Benchmark WordFrequencies/Text fails with out of memory exception.

[AndreasPK]

Tested on both ghc-head and 8.2 with text-1.2.3

benchmarking WordFrequencies/Text
text-benchmarks: Out of memory

  12,542,999,224 bytes allocated in the heap
       8,575,376 bytes copied during GC
   9,920,342,664 bytes maximum residency (4 sample(s))
       1,144,184 bytes maximum slop
            9460 MB total memory in use (0 MB lost due to fragmentation)

                                     Tot time (elapsed)  Avg pause  Max pause
  Gen  0      2318 colls,     0 par    0.008s   0.008s     0.0000s    0.0002s
  Gen  1         4 colls,     0 par    0.009s   0.009s     0.0021s    0.0069s

  INIT    time    0.000s  (  0.000s elapsed)
  MUT     time    0.384s  (  0.384s elapsed)
  GC      time    0.017s  (  0.016s elapsed)
  EXIT    time    0.000s  (  0.000s elapsed)
  Total   time    0.401s  (  0.401s elapsed)

  %GC     time       0.0%  (0.0% elapsed)

  Alloc rate    32,637,414,579 bytes per MUT second

  Productivity  95.8% of total user, 95.9% of total elapsed

[hvr]

I suspect this to be a duplicate of #221

[bgamari]

This doesn't appear to be a duplicate of #227; I have confirmed that it occurred before cfb8278.

[Bodigrim]

This seems to be fixed now.