Skip to content

Bug: Dev Tools: TypeError: Cannot read property 'memoizedState' of null #18514

Closed
@bradzacher

Description

@bradzacher

React version:

Steps To Reproduce

Repro steps using confidential internal fb tool provided separately (https://fb.workplace.com/groups/2299331103613797/permalink/2605716262975278/)

Gist of the repro:

  1. open app
  2. open react dev tools to profiling tab
  3. turn on "Record why each component rendered while profiling"
  4. interact with app
  5. following error occurs: "TypeError: Cannot read property 'memoizedState' of null"
  6. inspecting the flamegraph now shows incomplete information

Based on the stack trace, it looks like the issue occurs specifically on this line:

Metadata

Metadata

Assignees

Type

No type

Projects

No projects

Milestone

No milestone

Relationships

None yet

Development

No branches or pull requests

Issue actions