs_f64()
                     ))?;
-                    self.write_message(&*format!("<failure message=\"{m}\" type=\"assert\"/>"))?;
+                    self.write_message(&format!("<failure message=\"{m}\" type=\"assert\"/>"))?;
                     self.write_message("</testcase>")?;
                 }
 
                 TestResult::TrTimedFail => {
-                    self.write_message(&*format!(
+                    self.write_message(&format!(
                         "<testcase classname=\"{}\" \
                          name=\"{}\" time=\"{}\">",
                         class_name,
@@ -114,15 +114,15 @@ impl<T: Write> OutputFormatter for JunitFormatter<T> {
                 }
 
                 TestResult::TrBench(ref b) => {
-                    self.write_message(&*format!(
+                    self.write_message(&format!(
                         "<testcase classname=\"benchmark::{}\" \
                          name=\"{}\" time=\"{}\" />",
                         class_name, test_name, b.ns_iter_summ.sum
                     ))?;
                 }
 
                 TestResult::TrOk => {
-                    self.write_message(&*format!(
+                    self.write_message(&format!(
                         "<testcase classname=\"{}\" \
                          name=\"{}\" time=\"{}\"/>",
                         class_name,

library/test/src/formatters/pretty.rs

@@ -134,7 +134,7 @@ impl<T: Write> PrettyFormatter<T> {
 
         let mut results = Vec::new();
         let mut stdouts = String::new();
-        for &(ref f, ref stdout) in inputs {
+        for (f, stdout) in inputs {
             results.push(f.name.to_string());
             if !stdout.is_empty() {
                 stdouts.push_str(&format!("---- {} stdout ----\n", f.name));
@@ -171,9 +171,9 @@ impl<T: Write> PrettyFormatter<T> {
     fn write_test_name(&mut self, desc: &TestDesc) -> io::Result<()> {
         let name = desc.padded_name(self.max_name_len, desc.name.padding());
         if let Some(test_mode) = desc.test_mode() {
-            self.write_plain(&format!("test {name} - {test_mode} ... "))?;
+            self.write_plain(format!("test {name} - {test_mode} ... "))?;
         } else {
-            self.write_plain(&format!("test {name} ... "))?;
+            self.write_plain(format!("test {name} ... "))?;
         }
 
         Ok(())
@@ -188,7 +188,7 @@ impl<T: Write> OutputFormatter for PrettyFormatter<T> {
         } else {
             String::new()
         };
-        self.write_plain(&format!("\nrunning {test_count} {noun}{shuffle_seed_msg}\n"))
+        self.write_plain(format!("\nrunning {test_count} {noun}{shuffle_seed_msg}\n"))
     }
 
     fn write_test_start(&mut self, desc: &TestDesc) -> io::Result<()> {
@@ -221,7 +221,7 @@ impl<T: Write> OutputFormatter for PrettyFormatter<T> {
             TestResult::TrIgnored => self.write_ignored(desc.ignore_message)?,
             TestResult::TrBench(ref bs) => {
                 self.write_bench()?;
-                self.write_plain(&format!(": {}", fmt_bench_samples(bs)))?;
+                self.write_plain(format!(": {}", fmt_bench_samples(bs)))?;
             }
             TestResult::TrTimedFail => self.write_time_failed()?,
         }
@@ -231,7 +231,7 @@ impl<T: Write> OutputFormatter for PrettyFormatter<T> {
     }
 
     fn write_timeout(&mut self, desc: &TestDesc) -> io::Result<()> {
-        self.write_plain(&format!(
+        self.write_plain(format!(
             "test {} has been running for over {} seconds\n",
             desc.name,
             time::TEST_WARN_TIMEOUT_S
@@ -267,11 +267,11 @@ impl<T: Write> OutputFormatter for PrettyFormatter<T> {
             state.passed, state.failed, state.ignored, state.measured, state.filtered_out
         );
 
-        self.write_plain(&s)?;
+        self.write_plain(s)?;
 
         if let Some(ref exec_time) = state.exec_time {
             let time_str = format!("; finished in {exec_time}");
-            self.write_plain(&time_str)?;
+            self.write_plain(time_str)?;
         }
 
         self.write_plain("\n\n")?;

library/test/src/formatters/terse.rs

@@ -70,7 +70,7 @@ impl<T: Write> TerseFormatter<T> {
             // screen when dealing with line-buffered output (e.g., piping to
             // `stamp` in the rust CI).
             let out = format!(" {}/{}\n", self.test_count + 1, self.total_test_count);
-            self.write_plain(&out)?;
+            self.write_plain(out)?;
         }
 
         self.test_count += 1;
@@ -106,7 +106,7 @@ impl<T: Write> TerseFormatter<T> {
         self.write_plain("\nsuccesses:\n")?;
         let mut successes = Vec::new();
         let mut stdouts = String::new();
-        for &(ref f, ref stdout) in &state.not_failures {
+        for (f, stdout) in &state.not_failures {
             successes.push(f.name.to_string());
             if !stdout.is_empty() {
                 stdouts.push_str(&format!("---- {} stdout ----\n", f.name));
@@ -132,7 +132,7 @@ impl<T: Write> TerseFormatter<T> {
         self.write_plain("\nfailures:\n")?;
         let mut failures = Vec::new();
         let mut fail_out = String::new();
-        for &(ref f, ref stdout) in &state.failures {
+        for (f, stdout) in &state.failures {
             failures.push(f.name.to_string());
             if !stdout.is_empty() {
                 fail_out.push_str(&format!("---- {} stdout ----\n", f.name));
@@ -157,9 +157,9 @@ impl<T: Write> TerseFormatter<T> {
     fn write_test_name(&mut self, desc: &TestDesc) -> io::Result<()> {
         let name = desc.padded_name(self.max_name_len, desc.name.padding());
         if let Some(test_mode) = desc.test_mode() {
-            self.write_plain(&format!("test {name} - {test_mode} ... "))?;
+            self.write_plain(format!("test {name} - {test_mode} ... "))?;
         } else {
-            self.write_plain(&format!("test {name} ... "))?;
+            self.write_plain(format!("test {name} ... "))?;
         }
 
         Ok(())
@@ -175,7 +175,7 @@ impl<T: Write> OutputFormatter for TerseFormatter<T> {
         } else {
             String::new()
         };
-        self.write_plain(&format!("\nrunning {test_count} {noun}{shuffle_seed_msg}\n"))
+        self.write_plain(format!("\nrunning {test_count} {noun}{shuffle_seed_msg}\n"))
     }
 
     fn write_test_start(&mut self, desc: &TestDesc) -> io::Result<()> {
@@ -209,13 +209,13 @@ impl<T: Write> OutputFormatter for TerseFormatter<T> {
                     self.write_test_name(desc)?;
                 }
                 self.write_bench()?;
-                self.write_plain(&format!(": {}\n", fmt_bench_samples(bs)))
+                self.write_plain(format!(": {}\n", fmt_bench_samples(bs)))
             }
         }
     }
 
     fn write_timeout(&mut self, desc: &TestDesc) -> io::Result<()> {
-        self.write_plain(&format!(
+        self.write_plain(format!(
             "test {} has been running for over {} seconds\n",
             desc.name,
             time::TEST_WARN_TIMEOUT_S
@@ -245,11 +245,11 @@ impl<T: Write> OutputFormatter for TerseFormatter<T> {
             state.passed, state.failed, state.ignored, state.measured, state.filtered_out
         );
 
-        self.write_plain(&s)?;
+        self.write_plain(s)?;
 
         if let Some(ref exec_time) = state.exec_time {
             let time_str = format!("; finished in {exec_time}");
-            self.write_plain(&time_str)?;
+            self.write_plain(time_str)?;
         }
 
         self.write_plain("\n\n")?;

library/test/src/lib.rs

@@ -789,7 +789,7 @@ fn run_test_in_spawned_subprocess(
         }
     });
     let record_result2 = record_result.clone();
-    panic::set_hook(Box::new(move |info| record_result2(Some(&info))));
+    panic::set_hook(Box::new(move |info| record_result2(Some(info))));
     if let Err(message) = testfn() {
         panic!("{}", message);
     }