diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
index 427795144c..021d02b14e 100644
--- a/.github/workflows/docs.yml
+++ b/.github/workflows/docs.yml
@@ -21,7 +21,7 @@ jobs:
         run: touch target/doc/.nojekyll
       - name: Set short sha output
         id: short_sha
-        run: echo "::set-output name=sha::$(git rev-parse --short HEAD)"
+        run: echo ":name=sha::$(git rev-parse --short HEAD)" >> $GITHUB_OUTPUT
       - name: Checkout gh-pages
         uses: actions/checkout@v3
         with:
diff --git a/.github/workflows/hyperfine.yml b/.github/workflows/hyperfine.yml
index e6b627463b..af3a80735c 100644
--- a/.github/workflows/hyperfine.yml
+++ b/.github/workflows/hyperfine.yml
@@ -31,7 +31,7 @@ jobs:
         uses: actions/cache@v3
         id: cache
         with:
-          path: ${{ matrix.branch }}_programs/*.json
+          path: ${{ matrix.branch }}_programs/*.json
           key: benchmarks-${{ matrix.branch }}-${{ hashFiles( 'cairo_programs/benchmarks/*.cairo' ) }}
           restore-keys: benchmarks-${{ matrix.branch }}-
 
diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index 2ed548b405..2f3109af40 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -1,4 +1,4 @@
-name: rust
+name: QA
 
 on:
   merge_group:
@@ -11,80 +11,360 @@ env:
   CARGO_TERM_COLOR: always
 
 jobs:
-  build:
-    runs-on: ubuntu-20.04
+  build-programs:
+    strategy:
+      matrix:
+        # NOTE: we build cairo_proof_programs so clippy can check the benchmarks too
+        program-target: [ cairo_bench_programs, cairo_proof_programs, cairo_test_programs ]
+    name: Build Cairo programs
+    runs-on: ubuntu-22.04
     steps:
-    - name: Install Rust 1.66.1
-      uses: actions-rs/toolchain@v1
+    - name: Checkout
+      uses: actions/checkout@v3
+
+    - name: Fetch from cache
+      uses: actions/cache@v3
+      id: cache-programs
       with:
-          toolchain: 1.66.1
-          override: true
-          components: rustfmt, clippy
+        path: cairo_programs/**/*.json
+        key: ${{ matrix.program-target }}-cache-${{ hashFiles( 'cairo_programs/**/*.cairo' ) }}
+        restore-keys: ${{ matrix.program-target }}-cache-
+
     - name: Python3 Build
+      if: ${{ steps.cache-programs.outputs.cache-hit != 'true' }}
       uses: actions/setup-python@v4
       with:
         python-version: '3.9'
+        cache: 'pip'
+    - name: Install cairo-lang and deps
+      if: ${{ steps.cache-programs.outputs.cache-hit != 'true' }}
+      run: pip install -r requirements.txt
+
+    - name: Build programs
+      if: ${{ steps.cache-programs.outputs.cache-hit != 'true' }}
+      run: make -j ${{ matrix.program-target }}
 
-    - name: Install Nextest
-      uses: taiki-e/install-action@nextest
-    - name: Install cargo-llvm-cov
-      uses: taiki-e/install-action@cargo-llvm-cov
-    - name: Install wasm-bindgen-cli
-      uses: jetli/wasm-pack-action@v0.4.0
-      with:
-        version: "v0.10.3"
 
+  lint:
+    needs: build-programs
+    name: Run Lints
+    runs-on: ubuntu-22.04
+    steps:
+    - name: Install Rust 1.69.0
+      uses: dtolnay/rust-toolchain@1.69.0
+      with:
+          components: rustfmt, clippy
     - name: Set up cargo cache
       uses: Swatinem/rust-cache@v2
     - name: Checkout
       uses: actions/checkout@v3
-      with:
-        fetch-depth: 0 
-    - name: Install test dependencies
-      run: pip install -r requirements.txt
+
     - name: Format
       run: cargo fmt --all -- --check
+
+    - name: Fetch test programs
+      uses: actions/cache/restore@v3
+      with:
+        path: cairo_programs/**/*.json
+        key: cairo_test_programs-cache-${{ hashFiles( 'cairo_programs/**/*.cairo' ) }}
+    - name: Fetch proof programs
+      uses: actions/cache/restore@v3
+      with:
+        path: cairo_programs/**/*.json
+        key: cairo_proof_programs-cache-${{ hashFiles( 'cairo_programs/**/*.cairo' ) }}
+    - name: Fetch bench programs
+      uses: actions/cache/restore@v3
+      with:
+        path: cairo_programs/**/*.json
+        key: cairo_bench_programs-cache-${{ hashFiles( 'cairo_programs/**/*.cairo' ) }}
+    - name: Run clippy
+      run: make clippy
+
+
+  # NOTE: the term "smoke test" comes from electronics design: the minimal
+  # expectations anyone has in their device is to not catch fire on boot.
+  smoke:
+    needs: build-programs
+    name: Make sure all builds work
+    runs-on: ubuntu-22.04
+    steps:
+    - name: Install Rust 1.69.0
+      uses: dtolnay/rust-toolchain@1.69.0
+    - name: Set up cargo cache
+      uses: Swatinem/rust-cache@v2
+    - name: Install cargo-all-features
+      uses: taiki-e/install-action@v2
+      with:
+        tool: cargo-all-features
+    - name: Checkout
+      uses: actions/checkout@v3
+
+    - name: Fetch test programs
+      uses: actions/cache/restore@v3
+      with:
+        path: cairo_programs/**/*.json
+        key: cairo_test_programs-cache-${{ hashFiles( 'cairo_programs/**/*.cairo' ) }}
+    - name: Fetch proof programs
+      uses: actions/cache/restore@v3
+      with:
+        path: cairo_programs/**/*.json
+        key: cairo_proof_programs-cache-${{ hashFiles( 'cairo_programs/**/*.cairo' ) }}
+    - name: Fetch bench programs
+      uses: actions/cache/restore@v3
+      with:
+        path: cairo_programs/**/*.json
+        key: cairo_bench_programs-cache-${{ hashFiles( 'cairo_programs/**/*.cairo' ) }}
+
+    - name: Check
+      run: cargo check-all-features --workspace --all-targets
+
+
+  tests:
+    needs: build-programs
+    strategy:
+      fail-fast: false
+      matrix:
+        target: [ test, test-no_std, test-wasm ]
+        # TODO: features
+    name: Run tests
+    runs-on: ubuntu-22.04
+    steps:
+    - name: Install Rust 1.69.0
+      uses: dtolnay/rust-toolchain@1.69.0
+      with:
+          components: llvm-tools-preview
+    - name: Set up cargo cache
+      uses: Swatinem/rust-cache@v2
+    - name: Checkout
+      uses: actions/checkout@v3
+      with:
+        depth: 0
+    # This is not pretty, but we need `make` to see the compiled programs are
+    # actually newer than the sources, otherwise it will try to rebuild them
+    - name: Restore timestamps
+      uses: chetan/git-restore-mtime-action@v1
+
+    - name: Fetch test programs
+      uses: actions/cache/restore@v3
+      with:
+        path: cairo_programs/**/*.json
+        key: cairo_test_programs-cache-${{ hashFiles( 'cairo_programs/**/*.cairo' ) }}
+    - name: Fetch proof programs
+      uses: actions/cache/restore@v3
+      with:
+        path: cairo_programs/**/*.json
+        key: cairo_proof_programs-cache-${{ hashFiles( 'cairo_programs/**/*.cairo' ) }}
+
+    - name: Install testing tools
+      uses: taiki-e/install-action@v2
+      with:
+        tool: cargo-nextest,cargo-llvm-cov,wasm-pack
+    - name: Run
+      run:
+        # FIXME: we need to update the Makefile to do this correctly
+        case ${{ matrix.target }} in
+        'test')
