Windows Build Tests Failures On Qt 6.8 LTS MinGW

by Alex Johnson 49 views

Oh no! It looks like our Windows Build Tests using Qt 6.8 LTS with MinGW on the refs/heads/master branch have encountered some issues. This means that the latest changes in our main development line (master) didn't pass the automated checks when built on a Windows environment with a specific Qt version and compiler. We've encountered a few specific test failures, which we'll dive into.

This isn't the end of the world, but it's definitely something we need to investigate and fix to ensure the stability and quality of our project. Think of these tests as a crucial quality gatekeeper, catching potential problems before they reach our users.

Understanding the Failures

When a build or test fails, it's like a little red flag waving, telling us something isn't quite right. In this case, the failure occurred during the Windows Build Tests (Qt 6.8 LTS MinGW) workflow. This workflow is designed to compile and run tests on Windows using a specific, stable version of Qt (version 6.8, which is an LTS or Long-Term Support release) and the MinGW compiler. LTS versions are generally preferred for stability and extended support, making this a critical test environment.

The commit that triggered these failures is 1f8bf41bf782c9ba140e129602273d2129a0cf37. This commit represents the exact point in our codebase where the problems were detected. The goal now is to pinpoint what in this commit, or in conjunction with the existing code, caused these tests to falter. Our team, specifically viperx1 and Usagi-dono, are on the case to figure this out.

Configure Log Insights

The Configure log gives us a peek into how the project was set up before the build and test phases began. We can see a lot of lines starting with -- Skipping AUTOMOC. AUTOMOC is a tool within Qt's build system (Meta-Object Compiler) that processes special C++ classes with Qt's meta-object system. It generates extra C++ code needed for features like signals and slots, properties, and dynamic casting.

  • What does skipping AUTOMOC mean? It usually indicates that CMake, our build system generator, has determined that the specific source files listed don't require AUTOMOC processing. This might be because they don't contain any Q_OBJECT macros or other constructs that necessitate meta-object code generation. While it might seem like a warning, in many cases, it's perfectly normal behavior and not the cause of the failure. However, if AUTOMOC should have run on a file and was skipped, it could lead to build errors or runtime issues later on.
  • Unused Variables: We also see a CMake Warning: Manually-specified variables were not used by the project: CMAKE_C_COMPILER. This means that a variable related to the C compiler was set, but the build process didn't end up using it. This could happen if the project primarily uses C++ and the C compiler wasn't needed, or if there was a configuration mismatch. While typically not a direct cause of test failures, it’s good practice to have clean configurations without unused variables.
  • Configuration Success: Despite the skipped AUTOMOC lines and the unused variable warning, the configuration itself seems to have completed successfully: -- Configuring done (4.7s) and -- Generating done (0.8s). This tells us that CMake was able to process the project's build scripts and generate the necessary build files (like Makefiles or Visual Studio project files) for the MinGW environment.

The build files were correctly written to D:/a/Usagi-dono/Usagi-dono/build, indicating the generation step worked as expected. The main takeaway from the configure log is that the setup phase completed, but we need to keep an eye on any unusual skipping patterns or warnings that might hint at deeper issues.

Deep Dive into Build and Test Failures

The Build log shows the compilation process for various parts of the project. We see numerous lines like [XXX/YYY] Building CXX object .... This means the C++ compiler is working through each source file, turning them into object files that will eventually be linked together to form executables and libraries. The numbering [XXX/YYY] indicates the progress, showing that out of YYY total compilation steps, XXX have been completed. The build process appears to have reached a high percentage of completion (up to [721/721]), successfully linking many executables, including the main usagi executable and numerous test executables.

However, the real meat of the problem lies in the Test log. This is where the executed tests are reported, and we see a mix of Passed and Failed statuses. Let's break down the failures:

  • 33 - test_hasher_threadpool (Failed): This test focuses on the functionality of the HasherThreadPool. This component likely manages multiple threads to speed up file hashing operations. A failure here could indicate issues with thread management, synchronization, or how tasks are distributed and completed within the pool.
  • 34 - test_stop_non_blocking (Failed): This test seems to be related to gracefully stopping an operation without blocking the main thread. Failures could suggest race conditions, improper cleanup, or that the stopping mechanism isn't behaving as expected, potentially leaving resources in an inconsistent state or causing deadlocks.
  • 51 - test_chain_filtering_standalone (Failed): This test targets the chain_filtering_standalone functionality. It's likely testing how the system filters or processes chains of related data independently. A failure might point to errors in the filtering logic, data structure manipulation, or how the chain's elements interact.
  • 56 - test_hasher_card_update_signal (SEGFAULT): This is a critical failure. A Segmentation Fault (SegFault) means the program tried to access a memory location it wasn't allowed to access. This is often caused by dereferencing a null pointer, accessing memory after it has been freed, buffer overflows, or other low-level memory corruption issues. The fact that it happened during test_hasher_card_update_signal suggests a problem related to how hashing results or associated