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Diffstat (limited to 'compiler/rustc_error_codes/src/error_codes/E0729.md')
| -rw-r--r-- | compiler/rustc_error_codes/src/error_codes/E0729.md | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/compiler/rustc_error_codes/src/error_codes/E0729.md b/compiler/rustc_error_codes/src/error_codes/E0729.md new file mode 100644 index 000000000..74f89080b --- /dev/null +++ b/compiler/rustc_error_codes/src/error_codes/E0729.md @@ -0,0 +1,30 @@ +Support for Non-Lexical Lifetimes (NLL) has been included in the Rust compiler +since 1.31, and has been enabled on the 2015 edition since 1.36. The new borrow +checker for NLL uncovered some bugs in the old borrow checker, which in some +cases allowed unsound code to compile, resulting in memory safety issues. + +### What do I do? + +Change your code so the warning does no longer trigger. For backwards +compatibility, this unsound code may still compile (with a warning) right now. +However, at some point in the future, the compiler will no longer accept this +code and will throw a hard error. + +### Shouldn't you fix the old borrow checker? + +The old borrow checker has known soundness issues that are basically impossible +to fix. The new NLL-based borrow checker is the fix. + +### Can I turn these warnings into errors by denying a lint? + +No. + +### When are these warnings going to turn into errors? + +No formal timeline for turning the warnings into errors has been set. See +[GitHub issue 58781](https://github.com/rust-lang/rust/issues/58781) for more +information. + +### Why do I get this message with code that doesn't involve borrowing? + +There are some known bugs that trigger this message. |