[GHC] #15595: Stack overflow in withArgs leads to infinite memory-consuming loop

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Mon Sep 3 12:32:26 UTC 2018


#15595: Stack overflow in withArgs leads to infinite memory-consuming loop
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        Reporter:  NeilMitchell   |                Owner:  (none)
            Type:  bug            |               Status:  new
        Priority:  normal         |            Milestone:  8.6.1
       Component:  Compiler       |              Version:  8.5
      Resolution:                 |             Keywords:
Operating System:  Windows        |         Architecture:  x86_64 (amd64)
 Type of failure:  Runtime crash  |            Test Case:
      Blocked By:                 |             Blocking:
 Related Tickets:                 |  Differential Rev(s):
       Wiki Page:                 |
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Comment (by osa1):

 Here's another reproducer:

 {{{#!haskell
 import Control.Exception (mask_)

 main :: IO ()
 main = mask_ (print (foldl (+) 0 [0 .. 1000000]))
 }}}

 If you remove `mask_` this fails with stack overflow (add `+RTS -K1K`).
 With `mask_` it gets stuck in the same loop as the original program.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15595#comment:4>
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