Rollup of 7 pull requests

CODE_OF_CONDUCT.md

@@ -1,40 +1,3 @@
 # The Rust Code of Conduct
 
-A version of this document [can be found online](https://www.rust-lang.org/conduct.html).
-
-## Conduct
-
-**Contact**: [rust-mods@rust-lang.org](mailto:rust-mods@rust-lang.org)
-
-* We are committed to providing a friendly, safe and welcoming environment for all, regardless of level of experience, gender identity and expression, sexual orientation, disability, personal appearance, body size, race, ethnicity, age, religion, nationality, or other similar characteristic.
-* On IRC, please avoid using overtly sexual nicknames or other nicknames that might detract from a friendly, safe and welcoming environment for all.
-* Please be kind and courteous. There's no need to be mean or rude.
-* Respect that people have differences of opinion and that every design or implementation choice carries a trade-off and numerous costs. There is seldom a right answer.
-* Please keep unstructured critique to a minimum. If you have solid ideas you want to experiment with, make a fork and see how it works.
-* We will exclude you from interaction if you insult, demean or harass anyone. That is not welcome behavior. We interpret the term "harassment" as including the definition in the <a href="http://citizencodeofconduct.org/">Citizen Code of Conduct</a>; if you have any lack of clarity about what might be included in that concept, please read their definition. In particular, we don't tolerate behavior that excludes people in socially marginalized groups.
-* Private harassment is also unacceptable. No matter who you are, if you feel you have been or are being harassed or made uncomfortable by a community member, please contact one of the channel ops or any of the [Rust moderation team][mod_team] immediately. Whether you're a regular contributor or a newcomer, we care about making this community a safe place for you and we've got your back.
-* Likewise any spamming, trolling, flaming, baiting or other attention-stealing behavior is not welcome.
-
-## Moderation
-
-
-These are the policies for upholding our community's standards of conduct. If you feel that a thread needs moderation, please contact the [Rust moderation team][mod_team].
-
-1. Remarks that violate the Rust standards of conduct, including hateful, hurtful, oppressive, or exclusionary remarks, are not allowed. (Cursing is allowed, but never targeting another user, and never in a hateful manner.)
-2. Remarks that moderators find inappropriate, whether listed in the code of conduct or not, are also not allowed.
-3. Moderators will first respond to such remarks with a warning.
-4. If the warning is unheeded, the user will be "kicked," i.e., kicked out of the communication channel to cool off.
-5. If the user comes back and continues to make trouble, they will be banned, i.e., indefinitely excluded.
-6. Moderators may choose at their discretion to un-ban the user if it was a first offense and they offer the offended party a genuine apology.
-7. If a moderator bans someone and you think it was unjustified, please take it up with that moderator, or with a different moderator, **in private**. Complaints about bans in-channel are not allowed.
-8. Moderators are held to a higher standard than other community members. If a moderator creates an inappropriate situation, they should expect less leeway than others.
-
-In the Rust community we strive to go the extra step to look out for each other. Don't just aim to be technically unimpeachable, try to be your best self. In particular, avoid flirting with offensive or sensitive issues, particularly if they're off-topic; this all too often leads to unnecessary fights, hurt feelings, and damaged trust; worse, it can drive people away from the community entirely.
-
-And if someone takes issue with something you said or did, resist the urge to be defensive. Just stop doing what it was they complained about and apologize. Even if you feel you were misinterpreted or unfairly accused, chances are good there was something you could've communicated better — remember that it's your responsibility to make your fellow Rustaceans comfortable. Everyone wants to get along and we are all here first and foremost because we want to talk about cool technology. You will find that people will be eager to assume good intent and forgive as long as you earn their trust.
-
-The enforcement policies listed above apply to all official Rust venues; including all communication channels (Rust Discord server, Rust Zulip server); GitHub repositories under rust-lang, rust-lang-nursery, and rust-lang-deprecated; and all forums under rust-lang.org (users.rust-lang.org, internals.rust-lang.org). For other projects adopting the Rust Code of Conduct, please contact the maintainers of those projects for enforcement. If you wish to use this code of conduct for your own project, consider explicitly mentioning your moderation policy or making a copy with your own moderation policy so as to avoid confusion.
-
-*Adapted from the [Node.js Policy on Trolling](https://blog.izs.me/2012/08/policy-on-trolling) as well as the [Contributor Covenant v1.3.0](https://www.contributor-covenant.org/version/1/3/0/).*
-
-[mod_team]: https://www.rust-lang.org/team.html#Moderation-team
+The Code of Conduct for this repository [can be found online](https://www.rust-lang.org/conduct.html).

