Cannot remove unused variables declared by object destructuring with default value

[wjw99830]

Describe the bug

Cannot remove unused variables declared by object destructuring with default value.

However, it works without default value or declared by member accessing with nullish coalescing.

Input code

const { a, b = 'b' } = {};
const c = {}.c ?? 'c';

Config

{
  "minify": true,
  "jsc": {
    "target": "esnext",
    "minify": {
      "compress": {
        "module": true,
        "pure_getters": true
      },
      "mangle": false
    }
  }
}

Playground link (or link to the minimal reproduction)

https://play.swc.rs/?version=1.7.14&code=H4sIAAAAAAAAA0vOzysuUahWSNRRSFKwVVBPUleoBdLVtdZcyWCpZDBPL1nB3l5BPVndmgsAb%2BdTbTIAAAA%3D&config=H4sIAAAAAAAAA32VwXLjIAyG732KjM89dHrYQx9gb30GhoBwyBrwSCJNppN3X5nYadLIuXhsffwSSEL%2Bftlsuj257mPzLa%2FyMVokwOu3WOiU2R7F0oFLlhzGkbvXhe5pQsEOBM10vpCOLfbATUXvb%2B9vs6IbSiFYFLMtxRzD6TamK2lEILqxiVVc1gSZ6V4%2FMyxfE2Cst%2FZtKQPY%2FIQYSyZmhh5Qc%2BzKMNiRwBwsKl6mnVqMVLQQE6wM3oxYRpVnHzmWLDEfqQfrjSseFBQRHMcDaDKJJbJMcjzlPA172Na%2Bb3X%2BpYaDHaplJSYcW0lkt4rXXYnEJtSspfACV3JwgXNyfytjMAhcMT%2Fq9iXmlZr8A5AMDJYo2wSa37YiSD%2BtqcNTZcxBWpZPCpf%2B1k6ZoZekmhiDktkpM4ActWoi%2BOpgyqzTtjPjlfRR9GAgBOkVxTV9RXY7LSifRihBAVJfG7SuugBzvYUrfLoQT%2FBfOSXrDTavSJZ365ROaVuGJwES8K74JwukFFzWMcqUOI7rvGYP0hrg1SWVGngcAnIBuJihzcuH3pDrIR5NP5StOibGikKBGa53YYbn65RONvc%2F0%2BB%2BUKPMwFAw3c5fBOv4fvhizRzT5KOzlYsUIrpuCfSyPJvXLhVfW7j5pzL10%2BVX8Kf7WbRM%2FWuiukifi7Id4%2FwfhUyNrqAGAAA%3D

SWC Info output

Operating System:
    Platform: darwin
    Arch: arm64
    Machine Type: arm64
    Version: Darwin Kernel Version 22.6.0: Fri Sep 15 13:41:28 PDT 2023; root:xnu-8796.141.3.700.8~1/RELEASE_ARM64_T6000
    CPU: (10 cores)
        Models: Apple M1 Pro

Binaries:
    Node: 18.20.4
    npm: 10.7.0
    Yarn: 1.22.22
    pnpm: 7.33.7

Relevant Packages:
    @swc/core: 1.7.14
    @swc/helpers: 0.5.1
    @swc/types: N/A
    typescript: 5.4.5

SWC Config:
    output: N/A
    .swcrc path: N/A

Next.js info:
    output: N/A

Expected behavior

All code should be removed.

Actual behavior

b isn't removed.

Output code

const { b = 'b' } = {};

Version

1.7.14

Additional context

No response