Null Dereference

Reports dereferences of the pointers that may contain nullptr.

Example:

  using namespace std;
  void process(string *a, string b) {
    if (a != nullptr || a->length()) {
      a = &b;
    }
  }

Locating this inspection

By ID

Can be used to locate inspection in e.g. Qodana configuration files, where you can quickly enable or disable it, or adjust its settings.

NullDereference

Via Settings dialog

Path to the inspection settings via IntelliJ Platform IDE Settings dialog, when you need to adjust inspection settings directly from your IDE.

Settings or Preferences | Editor | Inspections | C/C++ | Data Flow Analysis

Inspection ID: NullDereference

Suppressing Inspection

You can suppress this inspection by placing the following comment marker before the code fragment where you no longer want messages from this inspection to appear:

//noinspection NullDereference

More detailed instructions as well as other ways and options that you have can be found in the product documentation:

CLion 2025.2

Inspection Details
By default bundled with:	CLion 2025.2,
Can be installed with plugin:	CLion, 2025.2

Last modified: 18 September 2025