Common Errors in Rust and How to Fix Them

This series of articles helps you get through common errors, warnings, and other issues those you might encounter when working with the Rust programming language.

Common Errors in Rust and How to Fix Them

1 E0382 in Rust: Use of Moved Value Error

2 E0495 in Rust: Lifetime Conflict for Captured Variables in a Closure

3 E0277 in Rust: Trait Bound Not Satisfied for the Given Type

4 E0106 in Rust: Missing Lifetime Specifier Error

5 E0599 in Rust: No Method Found Matching the Receiver’s Type

6 E0369 in Rust: No Implementation for an Operator on Certain Types

7 E0308 in Rust: Mismatched Types Between Expected and Found Values

8 E0502 in Rust: Cannot Borrow as Mutable Because It Is Also Borrowed as Immutable

9 E0716 in Rust: Temporary Value Dropped While Borrowed

10 E0425 in Rust: Undeclared Identifier or Unresolved Name

11 E0303 in Rust: Pattern Does Not Mention All Fields When Destructuring

12 E0529 in Rust: Expected Expression, Found Statement or Inconsistent Syntax

13 E0700 in Rust: Incorrect `async fn` Return Type Causing Lifetime Issues

14 E0282 in Rust: Type Annotations Needed for Default Type Parameters

15 E0381 in Rust: Variable Used Before Being Initialized

16 E0463 in Rust: Cannot Find Crate for a Required Dependency

17 E0562 in Rust: Pattern Matching Issue with Multiple Possible Interpretations

18 E0261 in Rust: Unknown Parameter Name in Function Definition

19 E0464 in Rust: Multiple Crates Link to the Same Library Name

20 E0560 in Rust: Struct Has No Field with the Given Name

21 E0567 in Rust: Auto Trait Implementation Error With PhantomData

22 E0015 in Rust: Calls in Constants Are Limited to Constant Functions

23 E0152 in Rust: Duplicate Definition of an Enum Variant

24 E0557 in Rust: Feature Has Been Removed or Is Unavailable in the Stable Channel

25 E0373 in Rust: Closure May Outlive the Current Function Due to Borrowed References

26 E0004 in Rust: Non-exhaustive pattern matching leads to a missing arm error

27 E0005 in Rust: Refutable pattern in a function argument or let binding

28 E0007 in Rust: Constant function call not allowed in this context

29 E0010 in Rust: Invalid use of a language item within a constant expression

30 E0013 in Rust: Constants cannot contain mutable references

31 E0020 in Rust: Pattern in function must have a type known at compile time

32 E0023 in Rust: Pattern with incorrect arity or structure for the matched type

33 E0027 in Rust: Pattern match on a type that does not support destructuring

34 E0029 in Rust: Only char and numeric types can be cast using `as`

35 E0030 in Rust: Overloaded operators must have a specified trait signature

36 E0034 in Rust: Multiple applicable items in scope for the same method name

37 E0038 in Rust: Trait cannot be made into an object due to unsized or static requirement

38 E0040 in Rust: Explicit `self` type in trait method not allowed for static dispatch

39 E0044 in Rust: Foreign items may not have type parameters

40 E0045 in Rust: Variadic function found: not supported on all Rust platforms

41 E0046 in Rust: Trait requires an associated function but no default implementation provided

42 E0049 in Rust: Flexible array size not supported in this context

43 E0050 in Rust: Method has incorrect type signature for trait implementation

44 E0053 in Rust: Method return type does not match trait definition

45 E0054 in Rust: Match arm has incompatible type with the original expression

46 E0055 in Rust: Cannot move out of a borrowed content in a match guard

47 E0057 in Rust: Incorrect number of function parameters supplied

48 E0061 in Rust: This function takes a certain number of arguments but fewer were provided

49 E0062 in Rust: Field count mismatch when destructuring a struct

50 E0063 in Rust: Missing fields in struct initializer

51 E0070 in Rust: Invalid left-hand side expression for an assignment

52 E0071 in Rust: Expected `struct`, `enum`, or `union` but found something else

53 E0075 in Rust: Variadic function calls are only supported for C-variadic functions

54 E0079 in Rust: Enum variant discriminant is not an integer

55 E0081 in Rust: Discriminant value already used by another variant

56 E0084 in Rust: Enum variant requires a literal discriminant value

57 E0087 in Rust: Too many lifetimes provided for a type alias or function

58 E0088 in Rust: Using types with infinite size is disallowed (recursive types without indirection)

59 E0090 in Rust: Box type is not permitted in certain constant expressions

60 E0091 in Rust: Type parameter appears with multiple different lifetimes

61 E0117 in Rust: No base type found for an inherent implementation

62 E0120 in Rust: The Drop trait can only be implemented on the same crate’s type

63 E0121 in Rust: The type placeholder `_` is not allowed within traits or impls

64 E0124 in Rust: Field is already declared in this struct or variant

65 E0131 in Rust: Non-exhaustive patterns when matching a type with `#[non_exhaustive]`

66 E0132 in Rust: Partial initializations of uninitialized structures are not allowed

67 E0133 in Rust: Dereference of raw pointer in constant expression is not allowed

68 E0137 in Rust: Multiple `main` functions found in the same crate

69 E0139 in Rust: Unused must_use attribute on a function or type

70 E0158 in Rust: Internal compiler error triggered by unimplemented corner case

71 E0161 in Rust: Cannot move out of borrowed content in function parameter

72 E0178 in Rust: Conflicting implementations of the same trait for a type

73 E0182 in Rust: Function declared `const fn` but an unstable feature was used

74 E0185 in Rust: Method is declared `const` but references a mutable static

75 E0186 in Rust: Method is declared `const` but performs an operation not allowed in `const fn`

76 E0195 in Rust: Cannot determine type for the closure expression

77 E0199 in Rust: Implementing a trait is not allowed for a type defined in another crate if the trait is foreign

78 E0200 in Rust: Trait requires the Self type to be `Sized`, but it is not

79 E0201 in Rust: Missing trait bound for an associated type