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The const propagator cannot trace references.

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Thus we avoid propagation of a local the moment we encounter references to it.
This commit is contained in:
Oliver Scherer 2020-06-22 14:03:18 +02:00
parent 1a4e2b6f9c
commit 5fa8b08808
8 changed files with 204 additions and 56 deletions
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2
src/test/ui/mir/mir_detects_invalid_ops.rs
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@ -19,6 +19,6 @@ fn mod_by_zero() {
fn oob_error_for_slices() {
let a: *const [_] = &[1, 2, 3];
unsafe {
let _b = (*a)[3]; //~ ERROR this operation will panic at runtime [unconditional_panic]
let _b = (*a)[3];
}
}

8
src/test/ui/mir/mir_detects_invalid_ops.stderr
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@ -12,11 +12,5 @@ error: this operation will panic at runtime
LL | let _z = 1 % y;
| ^^^^^ attempt to calculate the remainder with a divisor of zero
error: this operation will panic at runtime
--> $DIR/mir_detects_invalid_ops.rs:22:18
|
LL | let _b = (*a)[3];
| ^^^^^^^ index out of bounds: the len is 3 but the index is 3
error: aborting due to 3 previous errors
error: aborting due to 2 previous errors