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Skip dead code checks on items that failed typeck

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This commit is contained in:
Oli Scherer 2024-01-16 10:03:29 +00:00
parent 9a8f117d7b
commit 3599c18874
3 changed files with 16 additions and 5 deletions
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5
compiler/rustc_passes/src/dead.rs
View File

@ -128,7 +128,10 @@ fn lookup_and_handle_method(&mut self, id: hir::HirId) {
if let Some(def_id) = self.typeck_results().type_dependent_def_id(id) { if let Some(def_id) = self.typeck_results().type_dependent_def_id(id) {
self.check_def_id(def_id); self.check_def_id(def_id);
} else { } else {
bug!("no type-dependent def for method"); assert!(
self.typeck_results().tainted_by_errors.is_some(),
"no type-dependent def for method"
);
} }
} }

10
tests/ui/consts/const-eval/infinite_loop.rs
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@ -1,7 +1,13 @@
//! This test tests two things at once:
//! 1. we error if a const evaluation hits the deny-by-default lint limit
//! 2. we do not ICE on invalid follow-up code
// compile-flags: -Z tiny-const-eval-limit
fn main() { fn main() {
// Tests the Collatz conjecture with an incorrect base case (0 instead of 1). // Tests the Collatz conjecture with an incorrect base case (0 instead of 1).
// The value of `n` will loop indefinitely (4 - 2 - 1 - 4). // The value of `n` will loop indefinitely (4 - 2 - 1 - 4).
let _ = [(); { let s = [(); {
let mut n = 113383; // #20 in https://oeis.org/A006884 let mut n = 113383; // #20 in https://oeis.org/A006884
while n != 0 { while n != 0 {
//~^ ERROR is taking a long time //~^ ERROR is taking a long time
@ -9,4 +15,6 @@ fn main() {
} }
n n
}]; }];
s.nonexistent_method();
} }

6
tests/ui/consts/const-eval/infinite_loop.stderr
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@ -1,5 +1,5 @@
error: constant evaluation is taking a long time error: constant evaluation is taking a long time
--> $DIR/infinite_loop.rs:6:9 --> $DIR/infinite_loop.rs:12:9
| |
LL | / while n != 0 { LL | / while n != 0 {
LL | | LL | |
@ -10,9 +10,9 @@ LL | | }
= note: this lint makes sure the compiler doesn't get stuck due to infinite loops in const eval. = note: this lint makes sure the compiler doesn't get stuck due to infinite loops in const eval.
If your compilation actually takes a long time, you can safely allow the lint. If your compilation actually takes a long time, you can safely allow the lint.
help: the constant being evaluated help: the constant being evaluated
--> $DIR/infinite_loop.rs:4:18 --> $DIR/infinite_loop.rs:10:18
| |
LL | let _ = [(); { LL | let s = [(); {
| __________________^ | __________________^
LL | | let mut n = 113383; // #20 in https://oeis.org/A006884 LL | | let mut n = 113383; // #20 in https://oeis.org/A006884
LL | | while n != 0 { LL | | while n != 0 {