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add logging to fudge_inference_if_ok #148468

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Nov 4, 2025
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add logging to fudge_inference_if_ok #148468

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4 changes: 3 additions & 1 deletion compiler/rustc_infer/src/infer/snapshot/fudge.rs
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Original file line number Diff line number Diff line change
@@ -1,3 +1,4 @@
use std::fmt::Debug;
use std::ops::Range;

use rustc_data_structures::{snapshot_vec as sv, unify as ut};
Expand Down Expand Up @@ -84,11 +85,12 @@ impl<'tcx> InferCtxt<'tcx> {
/// the actual types (`?T`, `Option<?T>`) -- and remember that
/// after the snapshot is popped, the variable `?T` is no longer
/// unified.
#[instrument(skip(self, f), level = "debug")]
#[instrument(skip(self, f), level = "debug", ret)]
pub fn fudge_inference_if_ok<T, E, F>(&self, f: F) -> Result<T, E>
where
F: FnOnce() -> Result<T, E>,
T: TypeFoldable<TyCtxt<'tcx>>,
E: Debug,
{
let variable_lengths = self.variable_lengths();
let (snapshot_vars, value) = self.probe(|_| {
Expand Down
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