+          cargo llvm-cov nextest --lcov --output-path lcov-${{ matrix.target }}.info --workspace --features test_utils
+          ;;
+        'test-no_std')
+          cargo llvm-cov nextest --lcov --output-path lcov-${{ matrix.target }}.info --workspace --features test_utils --no-default-features
+          ;;
+        'test-wasm')
+          wasm-pack test --node --no-default-features
+          ;;
+        esac
+
+    - name: Save coverage
+      if: matrix.target != 'test-wasm'
+      uses: actions/cache/save@v3
+      with:
+        path: lcov-${{ matrix.target }}.info
+        key: codecov-cache-${{ matrix.target }}-${{ github.sha }}
+
+
+  build-release:
+    name: Build release binary for comparisons
+    runs-on: ubuntu-22.04
+    steps:
+    - name: Install Rust 1.69.0
+      uses: dtolnay/rust-toolchain@1.69.0
+    - name: Set up cargo cache
+      uses: Swatinem/rust-cache@v2
+    - name: Checkout
+      uses: actions/checkout@v3
     - name: Build
-      run: make build
-    - name: Populate cache
+      run: cargo b --release -p cairo-vm-cli
+    # We don't read from cache because it should always miss
+    - name: Store in cache
+      uses: actions/cache/save@v3
+      with:
+        key: cli-bin-rel-${{ github.sha }}
+        path: target/release/cairo-vm-cli
+
+
+  run-cairo-reference:
+    strategy:
+      matrix:
+        include:
+        - program-target: cairo_proof_programs
+          programs-dir: cairo_programs/proof_programs
+          nprocs: 1
+          extra-args: '--proof_mode'
+        - program-target: cairo_test_programs
+          programs-dir: cairo_programs
+          nprocs: 2
+          extra-args: ''
+    name: Compute memory and execution traces with cairo-lang
+    needs: build-programs
+    runs-on: ubuntu-22.04
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v3
+
+    - name: Check cache
       uses: actions/cache@v3
-      id: cache-cairo-programs
+      id: trace-cache
       with:
         path: |
-          cairo_programs/*.json
-          cairo_programs/*.memory
-          cairo_programs/*.trace
-          !cairo_programs/*.rs.*
-          cairo_programs/*/*.json
-          cairo_programs/*/*.memory
-          cairo_programs/*/*.trace
-          !cairo_programs/*/*.rs.*
-        key: cairo-cache-${{ hashFiles( 'cairo_programs/*.cairo', 'cairo_programs/*/*.cairo' ) }}
-        restore-keys: cairo-cache-
-    - name: Restore timestamps
-      uses: chetan/git-restore-mtime-action@v1
-    - name: Install dependencies
+          cairo_programs/**/*.memory
+          cairo_programs/**/*.trace
+        key: ${{ matrix.program-target }}-reference-trace-cache-${{ hashFiles( 'cairo_programs/**/*.cairo' ) }}
+
+    - name: Python3 Build
+      if: steps.trace-cache.outputs.cache-hit != 'true'
+      uses: actions/setup-python@v4
+      with:
+        python-version: '3.9'
+        cache: 'pip'
+    - name: Install cairo-lang and deps
+      if: steps.trace-cache.outputs.cache-hit != 'true'
       run: pip install -r requirements.txt
-    - name: Run tests
-      run: make -j test
-    - name: Run tests no_std
-      run: make -j test-no_std
-    - name: Run wasm tests
-      run: make -j test-wasm
-    - name: Compare trace and memory
-      run: make -j compare_trace_memory
-    - name: Compare trace and memory with proof mode
-      run: make -j compare_trace_memory_proof
-    - name: Run clippy
-      run: make clippy
-    - name: Coverage
-      run: make coverage
+
+    - name: Fetch programs
+      if: ${{ steps.trace-cache.outputs.cache-hit != 'true' }}
+      uses: actions/cache/restore@v3
+      with:
+        path: cairo_programs/**/*.json
+        key: ${{ matrix.program-target }}-cache-${{ hashFiles( 'cairo_programs/**/*.cairo' ) }}
+        fail-on-cache-miss: true
+
+    - name: Generate traces
+      if: ${{ steps.trace-cache.outputs.cache-hit != 'true' }}
+      run: |
+        ls ${{ matrix.programs-dir }}/*.json | cut -f1 -d'.' | \
+        xargs -P ${{ matrix.nprocs }} -I '{program}' \
+        cairo-run --program '{program}'.json --layout starknet_with_keccak \
+        --memory_file '{program}'.memory --trace_file '{program}'.trace \
+        ${{ matrix.extra-args }}
+
+
+  run-cairo-release:
+    strategy:
+      matrix:
+        include:
+        - program-target: cairo_proof_programs
+          programs-dir: cairo_programs/proof_programs
+          extra-args: '--proof_mode'
+        - program-target: cairo_test_programs
+          programs-dir: cairo_programs
+          extra-args: ''
+    name: Compute memory and execution traces with cairo-rs
+    needs: [ build-programs, build-release ]
+    runs-on: ubuntu-22.04
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v3
+
+    - name: Fetch release binary
+      uses: actions/cache/restore@v3
+      with:
+        key: cli-bin-rel-${{ github.sha }}
+        path: target/release/cairo-vm-cli
+        fail-on-cache-miss: true
+
+    - name: Fetch programs
+      uses: actions/cache/restore@v3
+      with:
+        path: cairo_programs/**/*.json
+        key: ${{ matrix.program-target }}-cache-${{ hashFiles( 'cairo_programs/**/*.cairo' ) }}
+        fail-on-cache-miss: true
+
+    - name: Generate traces
+      run: |
+        ls ${{ matrix.programs-dir }}/*.json | cut -f1 -d'.' | \
+        xargs -P 2 -I '{program}' \
+        ./target/release/cairo-vm-cli '{program}'.json --layout starknet_with_keccak \
+        --memory_file '{program}'.rs.memory --trace_file '{program}'.rs.trace \
+        ${{ matrix.extra-args }}
+    - name: Update cache
+      uses: actions/cache/save@v3
+      with:
+        path: |
+          cairo_programs/**/*.memory
+          cairo_programs/**/*.trace
+        key: ${{ matrix.program-target }}-release-trace-cache-${{ github.sha }}
+
+
+  upload-coverage:
+    name: Upload coverage results to codecov.io
+    needs: tests
+    runs-on: ubuntu-22.04
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v3
+
+    - name: Fetch results for tests with stdlib
+      uses: actions/cache/restore@v3
+      with:
+        path: lcov-test.info
+        key: codecov-cache-test-${{ github.sha }}
+        fail-on-cache-miss: true
+    - name: Fetch results for tests without stdlib
+      uses: actions/cache/restore@v3
+      with:
+        path: lcov-test-no_std.info
+        key: codecov-cache-test-no_std-${{ github.sha }}
+        fail-on-cache-miss: true
+
     - name: Upload coverage to codecov.io
       uses: codecov/codecov-action@v3
       with:
-        token: ${{ secrets.CODECOV_TOKEN }}
-        files: lcov.info
-        fail_ci_if_error:     true
-    # NB: the following step is needed so caching doesn't cause misleading coverage in later runs
-    - name: Clean coverage artifacts
-      run: make coverage-clean
+        files: '*.info'
+        fail_ci_if_error: true
+
+
+  compare-memory-and-trace:
+    strategy:
+      matrix:
+        program-target: [ cairo_proof_programs, cairo_test_programs ]
+    name: Compare memory and execution traces from cairo-lang and cairo-rs
+    needs: [ run-cairo-reference, run-cairo-release ]
+    runs-on: ubuntu-22.04
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v3
+
+    - name: Fetch traces for cairo-lang
+      uses: actions/cache/restore@v3
+      with:
+        path: |
+          cairo_programs/**/*.memory
+          cairo_programs/**/*.trace
+        key: ${{ matrix.program-target }}-reference-trace-cache-${{ hashFiles( 'cairo_programs/**/*.cairo' ) }}
+        fail-on-cache-miss: true
+
+    - name: Fetch traces for cairo-rs
+      uses: actions/cache/restore@v3
+      with:
+        path: |
+          cairo_programs/**/*.memory
+          cairo_programs/**/*.trace
+        key: ${{ matrix.program-target }}-release-trace-cache-${{ github.sha }}
+        fail-on-cache-miss: true
+
+    - name: Run comparison script
+      run: |
+        if [ ${{ matrix.program-target }} = cairo_proof_programs ]; then
+          PROOF=proof
+        fi
+        ./src/tests/compare_vm_state.sh trace memory $PROOF
diff --git a/Makefile b/Makefile
index 3ffec8df5c..91636d609f 100644
--- a/Makefile
+++ b/Makefile
@@ -130,7 +130,7 @@ run:
 check:
 	cargo check
 
