Greptile Summary

This PR fixes issue #6165 by dynamically reporting the configured backend_host in terminal logs instead of the hardcoded 0.0.0.0. The intent is correct, but the implementation introduces a critical runtime bug: after calling config = get_config() (which returns a Config instance), the code then invokes config() with parentheses as though config were still a function. This will raise TypeError: 'Config' object is not callable every time notify_backend() is called, making the backend startup notification completely broken.

Key issues:

• Critical bug: config().backend_host and config().backend_port should be config.backend_host and config.backend_port — attributes accessed on the already-resolved Config object, not a second function call.
• The fix is a one-character change per reference (removing the () after config), and once corrected the PR achieves its stated goal correctly.

Confidence Score: 1/5

• Not safe to merge — the change introduces a critical TypeError that will crash the backend startup notification on every run.
• The PR's goal is valid and the approach is sensible, but a subtle double-invocation bug (config() instead of config) means notify_backend() will always raise TypeError: 'Config' object is not callable. This is a regression that breaks existing working behaviour and must be corrected before merging.
• reflex/utils/exec.py lines 162–165 — the config() calls must be changed to config. attribute accesses.

Important Files Changed

Sequence Diagram

sequenceDiagram
    participant Runner as App Runner
    participant Exec as exec.notify_backend()
    participant Config as get_config()

    Runner->>Exec: notify_backend()
    Exec->>Config: get_config()
    Config-->>Exec: Config object (config)
    Note over Exec: BUG: config() called<br/>with parentheses — TypeError!
    Exec->>Exec: config().backend_host ❌
    Exec->>Exec: config().backend_port ❌
    Note over Exec: CORRECT: access attributes directly
    Exec->>Exec: config.backend_host ✅
    Exec->>Exec: config.backend_port ✅
    Exec-->>Runner: console.print("Backend running at: http://{host}:{port}")

_{Last reviewed commit: "Fix #6165"}