{3} Feature requests by priority (729 matches)

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Ticket Summary Component Version Priority Severity Milestone Owner Status Created
#9784 Improve error message for misplaced quote inside promoted qualified type Compiler (Parser) 7.8.3 normal new Nov 8, 2014
#9789 Make GHC accept .format+lhs as extension for literate haskell files Compiler 7.9 normal merijn new Nov 11, 2014
#9790 Produce coercion rules for derived Functor instances Compiler 7.9 normal new Nov 11, 2014
#9819 Create typesafe method of obtaining dictionary types from class definitions, and constraint objects from dictionary types Compiler normal new Nov 21, 2014
#9835 Add bindings for marshaling to/from mpz_t libraries (other) 7.8.3 normal new Nov 25, 2014
#9898 Wanted: higher-order type-level programming Compiler (Type checker) 7.8.3 normal new Dec 18, 2014
#9923 Offer copy-on-GC sliced arrays Runtime System 7.11 normal new Dec 24, 2014
#9931 Option to truncate Show output in ghci REPL GHCi 7.8.4 normal new Dec 27, 2014
#9938 GHC's link step needs to be told which packages to link Compiler 7.11 normal new Dec 29, 2014
#9948 Recommend class constraint instead of instance constraint Compiler 7.8.4 normal new Jan 1, 2015
#9974 Allow more general structural recursion without UndecidableInstances Compiler (Type checker) 7.11 normal new Jan 9, 2015
#9990 Top level module identifiers shadow imported identifiers Compiler normal new Jan 15, 2015
#9993 PostfixOperators doesn't work for types Compiler 7.8.4 normal new Jan 16, 2015
#9995 :info enhancements GHCi 7.8.4 normal new Jan 16, 2015
#10016 UNPACK support for existentials Compiler 7.8.4 normal new Jan 23, 2015
#10049 Lower level memcpy primop Compiler 7.8.4 normal new Jan 30, 2015
#10076 Don't suppress warnings in the presence of errors Compiler 7.11 normal new Feb 10, 2015
#10084 Data.List should have a takeLastN function libraries/base 7.8.4 normal new Feb 12, 2015
#10087 DefaultSignatures: error message mentions internal name Compiler (Type checker) 7.8.4 normal new Feb 14, 2015
#10089 feature: warn about unused data definitions (with typeclass instances) Compiler 7.8.4 normal new Feb 15, 2015
#10116 Closed type families: Warn if it doesn't handle all cases Compiler 7.8.4 normal new Feb 25, 2015
#10225 GHC does not specialize based on type equality Compiler 7.10.1 normal infoneeded Apr 1, 2015
#10235 Get profiling info without stopping program Compiler 7.10.1 normal new Apr 3, 2015
#10327 Devise workaround for how infinite types prevent closed type family reduction Compiler 7.10.1 normal new Apr 20, 2015
#10350 Should be able to specify path for eventlog output. Runtime System 7.10.1 normal simonmar new Apr 24, 2015
#10453 \case should trigger auto-multiline mode in ghci Compiler 7.10.1 normal new May 27, 2015
#10465 Make listArray non-strict in structure of argument list Core Libraries 7.10.1 normal new May 30, 2015
#10478 Shorter import syntax Compiler 7.10.1 normal new Jun 3, 2015
#10505 more specific types in the generated *_stub.h files Compiler (FFI) 7.6.1 normal new Jun 10, 2015
#10514 Generic for existential types Core Libraries 7.10.1 normal new Jun 12, 2015
#10606 avoid redundant stores to the stack when examining already-tagged data Compiler (CodeGen) 7.11 normal new Jul 5, 2015
#10607 Auto derive from top to bottom Compiler 7.11 normal new Jul 6, 2015
#10613 Mechanism for checking that we only enter single-entry thunks once Compiler 7.10.1 normal new Jul 8, 2015
#10621 Handle annotations in hsig/boot files GHC API 7.10.1 normal spinda new Jul 8, 2015
