Dennis Klein f08d42fcb8 fix: serialize console output in fair::mq::tools::execute ...

- concurrent execute() calls print captured subprocess lines to
  std::cout from multiple threads; the standard allows that, but
  libstdc++ maintains the formatted-output state (ios_base::width)
  with plain reads and writes -- a data race ThreadSanitizer reports
  once libstdc++ itself is instrumented
- a mutex around the insertion also keeps whole lines from
  interleaving

2026-06-10 19:31:19 +02:00

5.6 KiB

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