Synchronize ByteString and String modules #228
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hasufell
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Jul 16, 2022
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hasufell
commented
Jul 17, 2022
hs-viktor
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Jul 17, 2022
System/Posix/Env/ByteString.hsc
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| putEnv :: ByteString {- ^ "key=value" -} -> IO () | ||
| putEnv keyvalue = B.useAsCString keyvalue $ \s -> | ||
| throwErrnoIfMinus1_ "putenv" (c_putenv s) | ||
| putEnv (PS fp _ l) = withForeignPtr fp $ \p -> do |
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Is this code really going to be built against ancient bytestring versions that have PS instead of BS? And if it were, it would be very wrong to ignore the offset. Use BS instead.
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Using BS would require build-depends: bytestring >= 0.11. That's acceptable, but it's easy to be more conservative with
putEnv (PS fp o l) = withForeignPtr fp $ \p -> do ... (p `plusPtr` o)
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Sorry... it was almost 2 am at night.
And fix free-bug in 'putEnv'. Fixes haskell#68
hasufell
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Jul 17, 2022
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| test :: TestTree | ||
| test = testCase "putEnv" $ do | ||
| performMinorGC | ||
| env <- System.Posix.Env.ByteString.getEnv (fromString "foo") | ||
| performMinorGC | ||
| print env | ||
| env <- System.Posix.Env.ByteString.getEnv (fromString "foo") | ||
| performMinorGC | ||
| print env | ||
| env <- System.Posix.Env.ByteString.getEnv (fromString "foo") | ||
| performMinorGC | ||
| print env | ||
| env <- System.Posix.Env.ByteString.getEnv (fromString "foo") | ||
| print env | ||
| env @?= Just (fromString "bar") |
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The failure is a little hard to trigger... but this worked for me and the prints are necessary.
Bodigrim
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Jul 17, 2022
This was referenced Jul 19, 2022
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And fix free-bug in 'putEnv'. Fixes #68