-cairo_test_programs: $(COMPILED_TESTS) $(COMPILED_BAD_TESTS)
+cairo_test_programs: $(COMPILED_TESTS) $(COMPILED_BAD_TESTS) $(COMPILED_NORETROCOMPAT_TESTS)
 cairo_proof_programs: $(COMPILED_PROOF_TESTS)
 cairo_bench_programs: $(COMPILED_BENCHES)
 
@@ -145,7 +145,7 @@ test-wasm: $(COMPILED_PROOF_TESTS) $(COMPILED_TESTS) $(COMPILED_BAD_TESTS) $(COM
 	wasm-pack test --node --no-default-features
 
 clippy:
-	cargo clippy --tests --examples --all-features -- -D warnings
+	cargo clippy --all --all-features --benches --examples --tests -- -D warnings
 
 coverage:
 	cargo llvm-cov report --lcov --output-path lcov.info
diff --git a/cairo-vm-cli/src/main.rs b/cairo-vm-cli/src/main.rs
index 354732f2e2..ac816e9fbc 100644
--- a/cairo-vm-cli/src/main.rs
+++ b/cairo-vm-cli/src/main.rs
@@ -57,7 +57,7 @@ fn validate_layout(value: &str) -> Result<(), String> {
 #[derive(Debug, Error)]
 enum Error {
     #[error("Invalid arguments")]
-    CLI(#[from] clap::Error),
+    Cli(#[from] clap::Error),
     #[error("Failed to interact with the file system")]
     IO(#[from] std::io::Error),
     #[error("The cairo program execution failed")]
@@ -109,7 +109,7 @@ fn run(args: impl Iterator<Item = String>) -> Result<(), Error> {
         Ok(args) => args,
         Err(error) => {
             eprintln!("{error}");
-            return Err(Error::CLI(error.into()));
+            return Err(Error::Cli(error));
         }
     };
     let trace_enabled = args.trace_file.is_some();
@@ -123,7 +123,7 @@ fn run(args: impl Iterator<Item = String>) -> Result<(), Error> {
         secure_run: args.secure_run,
     };
 
-    let program_content = std::fs::read(args.filename).map_err(|e| Error::IO(e))?;
+    let program_content = std::fs::read(args.filename).map_err(Error::IO)?;
 
     let (cairo_runner, mut vm) =
         match cairo_run::cairo_run(&program_content, &cairo_run_config, &mut hint_executor) {
@@ -177,15 +177,15 @@ mod tests {
     #[case([].as_slice())]
     #[case(["cairo-vm-cli"].as_slice())]
     fn test_run_missing_mandatory_args(#[case] args: &[&str]) {
-        let args = args.into_iter().cloned().map(String::from);
-        assert_matches!(run(args), Err(Error::CLI(_)));
+        let args = args.iter().cloned().map(String::from);
+        assert_matches!(run(args), Err(Error::Cli(_)));
     }
 
     #[rstest]
     #[case(["cairo-vm-cli", "--layout", "broken_layout", "../cairo_programs/fibonacci.json"].as_slice())]
     fn test_run_invalid_args(#[case] args: &[&str]) {
-        let args = args.into_iter().cloned().map(String::from);
-        assert_matches!(run(args), Err(Error::CLI(_)));
+        let args = args.iter().cloned().map(String::from);
+        assert_matches!(run(args), Err(Error::Cli(_)));
     }
 
     #[rstest]
diff --git a/felt/src/bigint_felt.rs b/felt/src/bigint_felt.rs
index 4433203acf..8e3ad92039 100644
--- a/felt/src/bigint_felt.rs
+++ b/felt/src/bigint_felt.rs
@@ -1087,7 +1087,7 @@ mod tests {
             let p = &CAIRO_PRIME_BIGUINT;
             let result = x + y;
             let as_uint = &result.to_biguint();
-            prop_assert!(as_uint < &p, "{}", as_uint);
+            prop_assert!(as_uint < p, "{}", as_uint);
 
         }
         #[test]
@@ -1098,7 +1098,7 @@ mod tests {
             let p = &CAIRO_PRIME_BIGUINT;
             x += y;
             let as_uint = &x.to_biguint();
-            prop_assert!(as_uint < &p, "{}", as_uint);
+            prop_assert!(as_uint < p, "{}", as_uint);
         }
 
