Assembler error on ocaml.5

[icristescu]

On a ocaml-variants.5.0.0+trunk switch, when I run dune build ./test/repr/main.exe I get the following error:

✦ ❯ dune build ./test/repr/main.exe
File "test/repr/.main.eobjs/native/_unknown_", line 1, characters 0-0:
/var/folders/mj/sbh5f0s1783ch5vgxqp4j87h0000gn/T/build_762d24_dune/camlasm5ee54b.s:34489:17: error: expected compatible register, symbol or integer in range [0, 4095]
  add x16, x16, #4480
                ^
File "test/repr/main.ml", line 1:
Error: Assembler error, input left in file /var/folders/mj/sbh5f0s1783ch5vgxqp4j87h0000gn/T/build_762d24_dune/camlasm5ee54b.s

commenting out test_variants the error disappears. The code runs without issues on my ocaml.4.13.1 switch.

[samoht]

I can reproduce the error as well on my arm64 macOS. It's worth opening an issue on ocaml/ocaml!

[icristescu]

Done in ocaml/ocaml#11229.