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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-17 12:02:58 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-17 12:02:58 +0000
commit698f8c2f01ea549d77d7dc3338a12e04c11057b9 (patch)
tree173a775858bd501c378080a10dca74132f05bc50 /src/test/ui/cleanup-rvalue-scopes-cf.rs
parentInitial commit. (diff)
downloadrustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.tar.xz
rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.zip
Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/test/ui/cleanup-rvalue-scopes-cf.rs')
-rw-r--r--src/test/ui/cleanup-rvalue-scopes-cf.rs35
1 files changed, 35 insertions, 0 deletions
diff --git a/src/test/ui/cleanup-rvalue-scopes-cf.rs b/src/test/ui/cleanup-rvalue-scopes-cf.rs
new file mode 100644
index 000000000..e3cecb1bf
--- /dev/null
+++ b/src/test/ui/cleanup-rvalue-scopes-cf.rs
@@ -0,0 +1,35 @@
+// Test that the borrow checker prevents pointers to temporaries
+// with statement lifetimes from escaping.
+
+use std::ops::Drop;
+
+static mut FLAGS: u64 = 0;
+
+struct StackBox<T> { f: T }
+struct AddFlags { bits: u64 }
+
+fn AddFlags(bits: u64) -> AddFlags {
+ AddFlags { bits: bits }
+}
+
+fn arg(x: &AddFlags) -> &AddFlags {
+ x
+}
+
+impl AddFlags {
+ fn get(&self) -> &AddFlags {
+ self
+ }
+}
+
+pub fn main() {
+ let x1 = arg(&AddFlags(1)); //~ ERROR temporary value dropped while borrowed
+ let x2 = AddFlags(1).get(); //~ ERROR temporary value dropped while borrowed
+ let x3 = &*arg(&AddFlags(1)); //~ ERROR temporary value dropped while borrowed
+ let ref x4 = *arg(&AddFlags(1)); //~ ERROR temporary value dropped while borrowed
+ let &ref x5 = arg(&AddFlags(1)); //~ ERROR temporary value dropped while borrowed
+ let x6 = AddFlags(1).get(); //~ ERROR temporary value dropped while borrowed
+ let StackBox { f: x7 } = StackBox { f: AddFlags(1).get() };
+ //~^ ERROR temporary value dropped while borrowed
+ (x1, x2, x3, x4, x5, x6, x7);
+}