fix: Ensure stack does not overflow on Windows

.github/workflows/rust.yml

@@ -12,12 +12,21 @@ env:
 
 jobs:
   build:
-
     runs-on: ubuntu-latest
-
     steps:
     - uses: actions/checkout@v3
     - name: Build
       run: cargo build --verbose
     - name: Run tests
       run: cargo test --verbose
+
+  stack_overflow_tests:
+    runs-on: windows-latest
+    steps:
+    - uses: actions/checkout@v3
+    - name: Install Rust Nightly
+      run: rustup toolchain install nightly
+    - name: Build
+      run: cargo build
+    - name: Run tests
+      run: cargo test --test run_stack_overflow_tests -- --include-ignored --test-threads=1

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "skyscraper"
-version = "0.6.0"
+version = "0.6.1-beta.0"
 authors = ["James La Novara-Gsell <james.lanovara.gsell@gmail.com>"]
 edition = "2021"
 description = "XPath for HTML web scraping"

src/xpath/grammar/expressions/sequence_expressions/constructing_sequences.rs

@@ -25,17 +25,17 @@ pub fn range_expr(input: &str) -> Res<&str, RangeExpr> {
         (
             next_input,
             RangeExpr {
-                expr: res.0,
-                to_expr: res.1.map(|res| res.1),
+                expr: Box::new(res.0),
+                to_expr: res.1.map(|res| Box::new(res.1)),
             },
         )
     })
 }
 
 #[derive(PartialEq, Debug, Clone)]
 pub struct RangeExpr {
-    pub expr: AdditiveExpr,
-    pub to_expr: Option<AdditiveExpr>,
+    pub expr: Box<AdditiveExpr>,
+    pub to_expr: Option<Box<AdditiveExpr>>,
 }
 
 impl Display for RangeExpr {

tests/stack_overflow_tests/README.md

@@ -5,7 +5,7 @@ The structs in this library are large enough that the recursive parsing of XPath
 This has only ever been reproduced on Windows 10 and only when building a binary in debug mode.
 Notably, this cannot be reproduced using an actual test, thus this mini project was created.
 
-This project is run automatically during a `cargo test` of the main project by way of `run_stack_overflow_tests.rs`.
+This project is tested by the main project by way of `tests/run_stack_overflow_tests.rs`.
 
 A typical failure of this tests appears as follows: