Enable branch coverage

Justfile

@@ -19,14 +19,23 @@ udeps:
 
 # Run all tests with nextest and cargo-llvm-cov
 ci-test:
-	#!/bin/bash -eux
-	source <(cargo llvm-cov show-env --export-prefix)
-	cargo llvm-cov clean --workspace
-
-	export RUST_LOG=trace
-	cargo nextest run --release --all-features --profile ci
-	export ONE_BYTE_READ=1
-	cargo nextest run --release --all-features --profile ci
-
-	cargo llvm-cov report --release --ignore-filename-regex 'corpus/mod\.rs$' --lcov --output-path coverage.lcov
-	cargo llvm-cov report --release --ignore-filename-regex 'corpus/mod\.rs$' --html
+    #!/bin/bash -eux
+    export RUSTUP_TOOLCHAIN=nightly
+    rustup component add llvm-tools
+    cargo llvm-cov --version
+
+    cargo llvm-cov show-env --branch --export-prefix > /tmp/llvm-cov-env
+    echo "======= LLVM cov env ======="
+    cat /tmp/llvm-cov-env
+    echo "============================"
+    source /tmp/llvm-cov-env
+
+    cargo llvm-cov clean --workspace
+
+    export RUST_LOG=trace
+    cargo nextest run --release --all-features --profile ci
+    export ONE_BYTE_READ=1
+    cargo nextest run --release --all-features --profile ci
+
+    cargo llvm-cov report --release --ignore-filename-regex 'corpus/mod\.rs$' --lcov --output-path coverage.lcov
+    cargo llvm-cov report --release --ignore-filename-regex 'corpus/mod\.rs$' --html

flake.nix

@@ -50,10 +50,6 @@
         version = "latest";
         strictDeps = true;
         dontStrip = true;
-        # workaround for https://github.com/NixOS/nixpkgs/issues/166205
-        env = with pkgs; lib.optionalAttrs stdenv.cc.isClang {
-          NIX_LDFLAGS = "-l${stdenv.cc.libcxx.cxxabi.libName}";
-        };
         inherit src buildInputs nativeBuildInputs;
       };
       cargoArtifacts = craneLib.buildDepsOnly commonArgs;
@@ -68,8 +64,7 @@
         default = bin;
       };
       devShells.default = mkShell {
-        inputsFrom = [ bin ];
-        packages = with pkgs; [ just nixpkgs-fmt ];
+        packages = with pkgs; [ just nixpkgs-fmt mold libiconv ];
       };
     }
     );

rust-toolchain.toml

@@ -1,3 +1,3 @@
 [toolchain]
-channel = "stable"
+channel = "1.77.0"
 components = ["llvm-tools", "clippy", "rust-src"]