GhcEnableTablesNextToCode=NO breaks NCG on macOS

It appears as if GhcEnableTablesNextToCode=NO breaks the NCG on macOS as early as GHC 8.4.

Running the following

git reset --hard HEAD
git clean -xfd
git submodule update --init --recursive
git clean -xfd
sed -E "s/^#BuildFlavour[ ]+= quick-cross$/BuildFlavour = quick/" < mk/build.mk.sample > mk/build.mk
echo "GhcEnableTablesNextToCode=NO" >> mk/build.mk
./boot && ./configure --silent && make -s -j9

on macOS with the 8.4 and 8.6 generated duplicate symbols in the assembly file.

Something like

.text
.align 3
Lc4l:
Lc4l:
        jmp Lc4u
.const_data
.align 3
.align 0
_Lc4l_info:
        .quad   Lc4l
        .quad   259
        .long   30
        .long   0

which causes the assembler to choke.

Trac metadata

Trac field	Value
Version	8.6.3
Type	Bug
TypeOfFailure	OtherFailure
Priority	high
Resolution	Unresolved
Component	Compiler (CodeGen)
Test case
Differential revisions
BlockedBy
Related
Blocking
CC	bgamari, carter, terrorjack
Operating system
Architecture