#4860: Text.Regex crasher
------------------------+---------------------------------------------------
Reporter: batkins | Owner:
Type: bug | Status: new
Priority: normal | Component: libraries/base
Version: 7.0.1 | Keywords: regex crash
Testcase: | Blockedby:
Os: MacOS X | Blocking:
Architecture: x86 | Failure: Runtime crash
------------------------+---------------------------------------------------
I noticed that my Haskell program encountered a stack overflow when it
called Data.String.Utils.splitW. Investigating further, I saw the
following behavior.
In GHCI:
{{{
splitWs "foo bar"
<interactive>: memory allocation failed (requested 1581252608 bytes)
}}}
In splitWs's source code, it evaluates splitRegex (mkRegex "[
\t\n\r\v\f]+")
Evaluating this expression crashes GHCI:
{{{
*Main Text.Regex> splitRegex (mkRegex "[ \t\n\r\v\f]+") "foo bar"
}}}
Using the functions in Text.Regex, I tried:
{{{
splitRegex (mkRegex " ") "foo bar"
}}}
which correctly returns ["foo", "bar"]. The regex above seems to be the
problem.
Running the latest GHC (7.0.1) on OS X Snow Leopard. Note that the
original crash occurred in a compiled program - this is not GHCi only.
Here is the original crash in the compiled application:
{{{
Stack space overflow: current size 8388608 bytes.
Use `+RTS -Ksize -RTS' to increase it.
}}}
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4860>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
_______________________________________________
Glasgow-haskell-bugs mailing list
[email protected]
http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs
