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| author | simonpj@microsoft.com <unknown> | 2009-09-08 13:14:00 +0000 |
|---|---|---|
| committer | simonpj@microsoft.com <unknown> | 2009-09-08 13:14:00 +0000 |
| commit | 8a25c54e2df36b3fb40436e5b887dddc3c64ab54 (patch) | |
| tree | a1b9385e06400e218667b09ddc1c93568446c7c4 /compiler/parser/HaddockUtils.hs | |
| parent | a0d2e0fb1a6b717ad5ecf7bfaa208863af4378ab (diff) | |
| download | haskell-8a25c54e2df36b3fb40436e5b887dddc3c64ab54.tar.gz | |
Fix Trac #3403: interaction of CPR and pattern-match failure
A fine bug report (#3403) demonstrated that we were losing the tail
call property when a complicated pattern match was involved. After
a bit of investigation I discovered that the culprit was the failure
join-point introduced by the pattern matcher. It was a zero-argument
thunk, which is not very CPR-friendly, and that interacted badly with
CPR worker/wrapper.
It's easy to fix, the same way that we fix other join points, by supplying
a dummy argument (that is not really passed at runtime.
Diffstat (limited to 'compiler/parser/HaddockUtils.hs')
0 files changed, 0 insertions, 0 deletions