truncate /= double2Int
There is a rule in libraries/base/GHC/Float.hs:
"truncate/Double->Int" truncate = double2Int
But it is not true for some values. Particularly,
let infinity = 1/0 :: Double
truncate infinity :: Int == 0
double2Int infinity == -9223372036854775808 -- minBound
As a result, the value of truncate (1/0 :: Double) :: Int
depends on optimization level.
Trac metadata
Trac field | Value |
---|---|
Version | 7.10.2 |
Type | Bug |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | libraries/base |
Test case | |
Differential revisions | |
BlockedBy | |
Related | |
Blocking | |
CC | |
Operating system | |
Architecture |