Duplicate declaration

Reports duplicate declarations of classes, modules, interfaces, constants, global variables, type aliases, and methods.

Duplicate declarations produce DuplicatedDeclarationError.
Duplicate method definitions produce DuplicatedMethodDefinitionError.
Duplicate interface method definitions produce DuplicatedInterfaceMethodDefinitionError.

A quick fix is available to navigate to the duplicate declaration.

Example:

# Duplicate interface declaration
interface _Example
end

# Duplicate interface declaration
interface _Example
end

Locating this inspection

By ID

Can be used to locate inspection in e.g. Qodana configuration files, where you can quickly enable or disable it, or adjust its settings.

RbsDuplicateDeclarations

Via Settings dialog

Path to the inspection settings via IntelliJ Platform IDE Settings dialog, when you need to adjust inspection settings directly from your IDE.

Settings or Preferences | Editor | Inspections | RBS | Probable bugs

Inspection ID: RbsDuplicateDeclarations

Suppressing Inspection

You can suppress this inspection by placing the following comment marker before the code fragment where you no longer want messages from this inspection to appear:

//noinspection RbsDuplicateDeclarations

More detailed instructions as well as other ways and options that you have can be found in the product documentation:

RubyMine 2025.2

Inspection Details
By default bundled with:	Qodana for Ruby 2025.2, RubyMine 2025.2,

Last modified: 18 September 2025