32 bit Haddock runs out of memory compiling 32 bit GHC

Final parts of stage2 fails with

Warning: DriverBkp: could not find link destinations for:
    BkpEnv BkpM backpackProgressMsg
haddock.exe: Out of memory

make[1]: *** [compiler/ghc.mk:448: compiler/stage2/doc/html/ghc/ghc.haddock] Error 251
make: *** [Makefile:127: all] Error 2

Trac metadata

Trac field	Value
Version	8.4.3
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler
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