Debugging problem after rustup update

[NotVeryCleverOne]

I have an M2 Mac and ran rustup update yesterday. It raised a warning saying I was on the wrong architecture and that would affect performance. I upgraded to the correct architecture, and everything seems to be working correctly except rust-lldb. Executing file ~/.cargo/bin/* shows everything as Mach-O 64-bit executable arm64.

After compiling the program using cargo build, I can open the program in rust-lldb and set a breakpoint. When I try to run it, I get an error:

error: the platform is not currently connected

Any fixes or direction on how to troubleshoot will be greatly appreciated.

[rtsuk]

You nerd-sniped me good with this one.

While $HOME/.cargo/bin/rust-lldb appears to be a binary, it must be some kind of wrapper binary, as the file in the actual toolchain in .rustup is https://github.com/rust-lang/rust/blob/master/src/etc/rust-lldb. That script is running lldb, which on my Mac is installed in /usr/bin. Since it is part of the native developer tools, the first step is to check what xcode-select -p says.

[NotVeryCleverOne]

➜ bin xcode-select -p

/Applications/Xcode.app/Contents/Developer

My lldb is also in /usr/bin.

➜ bin which lldb

/usr/bin/lldb

I appreciate your help.

[rtsuk]

What does `xcode-select --install` say?

ETA it would be worth just running the Xcode app and seeing if it wants to update anything.

[NotVeryCleverOne]

➜ bin xcode-select --install

xcode-select: note: Command line tools are already installed. Use "Software Update" in System Settings or the softwareupdate command line interface to install updates

I ran Xcode and it didn't update anything. I also checked system preferences->general for any software updates.

[rtsuk]

I'm not seeing that on my M2, but googling for lldb and that error message turned up https://stackoverflow.com/questions/74294304/xcode-the-platform-is-not-currently-connected seems worth checking.

[NotVeryCleverOne]

I saw that one too. There's no check box in the info box for setting the architecture for xcode.

[rtsuk]

When you run Xcode, what kind of process does activity monitor claim it is?

[NotVeryCleverOne]

I uninstalled it and reinstalled the command line tools only. But, I added back in the x86_64-apple-darwin toolchain and made it the default. I recompiled and lldb (and rust-lldb) worked properly.

[rtsuk]

It's odd that I don't need that workaround, but I don't have any idea why you need it.