#7033: stale .tix files can cause programs built with -fhpc to segfault
------------------------------+---------------------------------------------
Reporter: jwlato | Owner: andy@…
Type: bug | Status: new
Priority: normal | Component: Code Coverage
Version: 7.4.2 | Keywords:
Os: Unknown/Multiple | Architecture: Unknown/Multiple
Failure: Runtime crash | Testcase:
Blockedby: | Blocking:
Related: |
------------------------------+---------------------------------------------
In some circumstances, programs built with -fhpc will segfault when old
.tix files reference modules that no longer exist.
foo.hs
{{{
import Bar
main = print "Hello World"
}}}
Bar.hs
{{{
module Bar where
something = 1 :: Int
}}}
{{{
jwlato@compy:~/explorations$ ghc -O -fhpc foo.hs
[1 of 2] Compiling Bar ( Bar.hs, Bar.o )
[2 of 2] Compiling Main ( foo.hs, foo.o )
Linking foo ...
jwlato@compy:~/explorations$ ./foo
"Hello world"
jwlato@compy:~/explorations$ mv Bar.hs Bar.hs.orig
jwlato@compy:~/explorations$ sed -e 's/import/-- import/' -i.bak foo.hs
jwlato@compy:~/explorations$ rm *.hi; rm *.o
jwlato@compy:~/explorations$ ghc -O -fhpc foo.hs
[1 of 1] Compiling Main ( foo.hs, foo.o )
Linking foo ...
jwlato@compy:~/explorations$ ./foo
Segmentation fault
}}}
If "foo.hs" has a 'module Main where' declaration, instead of a segfault
the program exits with a message that 'foo.tix' should be deleted.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7033>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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