#9306: Crash when shifting Integers too far left -------------------------------------+------------------------------------ Reporter: dfeuer | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: libraries/base | Version: 7.8.3 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Unknown/Multiple Type of failure: Runtime crash | Difficulty: Unknown Test Case: | Blocked By: Blocking: | Related Tickets: -------------------------------------+------------------------------------ Description changed by dfeuer: Old description:
When shifting an Integer by `fromIntegral (maxBound::Int) + 2` or more, the RTS crashes. The attached program gives the following output (on x86_64, at least):
[dfeuer@lemur src]$ ./shiftcrash Okay 0 gmp: overflow in mpz type Aborted
I found the bug in 7.6.3, but it's been verified to be present also in 7.8.3. The crash also occurs when running similar code in GHCi.
New description: When shifting an Integer very far left, the RTS crashes. On x86_64: Prelude Data.Bits> 1 `shiftL` 100000000000000000000000 == 1 gmp: overflow in mpz type Aborted I found the bug in 7.6.3, but it's been verified to be present also in 7.8.3. The crash also occurs when running similar code compiled by ghc. -- -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9306#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler