doctest fails to allocate memory #271
Comments
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Is there a handy way of trying to reproduce this locally? e.g., I assume that it's not just a long command line that's the trigger, otherwise |
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I'm afraid I don't have a minimal repro. My guess is that it's more the number of packages being loaded, rather than the length of the command line. I can get |
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Ok, I weirdly found the problem. Here's the diff that I need to stop @@ -57,12 +57,6 @@ import qualified Data.MonotoneMap as MonotoneMap
import Data.Ratio.Extra
-{-# ann module "HLint: ignore Evaluate" #-}
-
-
-{-# ann module "HLint: ignore Use let" #-}
-
-
-- | Burden rates per role in $/hour
rates :: Durations Rational
rates =
``
That's right, it seems that module annotations are the source of the problem! |
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Ok, I might be slightly wrong there. The diff above is from a different branch I'm working on, but it doesn't fix {-# language TemplateHaskell #-}
{-# language TypeFamilies #-}
module Data.Units.US.Money where
-- units
import Data.Metrology
import Data.Metrology.TH
declareDimension "Cost"
declareCanonicalUnit "Dollar" [t| Cost |] ( Just "USD" )
type instance DefaultUnitOfDim Cost =
Dollar
declareDerivedUnit "Cent" [t| Dollar |] ( 1 / 100 ) ( Just "cent" ) |
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It seems to be related to actually starting the TH interpreter. If I compile this module with {-# language TypeFamilies #-}
module Data.Units.US.Money where
-- units
import Data.Metrology
data Cost = Cost
instance Dimension Cost
data Dollar = Dollar
instance Unit Dollar where
type BaseUnit Dollar = Canonical
type DimOfUnit Dollar = Cost
instance Show Dollar where
show _ = "USD"
type instance DefaultUnitOfDim Cost =
Dollar
data Cent = Cent
instance Unit Cent where
type BaseUnit Cent = Dollar
conversionRatio _ = 1.0e-2
instance Show Cent where
show _ = "cent"Which |
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Ok, final update - the
Allows |
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I had a go at reproducing this in https://github.com/quasicomputational/doctest-271 but If you've still got the reproducer handy, can you see if haddock works on it? doctest and haddock are actually quite similar: if haddock works, then it's some kind of doctest-specific bug, but if haddock fails it may ultimately be a GHC issue. |
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I unfortunately don't have a reproducible case around anymore. I'll close this for now. Hopefully the trail above may help anyone else who runs into this! |
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Seems I have this issue on ghc-8.10.3 on Linux (works on macOS). Is there any fix I can try to recipe how to debug it? It's a huge project with TH and seems that not all the packages with TH fails, so I'm not sure if I can extract the minimal case. |
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Try haddocking the project as above, and also manually going in with GHCi and trying some of the doctest examples. If either of those break, it's fundamentally going to be a GHC issue. Otherwise, I'm not sure there's much for it except lopping off leaf modules or removing doctests and seeing if things still break. |
I'm using
cabal-doctestand the following whopper of a command line is built:If I call
ghciwith these exact same arguments, it works - so I guess this is something specific to doctest.The text was updated successfully, but these errors were encountered: