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- Dec 11, 2023
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Arnaud Spiwack authored
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Before this change, GHC used to accept `forall` as a term-level identifier: -- from constraints-0.13 forall :: forall p. (forall a. Dict (p a)) -> Dict (Forall p) forall d = ... Now it is a parse error. The -Wforall-identifier warning has served its purpose and is now a deprecated no-op.
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- Dec 08, 2023
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Relevant to #3458
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Simon Peyton Jones authored
This MR fixes a very subtle bug exposed by #24242. See Note [Environment for simplLetUnfolding]. I also updated a bunch of Notes on shadowing
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Add test case for bug #24224
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Related changed function's docs: -GHC.Unicode.isAlpha -GHC.Unicode.isPrint -GHC.Unicode.isAlphaNum Add more details for what the function will return. Co-authored-by:Bodigrim <andrew.lelechenko@gmail.com>
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This patch does two things, to fix #23209: * It improves SpecConstr so that it no longer quantifies over coercion variables. See Note [SpecConstr and casts] * It improves the rule matcher to deal nicely with the case where the rule does not quantify over coercion variables, but the the template has a cast in it. See Note [Casts in the template]
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This partially fixes #24229. See the new Note [Pattern duplicate elimination] in SpecConstr
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Otherwise we run into a panic in hscMaybeWriteIface: "Unexpected DT_Dyn state when writing simple interface" when dynamic-too is enabled We could remove the panic and just write the interface even if the state is `DT_Dyn`, but it seems pointless to run the pipeline twice when `hscMaybeWriteIface` is already designed to write both `hi` and `dyn_hi` files if dynamic-too is enabled. Fixes #23944.
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- Dec 06, 2023
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See the new `Note [Dead code may contain type confusions]`. Fixes #23862.
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StgCse can revive dead binders: case foo of dead { Foo x y -> Foo x y; ... } ===> case foo of dead { Foo x y -> dead; ... } -- dead is no longer dead So we must zap occurrence information on case binders. Fix #14895 and #24233 -
The filepath bump to 1.4.200.1 introduces a deprecation warning. See ghc/ghc#24240 https://github.com/haskell/filepath/pull/206
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We modify the submodule linter so that if the bumped commit is a specific tag then the commit is accepted. Fixes #24241
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Updates filepath submodule Updates unix submodule Fixes #24240
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Before, the source location would point at the surrounding function definition, causing the confusion in #24234. I also took the opportunity to introduce a new `LazyPatCtx :: HsMatchContext _` to make the warning message say "irrefutable pattern" instead of "pattern binding".
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This patch implements the T2T (term-to-type) transformation in patterns. Patterns that are checked against a visible forall can now be written without the `type` keyword: \(type t) (x :: t) -> ... -- old \t (x :: t) -> ... -- new The `t` binder is parsed and renamed as a term pattern (Pat), but then undergoes a conversion to a type pattern (HsTyPat). See the new function pat_to_type_pat in compiler/GHC/Tc/Gen/Pat.hs
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Previously, when running `ghci -e ':add Sample.hs'` the process would exit with exit code 1 if the file exists and could be loaded. Fixes #24115
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- Dec 03, 2023
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I accidentally left a trace in the generics metric patch.
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For consistency it's better if we track all size metrics in bytes. Metric Increase: libdir
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cee81370 recently added a test which failed on deb9 because the version of make was emitting the recipe failure to stdout rather than stderr. One way to fix this is to be more precise in the test about which part of the output we care about inspecting.
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- Nov 30, 2023
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We now require that in 'forall a -> ty', ty has kind TYPE r for some r. Fixes #24176
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EpaLocation is used to position things. It has two constructors, EpaSpan holding a SrcSpan, and EpaDelta with a delta position and a possible list of comments. The comment list is needed because the location in EpaDelta has no absolute information to decide which comments should be emitted before them when printing. But it is also used for specifying the position of a comment. To prevent the absurdity of a comment position having a list of comments in it, we make EpaLocation parameterisable, using comments for the normal case and a constant for within comments. Updates haddock submodule. aarch64-darwin Metric Decrease: MultiLayerModulesTH_OneShot -
And additionally to T12545, link from T8095, T13386 to this new Note.
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- Nov 29, 2023
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We no longer need the alternative variant of addLocM (addLocMA) nor wrapLocAM, wrapLocSndMA. aarch64-darwin Metric Increase: MultiLayerModulesTH_OneShot deb10-numa-slow Metric Decrease: libdir
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