src/librustc/dep_graph/graph.rs

@@ -9,7 +9,6 @@ use std::hash::Hash;
 use std::collections::hash_map::Entry;
 use std::mem;
 use crate::ty::{self, TyCtxt};
-use crate::util::common::{ProfileQueriesMsg, profq_msg};
 use parking_lot::{Mutex, Condvar};
 
 use crate::ich::{StableHashingContext, StableHashingContextProvider, Fingerprint};
@@ -256,10 +255,6 @@ impl DepGraph {
             //  - we can get an idea of the runtime cost.
             let mut hcx = cx.get_stable_hashing_context();
 
-            if cfg!(debug_assertions) {
-                profq_msg(hcx.sess(), ProfileQueriesMsg::TaskBegin(key.clone()))
-            };
-
             let result = if no_tcx {
                 task(cx, arg)
             } else {
@@ -275,10 +270,6 @@ impl DepGraph {
                 })
             };
 
-            if cfg!(debug_assertions) {
-                profq_msg(hcx.sess(), ProfileQueriesMsg::TaskEnd)
-            };
-
             let current_fingerprint = hash_result(&mut hcx, &result);
 
             let dep_node_index = finish_task_and_alloc_depnode(

src/librustc/error_codes.rs

@@ -466,7 +466,6 @@ fn main() {
 ```
 "##,
 
-
 E0139: r##"
 #### Note: this error code is no longer emitted by the compiler.
 
@@ -1562,7 +1561,9 @@ fn transmute_lifetime<'a, T>(t: &'a (T,)) -> &'a T {
 "##,
 
 E0496: r##"
-A lifetime name is shadowing another lifetime name. Erroneous code example:
+A lifetime name is shadowing another lifetime name.
+
+Erroneous code example:
 
