Hello, I want to add a field for collecting information about the number of GCs a particular heap object survived. I've done the following to implement this: - Add a field "StgWord gc_id" to struct "StgHeader" and "StgThunkHeader" - Update "SET_HDR" macro in "ClosureMacros.h" to update the "gc_id" - Update the "closureTypeHeaderSize" function in "Heap/ClosureTypes.hs" to account for that 1 extra word. Compilation leads to a segmentation fault. The stage 2 compiler is built. But usage of it leads to a segmentation fault. Build output: ``` chmod +x inplace/bin/ghc-stage2 "inplace/bin/ghc-stage2" -hisuf dyn_hi -osuf dyn_o -hcsuf dyn_hc -fPIC -dynamic -O0 -H64m -Wall -hide-all-packages -package-env - -i -iutils/check-api-annotations/. -iutils/check-api-annotations/dist-install/build -Iutils/check-api-annotations/dist-install/build -iutils/check-api-annotations/dist-install/build/check-api-annotations/autogen -Iutils/check-api-annotations/dist-install/build/check-api-annotations/autogen -optP-include -optPutils/check-api-annotations/dist-install/build/check-api-annotations/autogen/cabal_macros.h -package-id Cabal-3.2.1.0 -package-id base-4.14.3.0 -package-id containers-0.6.5.1 -package-id directory-1.3.6.0 -package-id ghc-8.10.7.20240224 -Wall -XHaskell2010 -no-user-package-db -rtsopts -Wnoncanonical-monad-instances -outputdir utils/check-api-annotations/dist-install/build -c utils/check-api-annotations/./Main.hs -o utils/check-api-annotations/dist-install/build/Main.dyn_o utils/check-api-annotations/ghc.mk:18: recipe for target 'utils/check-api-annotations/dist-install/build/Main.dyn_o' failed make[1]: *** [utils/check-api-annotations/dist-install/build/Main.dyn_o] Segmentation fault (core dumped) Makefile:123: recipe for target 'all' failed make: *** [all] Error 2 ``` Is there any other place I've missed follow-up modifications? I appreciate any help provided. Best, Adithya