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---
title: "Self in Block"
description: "An Objective-C-specific analysis to detect when a block captures `self`."
---
An Objective-C-specific analysis to detect when a block captures `self`.
Activate with `--self-in-block`.
Supported languages:
- C/C++/ObjC: Yes
- Java: No
## List of Issue Types
The following issue types are reported by this checker:
- [CAPTURED_STRONG_SELF](/docs/1.0.0/all-issue-types#captured_strong_self)
- [MIXED_SELF_WEAKSELF](/docs/1.0.0/all-issue-types#mixed_self_weakself)
- [MULTIPLE_WEAKSELF](/docs/1.0.0/all-issue-types#multiple_weakself)
- [STRONG_SELF_NOT_CHECKED](/docs/1.0.0/all-issue-types#strong_self_not_checked)
- [WEAK_SELF_IN_NO_ESCAPE_BLOCK](/docs/1.0.0/all-issue-types#weak_self_in_no_escape_block)