Data/Map/Static/Builder.hs: avoid shiftL with negative offset #11
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On ghc-8.8 building `encoding` fails as:
```
Preprocessing library for encoding-0.8.5..
arithmetic overflow
```
This happens because `findSplitSize` can't handle
small values, like `findSplitSize 1` and calls `shiftL`
with negative value, which is forbdden:
https://hackage.haskell.org/package/base-4.14.0.0/docs/Data-Bits.html#v:shiftL
Work it around by always passing non-negative offset.
Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
swamp-agr
approved these changes
Aug 30, 2021
|
Hi @trofi, thanks for your contribution! |
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On ghc-8.8 building
encodingfails as:This happens because
findSplitSizecan't handlesmall values, like
findSplitSize 1and callsshiftLwith negative value, which is forbdden:
https://hackage.haskell.org/package/base-4.14.0.0/docs/Data-Bits.html#v:shiftL
Work it around by always passing non-negative offset.