This is a detailed account of the investigation into GCC build failures on Debian systems by Jochen Sprickerhof, Helmut Grohne, and another contributor. The process involved pinpointing discrepancies between system configurations and examining signals generated during the build process. Through extensive testing and debugging, the team identified a critical flaw in the process.exe test component, which was inadvertently killing its own process group. By tracking signals and tracing system activity, they were able to isolate the issue and uncover the root cause of the failures. Their meticulous approach and problem-solving tactics offer insights into the complexities of software debugging.
https://www.linux.it/~ema/posts/murder-mystery-gcc-builds-failing-after-sbuild-refactoring/