This concerns GHC HEAD (6.3) on 20 Jan 2005.
I'm afraid this is not going to be a very useful bug
report,
but I thought I'd file my observations anyway.
When compiling a file AFRPTestsReact.hs, GHC panics:
seshat-257% ghc -c -fglasgow-exts -package lang
-package concurrent -i../src AFRPTestsReact.hs
ghc-6.3: panic! (the `impossible' happened, GHC version
6.3):
Ix{Int}.index: Index (257) out of range ((0,118))
Please report it as a compiler bug to
glasgow-haskell-bugs@haskell.org,
or http://sourceforge.net/projects/ghc/.
I start to work on creating a small test case that will
exhibit
the bug by making a copy of the file under a different
name.
But when I compile that file, with the exact same
command line arguments, just to routinely ensure that I
can recreate the bug before I start modifying things,
everything works fine!
I compile the old file again, and again GHC panics, despite
the files being identical , living in the same
directory, being
compiled with the same command line arguments and
from the very same prompt (same environment variables).
I try a few times, and GHC consistently behaves as
described: old file => panic, any copy of the file =>
compiles fine.
Eventually, I "touch" the old file. And then it
compiles just fine!
Possibly some problem with reading file attributes???
Sorry that I cannot provide more info (e.g.
the exact time and date of the file): I'm no
longer able to recreate the problem.
/Henrik
e-mail: nhn@cs.nott.ac.uk
Trac metadata
| Trac field |
Value |
| Version |
6.4 |
| Type |
Bug |
| TypeOfFailure |
OtherFailure |
| Priority |
normal |
| Resolution |
ResolvedNoReason |
| Component |
Compiler |
| Test case |
|
| Differential revisions |
|
| BlockedBy |
|
| Related |
|
| Blocking |
|
| CC |
|
| Operating system |
|
| Architecture |
|
