7d18c013

By: Tom Sydney Kerckhove <syd@cs-syd.eu> 

Fix file locking: use withSystemTempFile with useHandleOpen for both stdout and stderr
Tree Timing
forwardCompatibilitymutation-really-safe-moneymutation-releasemutation-safe-coloured-textpre-commitreleaseshellconfiguredevShelldefaultx86_64-linux

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