slither-mutate: (AOR) Fix for dynamic array operations

[smonicas]

Fix a crash with dynamic arrays. Due to how .push and .pop operations are converted to the IR a binary operations is present even if it's not in the code, this causes a crash when trying to replace it. The fix skip the .pop operation entirely and last 6 IR operations which are generated when converting to the IR for a .push.

Summary by CodeRabbit

• Bug Fixes
  • Improved handling of dynamic array operations like .push and .pop to prevent incorrect mutations.
  • Enhanced mutation logic to skip specific internal operations based on the type of operation, leading to more accurate mutations.

[coderabbitai[bot]]

Walkthrough

The AOR.py file in the slither/tools/mutator/mutators directory has been updated to include various core expressions and types imports. Additionally, the _mutate method received significant changes to handle specific cases such as dynamic array operations (e.g., .push and .pop) more effectively, and it now skips certain intermediate representation operations based on the type of operation being performed.

Changes

Files / File Group	Summary of Changes
AOR.py	Added imports for Variable, CallExpression, MemberAccess, Identifier, and ArrayType. Modified _mutate method to handle dynamic array operations and skip certain IR operations based on the operation type

Sequence Diagram(s)

sequenceDiagram
    participant Developer
    participant AORMutator
    participant MutatorHelper

    Developer->>AORMutator: Initiate mutation process
    AORMutator->>MutatorHelper: Import core expressions/types
    Note over AORMutator, Developer: Additional imports like Variable, CallExpression, etc.
  
    AORMutator->>AORMutator: Check for dynamic array operations (.push, .pop)
    alt Dynamic array operation found
        AORMutator-->>AORMutator: Skip specific IR operations
    end
  
    AORMutator->>Developer: Return mutated code

This diagram showcases the high-level interactions between the developer initiating the mutation process and the AORMutator, with key operations highlighted such as handling dynamic array operations and adjusting IR operations accordingly.

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