#10652 Better cache performance in Array# Compiler 7.10.1 normal new Jul 17, 2015
#14003 Allow more worker arguments in SpecConstr Compiler 8.2.1-rc3 normal 8.2.2 new Jul 20, 2017
#3427 control what sort of entity a deprecated pragma applies to Compiler 6.10.4 normal normal 8.4.1 thoughtpolice new Aug 12, 2009
#4879 Deprecate exports Compiler 7.0.1 normal 8.4.1 new Jan 5, 2011
#7860 Add more bit fiddling functions to 'integer-gmp' Core Libraries 7.6.3 normal 8.4.1 hvr new Apr 23, 2013
#8634 Relax functional dependency coherence check ("liberal coverage condition") Compiler (Type checker) 7.7 normal 8.4.1 new Dec 27, 2013
#9244 Compiler could warn about type variable shadowing, and hint about ScopedTypeVariables Compiler 7.6.3 normal 8.4.1 new Jun 27, 2014
#9793 Some as-patterns could be accepted in pattern synonyms Compiler (Type checker) 7.8.3 normal 8.4.1 new Nov 11, 2014
#10431 EqualityConstraints extension? Compiler (Type checker) 7.11 normal 8.4.1 new May 18, 2015
#10789 Notify user when a kind mismatch holds up a type family reduction Compiler 7.10.2 normal 8.4.1 new Aug 24, 2015
#10803 New SignatureSections extension Compiler 7.10.2 normal 8.4.1 hvr patch Aug 28, 2015
#10915 Statistical profiling support in the RTS Compiler 7.10.2 normal 8.4.1 bgamari patch Sep 26, 2015
#10933 REMOVED pragma Compiler 7.10.2 normal 8.4.1 new Oct 5, 2015
#10972 Add a :binfo (beginner info) GHCi command Compiler 7.10.2 normal 8.4.1 kanetw new Oct 15, 2015
#11222 Teach strictness analysis about `catch`-like operations Compiler 7.10.3 normal 8.4.1 dfeuer new Dec 14, 2015
#11243 Flag to not expand type families Compiler 7.10.2 normal 8.4.1 new Dec 17, 2015
#11409 Cannot instantiate literals using TypeApplications Compiler 8.0.1-rc1 normal 8.4.1 new Jan 11, 2016
#11457 Run type-checker plugins before GHC's solver Compiler (Type checker) 8.0.1-rc1 normal 8.4.1 new Jan 18, 2016
#11594 closed empty type families fully applied get reduced lazily when in a constraint tuple and fully applied Compiler (Type checker) 7.10.2 normal 8.4.1 new Feb 17, 2016
#11686 implicit call stacks should provide a way to get the calling function's name Compiler 7.10.3 normal 8.4.1 gridaphobe new Mar 7, 2016
#11765 Allow documentary type signatures Compiler (Type checker) 7.10.3 normal 8.4.1 new Mar 28, 2016
#11798 Explicit recompilation required to change compilation options Compiler 7.10.3 normal 8.4.1 patch Apr 6, 2016
#11953 Export Word32#, Word64# on all architectures Compiler 7.10.3 normal 8.4.1 new Apr 19, 2016
#12389 Limit duplicate export warnings for datatypes Compiler 7.10.3 normal 8.4.1 new Jul 13, 2016
#12428 Allow pattern synonyms to optionally carry coerceability Compiler 8.0.1 normal 8.4.1 new Jul 23, 2016
#12498 Support unconventionally named import libraries Runtime System (Linker) 8.0.1 normal 8.4.1 Phyx- new Aug 18, 2016
#12669 Add some weird Kmettian tests to the test suite Test Suite 8.0.1 normal 8.4.1 new Oct 6, 2016
#12982 Missed constant folding oportunities libraries/hoopl 8.0.1 normal 8.4.1 new Dec 15, 2016
#13065 Prohibit user-defined Generic and Generic1 instances Compiler 8.0.1 normal 8.4.1 new Jan 4, 2017
#13152 Provide a mechanism to notify build system when .hi file is ready Driver 8.1 normal 8.4.1 new Jan 19, 2017
#13176 Deprecate the realWorld# Compiler 8.1 normal 8.4.1 new Jan 24, 2017
#13189 Implement same specification as GHC spec file for mingw32 Compiler 8.0.1 normal 8.4.1 Phyx- new Jan 26, 2017
#13240 Make it easier to find builds we may want to cancel Trac & Git 8.0.1 normal 8.4.1 mpickering new Feb 8, 2017
#13276 Unboxed sums are not Typeable Compiler 8.0.1 normal 8.4.1 new Feb 12, 2017
#13360 Add a flag to enable inferring HasCallStack constraints Compiler 8.0.1 normal 8.4.1 new Mar 1, 2017
#13362 GHC first generation of GC to be as large as largest cache size by default Runtime System 8.0.2 normal 8.4.1 new Mar 2, 2017
#13443 Typeclass resolution errors quite puzzling Compiler (Type checker) 8.0.1 normal 8.4.1 new Mar 18, 2017
#13511 ApplicativeDo return case doesn't handle lets Compiler 8.0.2 normal 8.4.1 new Apr 2, 2017
#13554 Allow the user to provide a C function that is called on each thread the RTS creates before running any Haskell code Runtime System 8.0.1 normal 8.4.1 new Apr 9, 2017
#13654 Optimize casMutVar# for single-threaded runtime Runtime System 8.2.1-rc1 normal 8.4.1 new May 6, 2017
#13683 Use epoll rather than poll where appropriate Core Libraries 8.0.1 normal 8.4.1 new May 10, 2017
#13686 Compile a few modules for profiling unconditionally Build System 8.2.1-rc2 normal 8.4.1 new May 11, 2017
#13723 Recover gracefully from simplifier tick exhaustion Compiler 8.2.1-rc2 normal 8.4.1 new May 18, 2017
#13753 Improve GHC's ghc package environment lookup logic Compiler 8.0.1 normal 8.4.1 new May 25, 2017
#13944 Introduce synchronized FFI Compiler 8.0.1 normal 8.4.1 new Jul 9, 2017
#14252 ApplicativeDo: Add compiler message about irrefutable pattern matches and Monad constraints Compiler 8.2.1 normal 8.4.1 new Sep 19, 2017
#393 functions without implementations Compiler (Type checker) None normal normal Iceland_jack new May 26, 2005
#436 Declare large amounts of constant data Compiler None normal minor new Aug 11, 2005
#472 Supertyping of classes Compiler (Type checker) None normal minor new Oct 20, 2005
#728 switch to compacting collection when swapping occurs Runtime System 6.4.1 normal major new Mar 16, 2006
#750 Set -M, -H, -c and other memory-related values based on available virtual/physical memory Runtime System 6.4.1 normal normal new Apr 19, 2006
#881 Improve space profiling for references Profiling 6.4.2 normal normal new Aug 31, 2006
#1262 RecursiveDo in Template Haskell Template Haskell 6.6 normal normal mgsloan new Apr 3, 2007
#1273 would like to print partial application values when at a breakpoint GHCi 6.7 normal normal new Apr 12, 2007
#1399 better support for developing threaded applications in ghci GHCi 6.6.1 normal normal new May 31, 2007
#1409 Allow recursively dependent modules transparently (without .hs-boot or anything) Compiler 6.10.2 normal normal new Jun 4, 2007
#1444 Template Haskell: add proper support for qualified names in non-splicing applications Template Haskell 6.6.1 normal normal new Jun 21, 2007
#1451 Provide way to show the origin of a constraint Compiler (Type checker) 6.6.1 normal normal new Jun 22, 2007
#1475 Adding imports and exports with Template Haskell Template Haskell 6.8.2 normal normal new Jul 1, 2007
#1532 Implicit parameters are not available in breakpoints GHCi 6.7 normal normal new Jul 13, 2007
#1800 Template Haskell support for running functions defined in the same module Template Haskell 7.7 normal normal new Oct 24, 2007
#1826 unable to list source for <exception thrown> should never occur GHCi 6.8.1 normal normal new Nov 4, 2007
#1921 change default to support extensions that involve a change of syntax Compiler 6.8.1 normal normal new Nov 23, 2007
#1974 length "foo" doesn't work with -XOverloadedStrings Compiler 6.8.1 normal minor new Dec 12, 2007
#2041 Allow splicing in concrete syntax Template Haskell 6.8.2 normal normal new Jan 13, 2008
#2101 Allow some form of type-level lemma Compiler 6.8.2 normal normal new Feb 15, 2008
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