avoid-assigning-to-static-field
Warns when an instance method assigns to a static field.
An assignment to a static field from a regular method can either indicate a mutable global state that is shared between multiple instances (which in itself can lead to tricky bugs where one instance modifies the behavior of all other instances), or a field that is inadvertently marked as static. Consider refactoring the code or marking the method static.
Example
❌ Bad:
class Some {
static int value = 1;
void work() {
value = 2; // LINT: Avoid assigning to static fields from non-static methods.
}
}
✅ Good:
class Some {
static int value = 1;
static void work() {
value = 2; // Correct, the method is also static
}
}