"Introduce constant" refactoring breaks outside of functions

[etaloof]

Environment

• IntelliJ Rust plugin version: 0.3.128.3256-202-nightly
• Rust toolchain version: rustc 1.45.0 (5c1f21c3b 2020-07-13), stable-x86_64-pc-windows-msvc
• IDE name and version: Clion 2020.2 (202.6397.106)
• Operating system: Windows 10

Problem description

Applying the refactoring "Introduce constant"/"Introduce variable" to const slices length specifiers that are not located in a function yields a curious prompt. The options are (also shown in the screenshot):

• Replace this occurrence only
• Replace all 0 occurrences

This makes no sense, the options are contradictory. The number of occurrences for the length value is 0. It should be 2 for const BUFFER: [u8; 1000] = [0; 1000]; because 1000 appears twice in this line. The first option works fine and applying the second option does nothing.

Steps to reproduce

With the minimal example below:

• Move your cursor to a 1000 literal in one of the examples below the comment "these don't"
• Press Ctrl+Alt+V/Ctrl+Alt+C or right-click, Refactor, "Introduce constant" / "Introduce variable"

// these work as expected

fn main() {
    const BUFFER: [u8; 1000] = [0; 1000];
}

fn t() {
    const BUFFER: [u8; 1000] = [0; 1000];
}

// these don't

const BUFFER: [u8; 1000] = [0; 1000];

mod t {
    const BUFFER: [u8; 1000] = [0; 1000];
}

trait T {
    const BUFFER: [u8; 1000] = [0; 1000];
}