From 3a8932d9b0d12a67c9b92e0370de708a089d50b4 Mon Sep 17 00:00:00 2001 From: Wesley Wiser Date: Wed, 2 Oct 2019 05:58:26 -0400 Subject: [const-prop] Correctly handle locals that can't be propagated `const_prop()` now handles writing the Rvalue into the Place in the stack frame for us. So if we're not supported to propagate that value, we need to clear it. --- src/test/ui/consts/const-eval/issue-64970.rs | 15 +++++++++++++++ src/test/ui/consts/const-eval/issue-64970.stderr | 8 ++++++++ 2 files changed, 23 insertions(+) create mode 100644 src/test/ui/consts/const-eval/issue-64970.rs create mode 100644 src/test/ui/consts/const-eval/issue-64970.stderr (limited to 'src/test') diff --git a/src/test/ui/consts/const-eval/issue-64970.rs b/src/test/ui/consts/const-eval/issue-64970.rs new file mode 100644 index 00000000000..ede5081c8a5 --- /dev/null +++ b/src/test/ui/consts/const-eval/issue-64970.rs @@ -0,0 +1,15 @@ +// run-pass + +fn main() { + foo(10); +} + +fn foo(mut n: i32) { + if false { + n = 0i32; + } + + if n > 0i32 { + 1i32 / n; + } +} diff --git a/src/test/ui/consts/const-eval/issue-64970.stderr b/src/test/ui/consts/const-eval/issue-64970.stderr new file mode 100644 index 00000000000..2c44b68cbd1 --- /dev/null +++ b/src/test/ui/consts/const-eval/issue-64970.stderr @@ -0,0 +1,8 @@ +warning: unused arithmetic operation that must be used + --> $DIR/issue-64970.rs:13:9 + | +LL | 1i32 / n; + | ^^^^^^^^ + | + = note: `#[warn(unused_must_use)]` on by default + -- cgit 1.4.1-3-g733a5