Enum ChainError 

pub enum ChainError {
    LlmError(LlmError),
    MissingVariable(String),
    MemoryError(String),
    ToolError(ToolError),
    ParseError(String),
    Other(String),
}

Errors produced by a Chain during execution.

Variants

LlmError(LlmError)

The underlying LLM returned an error.

MissingVariable(String)

A required prompt variable was missing from the input map.

MemoryError(String)

The chain’s memory layer failed.

ToolError(ToolError)

A tool invoked by an agent returned an error.

ParseError(String)

Output could not be parsed into the expected type.

Other(String)

Any error not covered by the variants above.

Trait Implementations

impl Debug for ChainError

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for ChainError

fn fmt(&self, __formatter: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Error for ChainError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl From<LlmError> for ChainError

fn from(source: LlmError) -> Self

Converts to this type from the input type.

impl From<ToolError> for ChainError

fn from(source: ToolError) -> Self

Converts to this type from the input type.