         #[test]
@@ -1211,10 +1211,10 @@ mod tests {
             let y = FeltBigInt::<FIELD_HIGH, FIELD_LOW>::parse_bytes(y.as_bytes(), 10).unwrap();
             let z = FeltBigInt::<FIELD_HIGH, FIELD_LOW>::parse_bytes(z.as_bytes(), 10).unwrap();
             let p:BigUint = BigUint::parse_bytes(CAIRO_PRIME_BIGUINT.to_string().as_bytes(), 16).unwrap();
-            let v = vec![x.clone(), y, z];
+            let v = vec![x, y, z];
             let result: FeltBigInt<FIELD_HIGH, FIELD_LOW> = v.into_iter().sum();
             let as_uint = result.to_biguint();
-            prop_assert!(&as_uint < &p, "{}", as_uint);
+            prop_assert!(as_uint < p, "{}", as_uint);
         }
     }
 }
diff --git a/felt/src/lib.rs b/felt/src/lib.rs
index bc7470b785..c562faea1f 100644
--- a/felt/src/lib.rs
+++ b/felt/src/lib.rs
@@ -51,7 +51,6 @@ pub(crate) trait FeltOps {
     #[cfg(any(feature = "std", feature = "alloc"))]
     fn to_str_radix(&self, radix: u32) -> String;
 
-    #[deprecated]
     /// Converts [`Felt252`] into a [`BigInt`] number in the range: `(- FIELD / 2, FIELD / 2)`.
     ///
     /// # Examples
@@ -68,7 +67,6 @@ pub(crate) trait FeltOps {
     /// ```
     fn to_bigint(&self) -> BigInt;
 
-    #[deprecated]
     /// Converts [`Felt252`] into a [`BigUint`] number.
     ///
     /// # Examples
diff --git a/hint_accountant/src/main.rs b/hint_accountant/src/main.rs
index 973c78ef8b..31100ad5c3 100644
--- a/hint_accountant/src/main.rs
+++ b/hint_accountant/src/main.rs
@@ -11,10 +11,9 @@ use cairo_vm::{
     with_std::collections::{HashMap, HashSet},
 };
 use serde::Deserialize;
-use serde_json;
 use serde_json::Value;
 
-const WHITELISTS: [&'static str; 15] = [
+const WHITELISTS: [&str; 15] = [
     include_str!("../whitelists/0.10.3.json"),
     include_str!("../whitelists/0.6.0.json"),
     include_str!("../whitelists/0.8.2.json"),
@@ -65,7 +64,7 @@ fn run() {
         .map(|ahe| ahe.hint_lines.join("\n"))
         .filter(|h| {
             let hint_data = hint_executor
-                .compile_hint(&h, &ap_tracking_data, &reference_ids, &references)
+                .compile_hint(h, &ap_tracking_data, &reference_ids, &references)
                 .expect("this implementation is infallible");
             matches!(
                 hint_executor.execute_hint(&mut vm, &mut exec_scopes, &hint_data, &constants),
@@ -76,7 +75,7 @@ fn run() {
 
     println!("{} missing hints:", missing_hints.len());
     for hint in missing_hints.iter() {
-        println!("");
+        println!();
         println!("```");
         println!("%{{");
         println!("{hint}");
diff --git a/rust-toolchain b/rust-toolchain
deleted file mode 100644
index fc46be00b4..0000000000
--- a/rust-toolchain
+++ /dev/null
@@ -1,4 +0,0 @@
-[toolchain]
-channel = "1.66.1"
-components = ["rustfmt", "clippy"]
-profile = "minimal"
diff --git a/src/vm/errors/vm_exception.rs b/src/vm/errors/vm_exception.rs
index 1949d19460..f845ec3f49 100644
--- a/src/vm/errors/vm_exception.rs
+++ b/src/vm/errors/vm_exception.rs
@@ -271,7 +271,7 @@ impl Location {
         if !(0 < self.start_line && ((self.start_line - 1) as usize) < split_lines.len()) {
             return String::new();
         }
-        let start_line = split_lines[((self.start_line - 1) as usize)];
+        let start_line = split_lines[(self.start_line - 1) as usize];
         let start_col = self.start_col as usize;
         let mut result = format!("{start_line}\n");
         let end_col = if self.start_line == self.end_line {