The expression return $this->forked ?? ...o\Process\Piping($this) returns the type Carno\Process\Piping which is incompatible with the documented return type Carno\Process\Program.
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}
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/**
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* @param Piping $piping
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* @return static
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*/
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final public function forked(Piping $piping) : self
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{
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$this->forking($piping);
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return $this;
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}
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/**
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* triggered when process forking (still in parent process)
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* @param Piping $piping
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*/
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abstract protected function forking(Piping $piping) : void;
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/**
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* triggered when process started (in child process)
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*/
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abstract protected function starting() : void;
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/**
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* triggered when process exiting (in child process)
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* @param Promised $wait
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*/
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abstract protected function stopping(Promised $wait) : void;
carno-php /
process
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