ci: fix coverage feature

Author: dr-orlovsky

.github/workflows/codecov.yml

@@ -27,9 +27,9 @@ jobs:
       - uses: taiki-e/install-action@nextest
       - name: Collect coverage data (including doctests)
         run: |
-          RUSTFLAGS="--cfg=coverage_nightly" cargo +nightly llvm-cov --no-report nextest --workspace --all-features
-          RUSTFLAGS="--cfg=coverage_nightly" cargo +nightly llvm-cov --no-report --doc --workspace --all-features
-          RUSTFLAGS="--cfg=coverage_nightly" cargo +nightly llvm-cov report --doctests --lcov --output-path lcov.info
+          cargo +nightly llvm-cov --no-report nextest --workspace --all-features
+          cargo +nightly llvm-cov --no-report --doc --workspace --all-features
+          cargo +nightly llvm-cov report --doctests --lcov --output-path lcov.info
       - name: Upload coverage data to codecov
         uses: codecov/codecov-action@v4
         with:

commit_verify/src/lib.rs

@@ -37,6 +37,7 @@
     non_snake_case
 )]
 #![cfg_attr(docsrs, feature(doc_auto_cfg))]
+#![cfg_attr(coverage_nightly, feature(coverage_attribute))]
 
 //! Standard cryptographic commitment library, created and supported by the
 //! LNP/BP Labs.

single_use_seals/src/lib.rs

@@ -25,6 +25,7 @@
 
 #![deny(missing_docs)]
 #![cfg_attr(docsrs, feature(doc_auto_cfg))]
+#![cfg_attr(coverage_nightly, feature(coverage_attribute))]
 #![cfg_attr(not(feature = "strict_encoding"), no_std)]
 
 //! # Single-use-seals

src/lib.rs

@@ -34,6 +34,7 @@
     missing_docs
 )]
 #![cfg_attr(docsrs, feature(doc_auto_cfg))]
+#![cfg_attr(coverage_nightly, feature(coverage_attribute))]
 
 //! The LNP/BP client-side-validation foundation libraries implementing LNPBP
 //! specifications & standards (LNPBP-4, 7, 8, 9, 81).