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Ticket Summary Status Owner Priority Milestone Component
#4800 Memory Leak when Compiling qtHaskell new low 7.12.1 Compiler
#7289 Mingw FPU init not Windows compatible. new normal 7.12.1 Runtime System
#1216 Missed opportunity for let-no-esape new simonpj normal 7.12.1 Compiler
#2439 Missed optimisation with dictionaries and loops new simonpj lowest 7.12.1 Compiler
#9687 Missing Typeable instances for built-in types new normal Compiler
#8034 Missing ambiguity test for class methods new normal 7.12.1 Compiler (Type checker)
#9225 Missing syntax error for package qualified import with version number new ezyang normal Compiler (Parser)
#5267 Missing type checks for arrow command combinators new ross low 7.12.1 Compiler (Type checker)
#1620 ModBreaks.modBreaks_array not initialised new normal 7.12.1 GHCi
#9717 More lazy orphan module loading new ezyang normal 7.12.1 Compiler (Type checker)
#10075 Muddling Constraint and * means that Core is inconsistent new normal Compiler
#2374 MutableByteArray# is slower than Addr# new lowest 7.12.1 Compiler (NCG)
#9041 NCG generates slow loop code new normal Compiler (NCG)
#9388 Narrow the scope of the notorious "state hack" new normal Compiler
#8971 Native Code Generator for 7.8 is not as optimized as 7.6.3... new normal 7.12.1 Compiler (NCG)
#8178 Need TypeRep for Symbol and numeric type literals; and Typeable instances new diatchki normal Compiler
#9123 Need for higher kinded roles new goldfire normal 7.12.1 Compiler
#2289 Needless reboxing of values when returning from a tight loop new lowest 7.12.1 Compiler
#9238 Negative zero broken new normal 7.12.1 Compiler
#7930 Nested STM Invariants are lost new fryguybob normal Runtime System
#9929 New alias handling not compatible with LLVM 3.4 new high 7.10.1 Compiler (LLVM)
#7198 New codegen more than doubles compile time of T3294 new simonmar normal 7.12.1 Compiler
#3872 New way to make the simplifier diverge new normal Compiler
#10118 No ambiguity check when `ConstrainedClassMethods` is on patch normal 7.12.1 Compiler (Type checker)
#9509 No automatic specialization of inlinable imports in 7.8 new normal Compiler
#9887 No message when GCHI reusing compiled code new normal GHCi
#8871 No-op assignment I64[BaseReg + 784] = I64[BaseReg + 784]; is generated into optimized Cmm new normal Compiler (CodeGen)
#8970 Non-exhaustive pattern match warning with DataKinds and TypeFamilies new normal Compiler
#2260 Non-ideal error message for misplaced LANGUAGE pragma new lowest 7.12.1 Compiler (Parser)
#4899 Non-standard compile plus Template Haskell produces spurious "unknown symbol" linker error new simonmar low 7.12.1 Compiler
#8399 Of Bird tacks and non-blank blank lines new low Compiler
#8198 One-shot mode is buggy w.r.t. hs-boot files new parcs normal 7.12.1 Driver
#10005 Operations on string literals won't be inlined new normal Compiler
#7596 Opportunity to improve CSE new simonpj normal 7.12.1 Compiler
#1168 Optimisation sometimes decreases sharing in IO code new normal Compiler
#1498 Optimisation: eliminate unnecessary heap check in recursive function new low 7.12.1 Compiler
#4301 Optimisations give bad core for foldl' (flip seq) () new low 7.12.1 Compiler
#2132 Optimise nested comparisons new normal Compiler
#2387 Optimizer misses unboxing opportunity new lowest 7.12.1 Compiler
#8629 Option 'split-objs' being ignored when trying to reduce object code size in iOS cross-compilation new normal Compiler
#8363 Order matters for unused import warnings when reexporting identifiers new normal Compiler
#8082 Ordering of assembly blocks affects performance new normal Compiler (NCG)
#5316 Orphan instances strike again: ghc rejects a program at first but will accept it if you repeat the same compilation command new low Compiler
#10103 Outdated comment (or bug?) in `types/TyCon.hs` new normal 7.12.1 Compiler (Type checker)
#3107 Over-eager GC when blocked on a signal in the non-threaded runtime new lowest 7.12.1 Runtime System
#8710 Overlapping patterns warning misplaced new low Compiler
#9951 OverloadedLists breaks exhaustiveness check new normal Compiler
#9809 Overwhelming the TimerManager new simonmar normal Runtime System
#9297 Packages linked against certain Windows .dll files give warnings at runtime new simonmar normal Runtime System
#10052 Panic (something to do with floatExpr?) new simonmar high 7.10.1 Compiler
#9046 Panic in GHCi when using :print new normal 7.12.1 GHCi
#7078 Panic using mixing list with parallel arrays incorrectly new chak normal 7.12.1 Compiler
#10058 Panic: Loading temp shared object failed patch highest 7.10.1 Runtime System
#9160 Panic: Template variable unbound in rewrite rule new normal 7.8.3 Compiler
#7380 Panic: mkNoTick: Breakpoint loading modules with -O2 via API new normal 7.12.1 GHC API
#9219 Parallel build proceeds despite errors new normal Driver
#6034 Parse error when using ' with promoted kinds new low Compiler (Parser)
#8956 Parser error shadowed by "module ‘main:Main’ is defined in multiple files" error new normal Compiler
#4043 Parsing of guards, and type signatures new normal Compiler (Parser)
#3766 Parsing of lambdas is not consistent with Haskell'98 report. new low 7.12.1 Compiler (Parser)
#9554 Pathological type family turns type error into runtime loop new normal Compiler
#9088 Per-thread Haskell thread list/numbering (remove global lock from thread allocation) new simonmar low Runtime System
#9944 Performance issue re: simple loop new low Compiler
#9960 Performance problem with TrieMap new normal Compiler
#5954 Performance regression 7.0 -> 7.2 (still in 7.4) new simonpj normal 7.12.1 Compiler
#9979 Performance regression GHC 7.8.4 to GHC HEAD new normal Compiler
#6166 Performance regression in mwc-random since 7.0.x new normal 7.12.1 Compiler
#8990 Performance tests behave differently depending on presence of .hi file (even with -fforce-recomp) new normal Test Suite
#3231 Permission denied error with runProcess/openFile new simonmar normal 7.12.1 Core Libraries
#5326 Polymorphic instances aren't automatically specialised new simonpj low 7.12.1 Compiler
#9730 Polymorphism and type classes new normal Compiler (Type checker)
#4288 Poor -fspec-constr-count=n warning messages new low 7.12.1 Compiler
#9803 Poor error message for unbound variable in pattern synonym new normal Compiler
#9981 Potential typechecker regression in GHC 7.10.1RC new simonpj normal 7.12.1 Compiler (Type checker)
#1727 Precedence and associativity rules ignored when mixing infix type and data constructors in a single expression new lowest 7.12.1 Compiler (Parser)
#9894 Presence of DWARF debug symbols doesn't result in working backtraces in GDB new scpmw normal Compiler
#9121 Presence of dyn_o files not checked upon recompilation new high Build System
#8403 Pretty-printing of long types new lowest Compiler
#4101 Primitive constant unfolding new schyler low 7.12.1 Compiler
#8472 Primitive string literals prevent optimization new xnyhps normal Compiler
#9494 Probable data corruption with GHCi 7.8.* and Zlib infoneeded aseipp high GHCi
#1158 Problem with GADTs and explicit type signatures new simonpj lowest Compiler
#9421 Problems and workarounds when installing and using a 32bit GHC on 64bit Linux machine new MikolajKonarski normal Compiler
#9105 Profiling binary consumes CPU even when idle on Linux. new simonmar normal Runtime System
#8811 Profiling output jumbled together new normal Profiling
#8948 Profiling report resolution too low new normal Profiling
#5654 Profiling semantics bug new simonmar low 7.12.1 Profiling
#6113 Profiling with -p not written if killed with SIGTERM new normal 7.12.1 Profiling
#9407 Program produces different output when compiled with -O new normal Compiler
#9607 Programs that require AllowAmbiguousTypes in 7.8 new normal Compiler (Type checker)
#10077 Providing type checker plugin on command line results in false cyclic import error new normal Compiler (Type checker)
#1147 Quadratic behaviour in the compacting GC new normal Runtime System
#5376 Quotation in System.Process.system for Windows new snoyberg low 7.12.1 Core Libraries
#8665 RELEASE_LOCK: I do not own this lock infoneeded normal Runtime System
#9839 RTS options parser silently accepts invalid flags new simonmar normal Runtime System
#7398 RULES don't apply to a newtype constructor new normal 7.12.1 Compiler
#9292 Race condition when multiple threads wait for a process new ekmett normal Core Libraries
#427 Random.StdGen slowness new ekmett normal Core Libraries
#8346 Rank 1 type signature still requires RankNTypes new normal Compiler (Type checker)
#4451 Re-linking avoidance is too aggressive new normal 7.12.1 Compiler
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