Joseph Ferano
3ace7c262f
The mutation pass turned up one defect that did not make the suite go red: a reader branch that forgets to advance reads the same character for ever, and dune test waits as long as it is left to. In CI that is a job killed by the runner with nothing named and no output to read. watchdog.ml puts an alarm on every test binary — generous, because an alarm that fires on a slow machine is a flake — and a five-second one around each read in test_flan, where the budget really is small. The first read that does not return wedges the rest, so a looping reader costs five seconds and names the row instead of costing eight minutes or never finishing. Both were watched: the string-escape loop now fails in five seconds with the case named, and the per-binary backstop was armed short and observed to fire.
