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threaded1 = -threaded -debug
threaded2 = -O -threaded, and +RTS -N2 -RTS at runtime

The new story on higher-rank types requires a few functions to be
eta-expanded.  And the new scoped-type-variable story also forces
a few changes.

Test tryPutMVar on empty MVars too

Add a fast version of the testsuite

The idea is to have a way to run as much of the testsuite as possible
in a short time, so that we'll run it more often (such as just before
checking in a change, for example).  'make fast' tries for good
coverage without using too many cycles.  Currently it takes about 4
minutes on a fast machine with an optimised GHC build; I think this
might still be a little on the slow side.

When you say 'make fast' in testsuite/tests/ghc-regress, we run each
test only one way, and all of the long-running tests are omitted.
Also, to get the runtime down further, I arbitrarily omitted many of
the should_run tests (because these tend to take a lot longer than
should_compile or should_fail tests).  I tried to keep a
representative few in each category.

Add test for data con in class sig

Add test from ticket #488

add test from ticket #441

accept output

comment update

recode this file in UTF-8 from Latin-1

accept output (improved lexer error messages)

Add test case that causes a core-lint failure (cut down from
Encoding.hs in HEAD).

add a cmm lint failure

Add -dcmm-lint when compiling

Unicode source tests

Add another synonym-performance test (but comment it out of the test file; too slow!)