The 7.10.2 release is a bugfix release, with over 40+ bug fixes from users and contributors. The major bugfixes relative to 7.10.1 are listed below.
A bug which caused GHC to generate bad DWARF unwinding information has been fixed (issue #10236).
A bug which caused GHC's libffi.so
library to be built with executable stacks on some
platforms has been fixed (issue #10208).
A bus error on SPARC machines caused by misaligned data accesses in the RTS has been fixed.
A type-system bug which could allow a user to write
unsafeCoerce
has been fixed (issue
#9858).
A bug which caused GHC to generate incorrect hyperlinks to documentation in Haddock has been fixed (#10206).
A bug in the typechecker which allowed erroneous programs
using Coercible
to typecheck has been
fixed (issue #10285).
An issue which could cause the "Call Arity" analysis to perform poorly in general has been fixed (issue #10293).
Several dozen bugs in the new API annotations work have been fixed (issues #10395, #10363, #10358, #10357, #10315, #10314, #10312, and many more).
A regression which could cause the typechecker fail to properly simplify type-level terms has been fixed (issue #10321).
A bug which caused programs compiled with
-flate-dmd-anal
to crash at runtime has
been fixed (issue #10288).
A bug which caused ARM/Linux binaries to be built with executable stacks has been fixed (issue #10369).
Several bugs in GHC's cross compilation support using LLVM have been fixed (#10275).
Several bugs in GHC's support for AArch64 have been fixed (such as issue #10264).
A bug which could cause GHC to generate incorrect code at runtime (generating an infinite loop exception) has been fixed (issue #10218).
Version number 4.8.1.0 (was 4.8.0.0)
The Lifetime
datatype (and its
constructors) are now exported from
GHC.Event
.
For issues dealing with language changes, please see the GHC 7.10 Migration Guide on the GHC wiki.
GHC's LLVM backend does not support LLVM 3.4 (issue #9929)
On Mac OS X, the -threaded
Garbage
Collector currently suffers from a large performance
penalty due to a lack of system-specific optimization
(issue #7602).
GHC's LLVM backend is currently incompatible with LLVM 3.4 (issue #9929).
GHCi fails to appropriately load
.dyn_o
files (issue #8736).
Not all cases of non-terminating type-level computation (with both
recursive type families and recursive newtypes) are caught. This
means that GHC might hang, but it should do so only when the program
is ill-typed (due to non-terminating type-level features). The bugs
are reported as #7788
and #10139.
There also remain certain obscure scenarios where the solver for
Coercible
instances is known to be still
incomplete. See comments in #10079.