run-program doesn't close it's descriptors fast enough

(dotimes (i 1000) 
  (format t "bah ~A~%" i)
  (dotimes (i 100)
    (ext:run-program "echo" '("abcde") :wait t :output :stream)))

Condition of type: SIMPLE-ERROR
Unable to create stream for file descriptor 4093
C library explanation: Bad file descriptor.
Available restarts:

abcde
1. (RESTART-TOPLEVEL) Go back to Top-Level REPL.

Broken at SI:BYTECODES. [Evaluation of: (DOTIMES (I 1000) (FORMAT T "bah ~A~%" I) (SLEEP 1) (DOTIMES (I 100) (EXT:RUN-PROGRAM "echo" '("abcde") :WAIT T :OUTPUT :STREAM)))] In: #<process TOP-LEVEL>.

Proposed solution - check for error and force GC run if we're out of descritpors

(tested – it works if we put (ext:gc t) after format in example case

mentioned in issue #149 (closed)

basically it closes them, but gc isn't run often enough

Title changed from run-program doesn't close it's descriptors to run-program doesn't close it's descriptors fast enough

Proposed solution:

• when we ran out from the descriptors invoke GC
• if we still can't create the new one - proceed with the error

changed milestone to %ECL 16.2.0