Bugs
Simon Marlow
simonmar@microsoft.com
Wed, 11 Sep 2002 11:07:19 +0100
Hugs folk,
I thought I'd run the latest Hugs against some of the GHC tests, in
particular to test the module system since it's received some attention
recently. I've found a few bugs... all these test cases can be found
under fptools/testsuite/rename.
1. Hiding constructors doesn't work properly. See rename/prog002, which
should fail to compile.
2. Pattern bindings which bind no variables are erroneously disallowed
(rename/should_compile/rn003).
3. some problem with qualified imports (rename/should_compile/rn026 and
rename/should_compile/rn027).
4. defining a variable which clashes with an import is ok as long as the
variable is never referred to. Hugs disallows it.
(rename/should_compile/rn029).
5. some problem with empty declaration lists
(rename/should_compile/rn034).
6. infix declarations are legal inside a class declaration
(rename/should_compile/rn035).
7. precedence parsing with unary negation is wrong.
(rename/should_fail/rnfail017.hs).
8. it appears that extra qualified names are being brough into scope
(rename/should_fail/rnfail030.hs and rnfail031.hs).
9. hiding doesn't work with qualified imports
(rename/should_fail/rnfail032.hs and rnfail033.hs).
10. naming a constructor in an export list is illegal.
(rename/should_fail/rnfail035.hs).
We really ought to think about merging our test suites at some point;
the stuff in fptools/testsuite is supposed to be largely
compiler-independednt, but it will need some work to make it go through
with Hugs.
Cheers,
Simon