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Retry heap-exhausted package builds with compacting GC #822

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Merged
f-f merged 2 commits into from
Nov 14, 2026
Merged

Retry heap-exhausted package builds with compacting GC #822

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dcabdb6
Retry heap-exhausted package builds with compacting GC
thomashoneyman Nov 14, 2026
a4f5f8d
Avoid fixed limits in compiler retry descriptions
thomashoneyman Nov 14, 2026
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9 changes: 8 additions & 1 deletion app/src/App/CLI/Purs.purs
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Original file line number Diff line number Diff line change
Expand Up @@ -205,7 +205,9 @@ isCompilerRaceCondition failure = case failure of
_ -> false

-- | Compile PureScript source files with automatic retry for transient errors.
-- | Retries up to 3 times when the "Unexpected end of JSON input" race condition occurs.
-- | Uses bounded retries when the "Unexpected end of JSON input" race condition occurs.
-- | Package builds that exhaust the heap get one serial, compacting attempt with
-- | the same heap limit, using the profile already used for whole package sets.
compile
:: forall r
. { globs :: Array FilePath, profile :: CompileProfile, version :: Maybe Version, cwd :: Maybe FilePath }
Expand All @@ -218,6 +220,11 @@ compile { globs, profile, version, cwd } = go 1
go attempt = do
result <- Run.liftAff $ callCompiler { command: Compile { globs, profile }, version, cwd }
case result of
Left err | isCompilerHeapExhaustion err -> case profile of
PackageBuild -> do
Log.warn "Compiler heap exhausted; retrying once with serial compilation and compacting GC at the same heap limit."
Run.liftAff $ callCompiler { command: Compile { globs, profile: PackageSetBuild }, version, cwd }
PackageSetBuild -> pure result
Left err | isCompilerRaceCondition err && attempt < maxRetries -> do
Log.warn $ "Compiler race condition detected (attempt " <> show attempt <> "/" <> show maxRetries <> "), retrying..."
go (attempt + 1)
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