 ```compile_fail,E0496
 struct Foo<'a> {
@@ -1594,8 +1595,11 @@ fn main() {
 "##,
 
 E0497: r##"
-A stability attribute was used outside of the standard library. Erroneous code
-example:
+#### Note: this error code is no longer emitted by the compiler.
+
+A stability attribute was used outside of the standard library.
+
+Erroneous code example:
 
 ```compile_fail
 #[stable] // error: stability attributes may not be used outside of the
@@ -2125,7 +2129,7 @@ rejected in your own crates.
 //  E0272, // on_unimplemented #0
 //  E0273, // on_unimplemented #1
 //  E0274, // on_unimplemented #2
-    E0278, // requirement is not satisfied
+//  E0278, // requirement is not satisfied
     E0279, // requirement is not satisfied
     E0280, // requirement is not satisfied
 //  E0285, // overflow evaluation builtin bounds
@@ -2165,10 +2169,10 @@ rejected in your own crates.
     E0687, // in-band lifetimes cannot be used in `fn`/`Fn` syntax
     E0688, // in-band lifetimes cannot be mixed with explicit lifetime binders
     E0697, // closures cannot be static
-    E0707, // multiple elided lifetimes used in arguments of `async fn`
+//  E0707, // multiple elided lifetimes used in arguments of `async fn`
     E0708, // `async` non-`move` closures with parameters are not currently
            // supported
-    E0709, // multiple different lifetimes used in arguments of `async fn`
+//  E0709, // multiple different lifetimes used in arguments of `async fn`
     E0710, // an unknown tool name found in scoped lint
     E0711, // a feature has been declared with conflicting stability attributes
 //  E0702, // replaced with a generic attribute input check

src/librustc/hir/mod.rs

@@ -1548,6 +1548,19 @@ impl Expr {
             }
         }
     }
+
+    /// If `Self.kind` is `ExprKind::DropTemps(expr)`, drill down until we get a non-`DropTemps`
+    /// `Expr`. This is used in suggestions to ignore this `ExprKind` as it is semantically
+    /// silent, only signaling the ownership system. By doing this, suggestions that check the
+    /// `ExprKind` of any given `Expr` for presentation don't have to care about `DropTemps`
+    /// beyond remembering to call this function before doing analysis on it.
+    pub fn peel_drop_temps(&self) -> &Self {
+        let mut expr = self;
+        while let ExprKind::DropTemps(inner) = &expr.kind {
+            expr = inner;
+        }
+        expr
+    }
 }
 
 impl fmt::Debug for Expr {

src/librustc/lint/builtin.rs

@@ -368,6 +368,12 @@ pub mod parser {
         Allow,
         "possible meta-variable misuse at macro definition"
     }
+
+    declare_lint! {
+        pub INCOMPLETE_INCLUDE,
+        Deny,
+        "trailing content in included file"
+    }
 }
 
 declare_lint! {

src/librustc/lint/mod.rs

@@ -28,6 +28,7 @@ use crate::hir::intravisit;
 use crate::hir;
 use crate::lint::builtin::BuiltinLintDiagnostics;
 use crate::lint::builtin::parser::{ILL_FORMED_ATTRIBUTE_INPUT, META_VARIABLE_MISUSE};
+use crate::lint::builtin::parser::INCOMPLETE_INCLUDE;
 use crate::session::{Session, DiagnosticMessageId};
 use crate::ty::TyCtxt;
 use crate::ty::query::Providers;
@@ -83,6 +84,7 @@ impl Lint {
         match lint_id {
             BufferedEarlyLintId::IllFormedAttributeInput => ILL_FORMED_ATTRIBUTE_INPUT,
             BufferedEarlyLintId::MetaVariableMisuse => META_VARIABLE_MISUSE,
+            BufferedEarlyLintId::IncompleteInclude => INCOMPLETE_INCLUDE,
         }
     }
 

src/librustc/session/config.rs

@@ -1316,10 +1316,6 @@ options! {DebuggingOptions, DebuggingSetter, basic_debugging_options,
         "dump the dependency graph to $RUST_DEP_GRAPH (default: /tmp/dep_graph.gv)"),
     query_dep_graph: bool = (false, parse_bool, [UNTRACKED],
         "enable queries of the dependency graph for regression testing"),
-    profile_queries: bool = (false, parse_bool, [UNTRACKED],
-        "trace and profile the queries of the incremental compilation framework"),
-    profile_queries_and_keys: bool = (false, parse_bool, [UNTRACKED],
-        "trace and profile the queries and keys of the incremental compilation framework"),
     no_analysis: bool = (false, parse_bool, [UNTRACKED],
         "parse and expand the source, but run no analysis"),
     extra_plugins: Vec<String> = (Vec::new(), parse_list, [TRACKED],

src/librustc/session/mod.rs

@@ -11,7 +11,6 @@ use crate::session::config::{OutputType, PrintRequest, SwitchWithOptPath};
 use crate::session::search_paths::{PathKind, SearchPath};
 use crate::util::nodemap::{FxHashMap, FxHashSet};
 use crate::util::common::{duration_to_secs_str, ErrorReported};
-use crate::util::common::ProfileQueriesMsg;
 
 use rustc_data_structures::base_n;
 use rustc_data_structures::sync::{
@@ -46,7 +45,7 @@ use std::fmt;
 use std::io::Write;
 use std::path::PathBuf;
 use std::time::Duration;
-use std::sync::{Arc, mpsc};
+use std::sync::Arc;
 
 mod code_stats;
 pub mod config;
@@ -125,9 +124,6 @@ pub struct Session {
     /// `-Zquery-dep-graph` is specified.
     pub cgu_reuse_tracker: CguReuseTracker,
 
-    /// Used by `-Z profile-queries` in `util::common`.
-    pub profile_channel: Lock<Option<mpsc::Sender<ProfileQueriesMsg>>>,
-
     /// Used by `-Z self-profile`.
     pub prof: SelfProfilerRef,
 
@@ -509,13 +505,6 @@ impl Session {
     pub fn time_extended(&self) -> bool {
         self.opts.debugging_opts.time_passes
     }
-    pub fn profile_queries(&self) -> bool {
-        self.opts.debugging_opts.profile_queries
-            || self.opts.debugging_opts.profile_queries_and_keys
-    }
-    pub fn profile_queries_and_keys(&self) -> bool {
-        self.opts.debugging_opts.profile_queries_and_keys
-    }
     pub fn instrument_mcount(&self) -> bool {
         self.opts.debugging_opts.instrument_mcount
     }
@@ -1234,7 +1223,6 @@ fn build_session_(
         incr_comp_session: OneThread::new(RefCell::new(IncrCompSession::NotInitialized)),
         cgu_reuse_tracker,
         prof: SelfProfilerRef::new(self_profiler),
-        profile_channel: Lock::new(None),
         perf_stats: PerfStats {
             symbol_hash_time: Lock::new(Duration::from_secs(0)),
             decode_def_path_tables_time: Lock::new(Duration::from_secs(0)),

src/librustc/ty/query/on_disk_cache.rs

@@ -1075,7 +1075,7 @@ where
     let desc = &format!("encode_query_results for {}",
         ::std::any::type_name::<Q>());
 
-    time_ext(tcx.sess.time_extended(), Some(tcx.sess), desc, || {
+    time_ext(tcx.sess.time_extended(), desc, || {
         let shards = Q::query_cache(tcx).lock_shards();
         assert!(shards.iter().all(|shard| shard.active.is_empty()));
         for (key, entry) in shards.iter().flat_map(|shard| shard.results.iter()) {

src/librustc/ty/query/plumbing.rs

@@ -9,8 +9,6 @@ use crate::ty::query::Query;
 use crate::ty::query::config::{QueryConfig, QueryDescription};
 use crate::ty::query::job::{QueryJob, QueryResult, QueryInfo};
 
-use crate::util::common::{profq_msg, ProfileQueriesMsg, QueryMsg};
-
 use errors::DiagnosticBuilder;
 use errors::Level;
 use errors::Diagnostic;
@@ -62,33 +60,6 @@ impl<'tcx, M: QueryConfig<'tcx>> Default for QueryCache<'tcx, M> {
     }
 }
 
-// If enabled, sends a message to the profile-queries thread.
-macro_rules! profq_msg {
-    ($tcx:expr, $msg:expr) => {
-        if cfg!(debug_assertions) {
-            if $tcx.sess.profile_queries() {
-                profq_msg($tcx.sess, $msg)
-            }
-        }
-    }
-}
-
-// If enabled, formats a key using its debug string, which can be
-// expensive to compute (in terms of time).
-macro_rules! profq_query_msg {
-    ($query:expr, $tcx:expr, $key:expr) => {{
-        let msg = if cfg!(debug_assertions) {
-            if $tcx.sess.profile_queries_and_keys() {
-                Some(format!("{:?}", $key))
-            } else { None }
-        } else { None };
-        QueryMsg {
-            query: $query,
-            msg,
-        }
-    }}
-}
-
 /// A type representing the responsibility to execute the job in the `job` field.
 /// This will poison the relevant query if dropped.
 pub(super) struct JobOwner<'a, 'tcx, Q: QueryDescription<'tcx>> {
@@ -111,7 +82,6 @@ impl<'a, 'tcx, Q: QueryDescription<'tcx>> JobOwner<'a, 'tcx, Q> {
         loop {
             let mut lock = cache.get_shard_by_value(key).lock();
             if let Some(value) = lock.results.get(key) {
-                profq_msg!(tcx, ProfileQueriesMsg::CacheHit);
                 tcx.prof.query_cache_hit(Q::NAME);
                 let result = (value.value.clone(), value.index);
                 #[cfg(debug_assertions)]
@@ -358,13 +328,6 @@ impl<'tcx> TyCtxt<'tcx> {
                key,
                span);
 
-        profq_msg!(self,
-            ProfileQueriesMsg::QueryBegin(
-                span.data(),
-                profq_query_msg!(Q::NAME.as_str(), self, key),
-            )
-        );
-
         let job = match JobOwner::try_get(self, span, &key) {
             TryGetJob::NotYetStarted(job) => job,
             TryGetJob::Cycle(result) => return result,
@@ -383,7 +346,6 @@ impl<'tcx> TyCtxt<'tcx> {
 
         if Q::ANON {
 
-            profq_msg!(self, ProfileQueriesMsg::ProviderBegin);
             let prof_timer = self.prof.query_provider(Q::NAME);
 
             let ((result, dep_node_index), diagnostics) = with_diagnostics(|diagnostics| {
@@ -395,7 +357,6 @@ impl<'tcx> TyCtxt<'tcx> {
             });
 
             drop(prof_timer);
-            profq_msg!(self, ProfileQueriesMsg::ProviderEnd);
 
             self.dep_graph.read_index(dep_node_index);
 
@@ -468,7 +429,6 @@ impl<'tcx> TyCtxt<'tcx> {
         };
 
         let result = if let Some(result) = result {
-            profq_msg!(self, ProfileQueriesMsg::CacheHit);
             result
         } else {
             // We could not load a result from the on-disk cache, so
@@ -542,7 +502,6 @@ impl<'tcx> TyCtxt<'tcx> {
                  - dep-node: {:?}",
                 key, dep_node);
 
-        profq_msg!(self, ProfileQueriesMsg::ProviderBegin);
         let prof_timer = self.prof.query_provider(Q::NAME);
 
         let ((result, dep_node_index), diagnostics) = with_diagnostics(|diagnostics| {
@@ -564,7 +523,6 @@ impl<'tcx> TyCtxt<'tcx> {
         });
 
         drop(prof_timer);
-        profq_msg!(self, ProfileQueriesMsg::ProviderEnd);
 
         if unlikely!(!diagnostics.is_empty()) {
             if dep_node.kind != crate::dep_graph::DepKind::Null {
@@ -606,19 +564,12 @@ impl<'tcx> TyCtxt<'tcx> {
 
             let _ = self.get_query::<Q>(DUMMY_SP, key);
         } else {
-            profq_msg!(self, ProfileQueriesMsg::CacheHit);
             self.prof.query_cache_hit(Q::NAME);
         }
     }
 
     #[allow(dead_code)]
     fn force_query<Q: QueryDescription<'tcx>>(self, key: Q::Key, span: Span, dep_node: DepNode) {
-        profq_msg!(
-            self,
-            ProfileQueriesMsg::QueryBegin(span.data(),
-                                          profq_query_msg!(Q::NAME.as_str(), self, key))
-        );
-
         // We may be concurrently trying both execute and force a query.
         // Ensure that only one of them runs the query.
         let job = match JobOwner::try_get(self, span, &key) {