compilation succeeded, but the on_load function failed on my macbook pro (Big Sur) with apple M1 chip

[zhangzhen]

How can I solve this issue?
Error messages printed on the console where livebook is started:

10:03:43.111 [warn] The on_load function for module Elixir.Explorer.PolarsBackend.Native returned:
{:error,
{:load_failed,
'Failed to load NIF library: 'dlopen(/Users/zhangzh/Library/Caches/mix/installs/elixir-1.12.3-erts-12.1/c8c0b2eb20455bd67cc55fc3c3acd0de/_build/prod/lib/explorer/priv/native/libexplorer.so, 2): no suitable image found. Did find:\n\t/Users/zhangzh/Library/Caches/mix/installs/elixir-1.12.3-erts-12.1/c8c0b2eb20455bd67cc55fc3c3acd0de/_build/prod/lib/explorer/priv/native/libexplorer.so: mach-o, but wrong architecture\n\t/Users/zhangzh/Library/Caches/mix/installs/elixir-1.12.3-erts-12.1/c8c0b2eb20455bd67cc55fc3c3acd0de/_build/prod/lib/explorer/priv/native/libexplorer.so: stat() failed with errno=35''}}

=========

➜  ~ file /Users/zhangzh/test/my_app/_build/dev/lib/explorer/priv/native/libexplorer.so
/Users/zhangzh/test/my_app/_build/dev/lib/explorer/priv/native/libexplorer.so: Mach-O 64-bit dynamically linked shared library x86_64

elixir: 1.12.3-otp-24
erlang: 24.1
rustc: 1.56.1 (59eed8a2a 2021-11-01)

[josevalim]

I assume you are using Apple M1 or similar? The error says that one of the libraries used by Explorer is x86_64, but it doesn't say which one. Given it is dynamically linked, it is most likely a system library. You could try to use otool to debug it:

$ otool -L /Users/zhangzh/test/my_app/_build/dev/lib/explorer/priv/native/libexplorer.so

Also try otool with no arguments to see other flags available.

[zhangzhen]

@josevalim re-installing rust solved this issue. Apple M1 macbook I'm using was transferred from my old Intel macbook.

[josevalim]

Fantastic!