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Auto merge of #107542 - compiler-errors:param-envs-with-inference-vars-are-cursed, r=jackh726

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Don't call `with_reveal_all_normalized` in const-eval when `param_env` has inference vars in it

**what:** This slightly shifts the order of operations from an existing hack:

5b6ed253c4/compiler/rustc_middle/src/ty/consts/kind.rs (L225-L230)

in order to avoid calling a tcx query (`TyCtxt::reveal_opaque_types_in_bounds`, via `ParamEnv::with_reveal_all_normalized`) when a param-env has inference variables in it.

**why:** This allows us to enable fingerprinting of query keys/values outside of incr-comp in deubg mode, to make sure we catch other places where we're passing infer vars and other bad things into query keys. Currently that (bbf33836b9) crashes because we introduce inference vars into a param-env in the blanket-impl finder in rustdoc 😓

5b6ed253c4/src/librustdoc/clean/blanket_impl.rs (L43)

See the CI failure here: https://github.com/rust-lang/rust/actions/runs/4058194838/jobs/6984834619
This commit is contained in:
bors 2023-02-18 23:43:42 +00:00
commit f77f4d55bd
3 changed files with 23 additions and 7 deletions
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19
compiler/rustc_query_system/src/query/plumbing.rs
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@ -2,7 +2,7 @@
//! generate the actual methods on tcx which find and execute the provider,
//! manage the caches, and so forth.
use crate::dep_graph::{DepContext, DepKind, DepNode, DepNodeIndex};
use crate::dep_graph::{DepContext, DepKind, DepNode, DepNodeIndex, DepNodeParams};
use crate::ich::StableHashingContext;
use crate::query::caches::QueryCache;
use crate::query::job::{report_cycle, QueryInfo, QueryJob, QueryJobId, QueryJobInfo};
@ -408,10 +408,27 @@ where
// Fast path for when incr. comp. is off.
if !dep_graph.is_fully_enabled() {
// Fingerprint the key, just to assert that it doesn't
// have anything we don't consider hashable
if cfg!(debug_assertions) {
let _ = key.to_fingerprint(*qcx.dep_context());
}
let prof_timer = qcx.dep_context().profiler().query_provider();
let result = qcx.start_query(job_id, Q::DEPTH_LIMIT, None, || Q::compute(qcx, key));
let dep_node_index = dep_graph.next_virtual_depnode_index();
prof_timer.finish_with_query_invocation_id(dep_node_index.into());
// Similarly, fingerprint the result to assert that
// it doesn't have anything not considered hashable.
if cfg!(debug_assertions)
&& let Some(hash_result) = Q::HASH_RESULT
{
qcx.dep_context().with_stable_hashing_context(|mut hcx| {
hash_result(&mut hcx, &result);
});
}
return (result, dep_node_index);
}