Compiled program crashes
I have a program which compiles fine, but the resulting executable crashes. First the steps to reproduce:
git clone git@github.com:waldheinz/bling.git
git checkout e2bad3ca6be2409386d28796997709318cf6ff64
cabal configure
cabal build
./dist/build/bling/bling examples/cornell-box-underwater.blingThis will result in either a segfault or produce an "internal error" message, at least for me and two other who tried it as well. The error message is
bling: internal error: scavenge_one: strange object -1083673327
(GHC version 7.7.20120823 for x86_64_unknown_linux)The "strange object" varies. Some random observations which might be useful:
- this happens with GHC 7.4.1 and a fresh compile of HEAD (GHC version 7.7.20120823)
- I sanitized the code to be completely free of unsafe* function calls. Before, there was quite some unsafe array reading/writing using the vector package. This did not change anything, but the revision above reflects this "safe" state, just in case...
- the problem first occured when I change the SPPM.mkHash function to use the Utils.GrowVec type instead of lists for it's intermediate results. [1] GrowVec is basically a wrapper around a vector which doubles the size when space is exhausted.
- the optimization level does not seem to affect the problem (it occurs even with -O0 and everything else removed)
Running under GDB gives this stack trace:
#1 0x00000031d12370d8 in abort () from /lib64/libc.so.6
#2 0x0000000000cb4765 in rtsFatalInternalErrorFn ()
#3 0x0000000000cb48dd in barf ()
#4 0x0000000000cd30e9 in scavenge_one ()
#5 0x0000000000cd3645 in scavenge_mutable_list ()
#6 0x0000000000cd3835 in scavenge_capability_mut_lists ()
#7 0x0000000000cb98bc in GarbageCollect ()
#8 0x0000000000cac043 in scheduleDoGC.isra.20 ()
#9 0x0000000000cacabf in scheduleWaitThread ()
#10 0x0000000000cb683e in real_main ()
#11 0x0000000000cb693a in hs_main ()
#12 0x0000000000407003 in main ()I'm currently trying to debug this further, but my abilities on this front are limited...
Trac metadata
| Trac field | Value |
|---|---|
| Version | 7.4.1 |
| Type | Bug |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | Compiler |
| Test case | |
| Differential revisions | |
| BlockedBy | |
| Related | |
| Blocking | |
| CC | |
| Operating system | |
| Architecture |