}
			pc.can = can
			return pc
		}
	}
}

func (c *ProgCache) readLoop(readLoopDone chan<- struct{}) {
	defer close(readLoopDone)
	jd := json.NewDecoder(c.stdout)
	for {
		res := new(ProgResponse)
		if err := jd.Decode(res); err != nil {
			if c.closing.Load() {
				return // quietly
			}
			if err == io.EOF {
				c.mu.Lock()
				inFlight := len(c.inFlight)
				c.mu.Unlock()

00000030  cc ec a6 2d 10 87 19 5e  c9 fe cd 12 ae 1a 38 f9  |...-...^......8.|
00000040  78 f1 42 f8 47 26 1b c2  5f 82 a5 aa 65 17 eb 06  |x.B.G&.._...e...|
00000050  03 c8 22 9c 9f 8b 87 26  4a 64 18 93 9c f4 16 82  |.."....&Jd......|
00000060  28 eb 8d 2d f8 51 60 3a  f4 bb a3 77 f5 97 2b 6a  |(..-.Q`:...w..+j|
00000070  19 db 2e 46 8b d8 08 d8  28 88 bb bd d8 3b c2 bb  |...F....(....;..|

00000050  2d ea c1 44 1f e8 87 71  da 1e 26 72 a2 e9 40 0c  |-..D...q..&r..@.|
00000060  33 6e 6f 06 43 ed 7f fc  8f 4c d4 f4 0f 83 19 cb  |3no.C....L......|
00000070  52 a9 94 f3 6a 64 db dd  20 d1 a7 d4 c7 6e 86 ed  |R...jd.. ....n..|
00000080  6e ea 5c 66 d1 34 a6 92  7e b1 16 03 03 02 69 48  |n.\f.4..~.....iH|
00000090  13 97 82 60 46 e1 c9 02  d2 e1 f3 62 da d6 3a c1  |...`F......b..:.|

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