Bug "<interactive>: internal error: interpretBCO: unknown or unimplemented opcode"s

[Matthew Sackman]

Hi,

Please find code attached. Please CC me on replies as I'm not
subscribed. I would have added this via trac but couldn't log in (was
endlessly prompted for username/password and guest/guest didn't make it
go away).

This is to do with strictness modifiers: if you remove all the ! from
the code then the bug vanishes.

Also, the following works fine:

buildOctTree (Vec 0 0 0) 10 10 10 [(a,(Vec a a a)) | a <- [(-4.0),(-2.0)..4.0]]

Also, having done that, the problematic expressions work fine - the bug
only appears if the expression below is run as the first call to
buildOctTree in the ghci session.

This is on a P4, 2GB RAM, Debian unstable, ghc 6.6 (both hand rolled and
from debian).

uname -a =
   Linux smudge 2.6.18-2-686 #1 SMP Wed Nov 8 19:52:12 UTC 2006 i686 GNU/Linux

> ghci -v OctTree
   ___         ___ _
  / _ \ /\  /\/ __(_)
 / /_\// /_/ / /  | |      GHC Interactive, version 6.6, for Haskell 98.
/ /_\\/ __  / /___| |      http://www.haskell.org/ghc/
\____/\/ /_/\____/|_|      Type :? for help.

Using package config file: /usr/lib/ghc-6.6/package.conf
wired-in package base mapped to base-2.0
wired-in package rts mapped to rts-1.0
wired-in package haskell98 mapped to haskell98-1.0
wired-in package template-haskell mapped to template-haskell-2.0
Hsc static flags: -static
Loading package base ... linking ... done.
*** Parser:
*** Desugar:
*** Simplify:
*** CorePrep:
*** ByteCodeGen:
*** Parser:
*** Desugar:
*** Simplify:
*** CorePrep:
*** ByteCodeGen:
*** Chasing dependencies:
Stable obj: []
Stable BCO: []
unload: retaining objs []
unload: retaining bcos []
Upsweep completely successful.
*** Deleting temp files:
Deleting: 
*** Chasing dependencies:
Stable obj: []
Stable BCO: []
unload: retaining objs []
unload: retaining bcos []
compile: input file OctTree.hs
*** Checking old interface for main:OctTree:
[1 of 1] Compiling OctTree          ( OctTree.hs, interpreted )
*** Parser:
*** Renamer/typechecker:
*** Desugar:
    Result size = 1587
*** Simplify:
    Result size = 2390
    Result size = 2137
    Result size = 2105
    Result size = 2100
*** Tidy Core:
    Result size = 2198
*** CorePrep:
    Result size = 2646
*** ByteCodeGen:
*** Deleting temp files:
Deleting: 
Upsweep completely successful.
*** Deleting temp files:
Deleting: 
Ok, modules loaded: OctTree.
*OctTree> buildOctTree (Vec 0 0 0) 10 10 10 [(a,(Vec a a a)) | a <- [(-4.0),(-3.9)..4.0]]
*** Parser:
*** Desugar:
*** Simplify:
*** CorePrep:
*** ByteCodeGen:
<interactive>: internal error: interpretBCO: unknown or unimplemented opcode 20196
    (GHC version 6.6 for i386_unknown_linux)
    Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug
Aborted

Matthew
-- 
Matthew Sackman
http://www.wellquite.org/
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