Summary of the Strava Connect Test Application

This test application demonstrates a crash in Qt's OAuth implementation when connecting to Strava. The root issue occurs in the setModifyParametersFunction callback, where a pointer to a parameter map is provided but becomes inaccessible in a deterministic manner.

The Core Problem

The crash specifically happens because:

1. When setting up the OAuth flow, we provide a lambda function via setModifyParametersFunction that receives a QMultiMap<QString, QVariant> *parameters pointer.

1. During the OAuth authorization process, this lambda is called with what appears to be a valid parameters pointer (non-null), but attempting to access or modify its contents causes a crash.

1. This failure occurs consistently (deterministically) when working with Strava's OAuth implementation, suggesting either:

• • A timing/threading issue in Qt's OAuth implementation
  • A conflict with Strava's specific OAuth requirements
  • Memory management problems when processing OAuth parameters

Key Components

The application isolates this issue by implementing a minimal reproduction case focusing solely on the Strava authentication process:

• A standalone implementation of strava_connect() that creates the OAuth flow
• The exact parameter modification function that causes the crash
• A complete OAuth callback handling setup

This minimal test case allows the Qt team to observe and debug the exact conditions under which the pointer becomes inaccessible, leading to the crash.