called `Result::unwrap()` on an `Err` value: failed while formatting fluent string `codegen_ssa_unable_to_run_dsymutil`

[glandium]

When building a binary for mac and dsymutil is not in $PATH for whatever reason, this is the message that appears, followed by a backtrace, instead of the intended error:

thread 'rustc' panicked at compiler/rustc_errors/src/emitter.rs:1289:80:
called `Result::unwrap()` on an `Err` value: failed while formatting fluent string `codegen_ssa_unable_to_run_dsymutil`: 
the attribute `note` was missing
help: add `.note = <message>`

Indeed there is no note in the fluent file.

rust/compiler/rustc_codegen_ssa/messages.ftl

Lines 314 to 315 in 3a36386

	codegen_ssa_unable_to_run_dsymutil = unable to run `dsymutil`: {$error}

while one is expected from the error declaration.

rust/compiler/rustc_codegen_ssa/src/errors.rs

Lines 432 to 434 in 3a36386

	#[derive(Diagnostic)]
	#[diag(codegen_ssa_unable_to_run_dsymutil)]
	#[note]