diff options
| author | hallgren <hallgren@chalmers.se> | 2013-01-29 13:59:20 +0000 |
|---|---|---|
| committer | hallgren <hallgren@chalmers.se> | 2013-01-29 13:59:20 +0000 |
| commit | 211cd9bb25c7928b94976a9b8bb1124a0578b59e (patch) | |
| tree | f7f6ba73aa9998f2c986a74143f1c00e6c82d4bc /src/runtime | |
| parent | 84fa796de4e9b5443a2857eae0878bf26c605cc0 (diff) | |
Avoid crash in random generation with probabilities
Diffstat (limited to 'src/runtime')
| -rw-r--r-- | src/runtime/haskell/PGF/Generate.hs | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/runtime/haskell/PGF/Generate.hs b/src/runtime/haskell/PGF/Generate.hs index 33021066e..ae6abc938 100644 --- a/src/runtime/haskell/PGF/Generate.hs +++ b/src/runtime/haskell/PGF/Generate.hs @@ -169,6 +169,6 @@ instance RandomGen g => Selector (Identity g) where hit :: Double -> [(Double,Expr,TType)] -> (Double,(Expr,TType),[(Double,Expr,TType)]) hit d (gen@(p,e,ty):gens) - | d < p = (p,(e,ty),gens) + | d < p || null gens = (p,(e,ty),gens) | otherwise = let (p',e_ty',gens') = hit (d-p) gens in (p',e_ty',gen:gens') |