Interactive Tutoring Chat
Detected:
C++
Student
Fix this memory leak in my C++ pointer loop and explain why it happens.
Google DeepMind 3.8 Tutor
Live Reasoning
Resolved
Extended Thinking Trace (4 steps) ▼ Expand / Collapse
Step 1:
Parse C++ AST for dynamically allocated array
new int[500] assigned to raw pointer ptr.
Step 2:
Cross-reference visual frame
gdb_memory_snapshot_042.png confirming allocated heap range [0x100 - 0x8D0] remains unfreed at exit.
Step 3:
Coordinate concurrent background inspection with Valgrind Log Inspector to evaluate leak severity without blocking conversation response generation.
Step 4:
Synthesize fix: replace omission with explicit array deallocation
delete[] ptr; and nullify pointer to prevent dangling dereferences.
In C++, allocating with
new[] allocates memory directly on the process heap that is not reclaimed automatically when the pointer goes out of scope. Without matching deallocation, this memory remains trapped until process termination.
Suggested Correction:
- // Forgot cleanup before exit
+ delete[] ptr; ptr = nullptr;
Best practice: Prefer modern RAII primitives like
std::vector<int> or std::unique_ptr<int[]> to manage lifetime deterministically.