Prep Room
Sign inCreate account
Code Room
Vibe codingMediumvc-g351
Subject Ai code reviewLevel Mid–Senior~16 minCommon in Distributed systems interviewsIndustries Software development, Telecom

Question

An AI wrote this Python loop to consume a length-delimited stream over a socket. When the peer closes the connection mid-stream, the client busy-loops at 100% CPU. Find the bug, the trigger, and the fix.

python
def consume(sock):    while True:        header = sock.recv(4)        msg_len = int.from_bytes(header, "big")        body = b""        while len(body) < msg_len:            body += sock.recv(msg_len - len(body))        dispatch(body)
What a strong answer looks like

Treat the AI’s output as a draft to verify, not an answer to trust. Name the specific flaw and the input that triggers it, say how you’d catch it — tests, edge cases, reading critically — and how you’d re-prompt or decompose to get it right.

Learn the concepts
Describe your solution

Vibe coding: describe the solution in plain language (or narrate it) and the coach grades your approach. Generating runnable code from your description is coming next.

Run or narrate your approach, then ask the coach.