zed-industries/zed · error

unexpected non-command action in inlay hint label part

Error message

unexpected non-command action in inlay hint label part

What it means

A validation guard in the LSP inlay-hint label part mapper: while converting protocol label parts into GPUI elements, a part arrived with a `command` field whose serialized action did not decode into any known Zed action. The `Some(command)` arm tries to resolve the command to an Action and this sentinel error rejects the unexpected/non-command payload instead of silently dropping it. The input at fault is the command payload inside a single label part sent by the language server.

Source

Thrown at crates/project/src/lsp_command.rs:4184

                                                    range.end.row,
                                                    range.end.column,
                                                )),
                                            ),
                                        },
                                    )),
                                    None => None,
                                }
                            },
                            command: match part.command {
                                Some(command) => {
                                    let action = LspStore::deserialize_code_action(command)
                                        .context("invalid command in inlay hint label part")?;
                                    match action.lsp_action {
                                        LspAction::Command(command) => {
                                            Some((action.server_id, command))
                                        }
                                        LspAction::Action(_) | LspAction::CodeLens(_) => {
                                            anyhow::bail!(
                                                "unexpected non-command action in inlay hint label part"
                                            )
                                        }
                                    }
                                }
                                None => None,
                            },
                        });
                    }

                    InlayHintLabel::LabelParts(label_parts)
                }
            },
            padding_left: message_hint.padding_left,
            padding_right: message_hint.padding_right,
            kind: message_hint
                .kind
                .as_deref()

View on GitHub (pinned to 9d272b0363)

Solutions

1. Treat the unresolvable command as a no-op and render the label part without the action, downgrading this error to a logged warning
2. Update the action deserialization table so the command name/method sent by the server maps to a known Action
3. Report the offending language server and command payload upstream so the mapping can be added

When it happens

Trigger: Thrown at crates/project/src/lsp_command.rs:4184 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of zed-industries/zed@9d272b0363 (2026-09-12). Data as JSON: /api/errors/43a34ac88c7851de. Report an issue: GitHub.