Lazy I/O and asynchronous exceptions don't mix well
This program:
import Control.Concurrent
import Control.Exception
main = do
s <- getContents
t <- forkIO $ evaluate (length s) >> return ()
threadDelay 1000
killThread t
print (length s)
results in
$ ./async
async: thread killed
when really it should just wait for input.
The problem is #2558 (closed), but since I'm not sure that #2558 (closed) has a general solution (see comments on that ticket) I thought I'd open a ticket for this specific case. It's amazing nobody has complained about this before.
Trac metadata
Trac field | Value |
---|---|
Version | 6.12.1 |
Type | Bug |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | libraries/base |
Test case | |
Differential revisions | |
BlockedBy | |
Related | |
Blocking | |
CC | |
Operating system | |
Architecture |