hydra-queue-runner: Fix assertion failure

Dependencies

• [2] HUUZFPPK Fix race between the queue monitor and the builder threads
• [3] ODCBSLFG hydra-queue-runner: Fix segfault sorting machines by load
• [4] NNOCZ4RO hydra-queue-runner: Improve dispatcher
• [5] 24BMQDZA Start of single-process hydra-queue-runner

Change contents

• replacement in src/hydra-queue-runner/hydra-queue-runner.cc at line 866
  [3.67]→[3.67:204](∅→∅)
  − necessary to ensure that the sort comparator below is a

  − ordering. std::sort() can segfault if it isn't. */
  [3.67]

  [3.204]
  + necessary to ensure that the sort comparator below is

  + an ordering. std::sort() can segfault if it isn't. */
• replacement in src/hydra-queue-runner/hydra-queue-runner.cc at line 1206
  [2.5633]→[2.5633:5695](∅→∅)
  − if (rdep_->deps.empty()) runnable = true;
  [2.5633]

  [2.5695]
  + /* Note: if the step has not finished

  + initialisation yet, it will be made runnable in

  + createStep(), if appropriate. */

  + if (rdep_->deps.empty() && rdep->created) runnable = true;