fix: stm32h7rs usb_refck panic message now compiles

[friedman-ionq]

With the following in Cargo.toml:

embassy_stm32 = {"0.2", features = [   "memory-x",
    "stm32h7s3l8",
    "defmt",
    "time-driver-any",
    "exti",
    "unstable-pac",
] }

the crate would not compile. This fixes the issue.

[Dirbaio]

Could you add this feature combination to ci.sh so it'd have been caught? thanks!

[friedman-ionq]

Could you add this feature combination to ci.sh so it'd have been caught? thanks!

Sure. Turns out the minimum repeatable feature is just "stm32h7s3l8". Which is surprising, because there already is a test case. Digging deeper.

[Dirbaio]

maybe it's due to defmt. When it's enabled the panic! macro is overridden, so maybe it works with and fails without.

[friedman-ionq]

maybe it's due to defmt. When it's enabled the panic! macro is overridden, so maybe it works with and fails without.

$ ./ci.sh
thread 'main' panicked at src/bin/cargo-batch.rs:136:85:
called `Result::unwrap()` on an `Err` value: the package 'embassy-stm32-tests' does not contain this feature: defmt
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

[Dirbaio]

the embassy-stm32-tests crate doesn't have it, embassy-stm32 does.

[friedman-ionq]

the embassy-stm32-tests crate doesn't have it, embassy-stm32 does.

``~/work/embassy (main)$ git diff
diff --git a/ci.sh b/ci.sh
index e32105b16..46354f096 100755
--- a/ci.sh
+++ b/ci.sh
@@ -169,6 +169,7 @@ cargo batch
--- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv6m-none-eabi --features stm32u031r8,defmt,exti,time-driver-any,time
--- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv6m-none-eabi --features stm32u073mb,defmt,exti,time-driver-any,time
--- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv6m-none-eabi --features stm32u083rc,defmt,exti,time-driver-any,time \

• --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv7em-none-eabihf --features stm32h7s3l8,defmt,time-driver-any,exti,unstable-pac
  --- build --release --manifest-path embassy-nxp/Cargo.toml --target thumbv8m.main-none-eabihf
  --- build --release --manifest-path cyw43/Cargo.toml --target thumbv6m-none-eabi --features ''
  --- build --release --manifest-path cyw43/Cargo.toml --target thumbv6m-none-eabi --features 'log' \

does not repro the bug when I execute `./ci.sh` on main.