---
name: "Devel::MAT::Tool::ListDanglingPtrs"
section: "3pm"
platform: "linux"
package: "libdevel-mat-perl"
version: "0.53-1+b1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/Devel::MAT::Tool::ListDanglingPtrs"
---

# Devel::MAT::Tool::ListDanglingPtrs(3pm)

display a list of SV pointer fields that do not point at known SVs

## NAME

"Devel::MAT::Tool::ListDanglingPtrs" - display a list of SV pointer fields that do not point at known SVs

## DESCRIPTION

This `"Devel::MAT"` tool displays a list of fields from known SVs containing non-NULL addresses, but which do not point to other known SVs. These are so-called "dangling pointers".

## COMMANDS

### list-dangling-ptrs

```
   pmat> list-dangling-ptrs
   CODE(proto) at 0x55b9d83ae3d8 has no constval SV at addr 0x55b9d83963f0
   ...
```

Prints a list of fields in SVs which do not point at other valid SVs.

## AUTHOR

Paul Evans \<leonerd@leonerd.org.uk\>