O2 / HPC collision

This works,

$ ghc -O2 --make src/*.hs

And this works,

$ ghc -fhpc --make src/*.hs

However, it seems I cannot invite -O2 and -fhpc to the same party:

 $ ghc -O2 -fhpc --make src/*.hs
[ 1 of 17] Compiling ScaleFactor      ( src/ScaleFactor.hs, src/ScaleFactor.o )
[ 2 of 17] Compiling Values           ( src/Values.hs, src/Values.o )
[ 3 of 17] Compiling RealFunction     ( src/RealFunction.hs, src/RealFunction.o )
[ 4 of 17] Compiling MRI              ( src/MRI.hs, src/MRI.o )
[ 5 of 17] Compiling Point            ( src/Point.hs, src/Point.o )
[ 6 of 17] Compiling Misc             ( src/Misc.hs, src/Misc.o )
[ 7 of 17] Compiling Examples         ( src/Examples.hs, src/Examples.o )
[ 8 of 17] Compiling Face             ( src/Face.hs, src/Face.o )
[ 9 of 17] Compiling Cardinal         ( src/Cardinal.hs, src/Cardinal.o )
[10 of 17] Compiling Comparisons      ( src/Comparisons.hs, src/Comparisons.o )
[11 of 17] Compiling Assertions       ( src/Assertions.hs, src/Assertions.o )
[12 of 17] Compiling FunctionValues   ( src/FunctionValues.hs, src/FunctionValues.o )
[13 of 17] Compiling Tetrahedron      ( src/Tetrahedron.hs, src/Tetrahedron.o )
/tmp/ghc2452_0/ghc2452_0.s: Assembler messages:

/tmp/ghc2452_0/ghc2452_0.s:48147:0:
     Error: symbol `d2jn_info' is already defined

/tmp/ghc2452_0/ghc2452_0.s:48158:0:
     Error: symbol `d2jl_info' is already defined

/tmp/ghc2452_0/ghc2452_0.s:48169:0:
     Error: symbol `d2jh_info' is already defined

/tmp/ghc2452_0/ghc2452_0.s:48180:0:
     Error: symbol `d2jb_info' is already defined

...

Tested with both GHC 7.2.1 and GHC 7.2.2.

Trac metadata

Trac field	Value
Version	7.2.1
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler
Test case
Differential revisions
BlockedBy
Related
Blocking
CC
Operating system
Architecture