GHC 7.10.1 segfaults when shiftL-ing Integers by negative amounts
For numbers other than 1, anyway.
$ ghc -e 'Data.Bits.shiftL 1 (-1)'
-9223372036854775808
$ ghc -e 'Data.Bits.shiftL 2 (-1)'
zsh: segmentation fault ghc -e 'Data.Bits.shiftL 2 (-1)'
$ ghc -e 'Data.Bits.shiftL 100 (-1)'
zsh: segmentation fault ghc -e 'Data.Bits.shiftL 100 (-1)'
This also happens with a compiled program. It doesn't with shiftR
in either case though.
Side notes:
- On OS X, when the first operand is also negative, I get a
bus error
instead of asegmentation fault
. Linux givessegmentation fault
on both. - On Linux, you have to use
ghci
instead of-e
, for some (probably unrelated?) reason).
Trac metadata
Trac field | Value |
---|---|
Version | 7.10.1 |
Type | Bug |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | Compiler |
Test case | |
Differential revisions | |
BlockedBy | |
Related | |
Blocking | |
CC | |
Operating system | |
Architecture |