rust lifetime_error ai_generated true

error[E0597]: borrowed value does not live long enough

ID: rust/e0597-borrowed-too-short

Also available as: JSON · Markdown
85%Fix Rate
90%Confidence
50Evidence
2023-01-01First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
1 active — — —

Root Cause

Reference outlives the value it borrows. Value is dropped while still being referenced.

generic

Workarounds

  1. 92% success Restructure code so the owner lives longer than the reference 
    // Move let binding before the reference user
let data = String::from("hello");
let reference = &data;  // data lives longer

    Sources: https://doc.rust-lang.org/book/ch10-03-lifetime-syntax.html

  2. 85% success Clone the data to give the consumer its own copy 
    let owned_data = borrowed_data.to_owned(); // or .clone()
// owned_data lives as long as you need

// For strings:
let s: String = some_str_ref.to_string();
// s is owned and won't be dropped when the source goes out of scope

    Sources: https://doc.rust-lang.org/std/clone/trait.Clone.html

  3. 82% success Use Rc/Arc for shared ownership when multiple parts need the data 
    Use Rc/Arc for shared ownership when multiple parts need the data

    Sources: https://doc.rust-lang.org/std/rc/struct.Rc.html

Dead Ends

Common approaches that don't work:

  1. Use 'static lifetime to extend 80% fail

    'static means lives forever — wrong for most temporary values

  2. Leak memory with Box::leak 90% fail

    Creates a genuine memory leak — never do this for normal code

Error Chain

Frequently confused with: