Fix no_std for deps

.github/workflows/main.yml

@@ -50,9 +50,9 @@ jobs:
           matrix.rust == 'nightly'
         run: cargo test --test debugger_visualizer --features "url/serde,url/debugger_visualizer" -- --test-threads=1
       - name: Test `no_std` support
-        run: cargo test --no-default-features --features=alloc
+        run: cargo +nightly test --no-default-features --features=alloc
       - name: Build `aarch64-unknown-none` with `no_std`
-        run: cargo +nightly build -Zbuild-std=core,alloc --target aarch64-unknown-none -v --release
+        run: cargo +nightly build -Zbuild-std=core,alloc --target aarch64-unknown-none -v --release --no-default-features --features=alloc
 
   WASM:
     runs-on: ubuntu-latest

url/Cargo.toml

@@ -36,7 +36,7 @@ serde = {version = "1.0", optional = true, features = ["derive"]}
 [features]
 default = ["std"]
 std = ["idna/std", "percent-encoding/std", "form_urlencoded/std", "alloc"]
-alloc = []
+alloc = ["idna/alloc", "percent-encoding/alloc", "form_urlencoded/alloc"]
 # UNSTABLE FEATURES (requires Rust nightly)
 # Enable to use the #[debugger_visualizer] attribute.
 debugger_visualizer = []

url/src/lib.rs

@@ -2966,6 +2966,7 @@ fn file_url_segments_to_pathbuf(
     host: Option<&str>,
     segments: str::Split<'_, char>,
 ) -> Result<PathBuf, ()> {
+    use alloc::vec::Vec;
     use percent_encoding::percent_decode;
     use std::ffi::OsStr;
     #[cfg(any(unix, target_os = "redox"))]