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-rw-r--r--tests/ui/lint/lint-temporary-cstring-as-ptr.stderr19
1 files changed, 17 insertions, 2 deletions
diff --git a/tests/ui/lint/lint-temporary-cstring-as-ptr.stderr b/tests/ui/lint/lint-temporary-cstring-as-ptr.stderr
index 79ef57dd1..4e5c8aa06 100644
--- a/tests/ui/lint/lint-temporary-cstring-as-ptr.stderr
+++ b/tests/ui/lint/lint-temporary-cstring-as-ptr.stderr
@@ -1,5 +1,5 @@
error: getting the inner pointer of a temporary `CString`
- --> $DIR/lint-temporary-cstring-as-ptr.rs:7:48
+ --> $DIR/lint-temporary-cstring-as-ptr.rs:14:48
|
LL | let s = CString::new("some text").unwrap().as_ptr();
| ---------------------------------- ^^^^^^ this pointer will be invalid
@@ -14,5 +14,20 @@ note: the lint level is defined here
LL | #![deny(temporary_cstring_as_ptr)]
| ^^^^^^^^^^^^^^^^^^^^^^^^
-error: aborting due to previous error
+error: getting the inner pointer of a temporary `CString`
+ --> $DIR/lint-temporary-cstring-as-ptr.rs:8:52
+ |
+LL | let s = CString::new("some text").unwrap().as_ptr();
+ | ---------------------------------- ^^^^^^ this pointer will be invalid
+ | |
+ | this `CString` is deallocated at the end of the statement, bind it to a variable to extend its lifetime
+...
+LL | mymacro!();
+ | ---------- in this macro invocation
+ |
+ = note: pointers do not have a lifetime; when calling `as_ptr` the `CString` will be deallocated at the end of the statement because nothing is referencing it as far as the type system is concerned
+ = help: for more information, see https://doc.rust-lang.org/reference/destructors.html
+ = note: this error originates in the macro `mymacro` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+error: aborting due to 2 previous errors