Harden semantic validation and preserve source diagnostics

.github/workflows/rust.yml

@@ -18,7 +18,7 @@ concurrency:
   cancel-in-progress: true
 
 jobs:
-  build-ubuntu:
+  build-linux-amd64:
     runs-on: ubuntu-latest
     timeout-minutes: 45
 
@@ -69,7 +69,7 @@ jobs:
       - name: Run Wave end-to-end tests
         run: python3 tools/run_tests.py
 
-  build-macos:
+  build-macos-arm64:
     runs-on: macos-latest
     timeout-minutes: 45
 
@@ -129,7 +129,7 @@ jobs:
       - name: Run Wave end-to-end tests
         run: python3 tools/run_tests.py
 
-  build-windows:
+  build-windows-amd64:
     runs-on: windows-latest
     timeout-minutes: 60
 
@@ -144,12 +144,19 @@ jobs:
           install: >-
             mingw-w64-x86_64-gcc
             mingw-w64-x86_64-python
-            mingw-w64-x86_64-llvm-21
-            mingw-w64-x86_64-lld-21
             mingw-w64-x86_64-libffi
             mingw-w64-x86_64-zstd
             mingw-w64-x86_64-zlib
 
+      - name: Install pinned LLVM 21 and LLD packages
+        shell: msys2 {0}
+        run: |
+          set -euo pipefail
+
+          pacman --noconfirm -U \
+            https://mirror.msys2.org/mingw/mingw64/mingw-w64-x86_64-llvm-21-21.1.8-5-any.pkg.tar.zst \
+            https://mirror.msys2.org/mingw/mingw64/mingw-w64-x86_64-lld-21-21.1.8-5-any.pkg.tar.zst
+
       - name: Install Rust GNU toolchain
         shell: msys2 {0}
         run: |

.gitignore

@@ -49,6 +49,7 @@ desktop.ini
 *.old
 *.orig
 *.rej
+/.tmp/
 /tmp/
 /temp/
 

examples/tcp.wave

@@ -107,7 +107,7 @@ fun syscall5(id: i64, a1: i64, a2: i64, a3: i64, p4: ptr<i8>, a5: i64) -> i64 {
 fun htons(x: i16) -> i16 {
     var a: i32 = x;
     var y: i32 = ((a & 255) << 8) | ((a >> 8) & 255);
-    return y;
+    return y as i16;
 }
 
 fun _setsockopt_reuseaddr(sockfd: i64) {

front/parser/src/import.rs

@@ -332,6 +332,7 @@ pub fn preprocess_target_attrs(source: &str, target: &TargetConditionContext) ->
 pub struct ImportedUnit {
     pub abs_path: PathBuf,
     pub ast: Vec<ASTNode>,
+    pub source: String,
 }
 
 #[derive(Debug, Clone, Default)]
@@ -653,6 +654,7 @@ fn parse_wave_file(
         return Ok(ImportedUnit {
             abs_path,
             ast: vec![],
+            source: String::new(),
         });
     }
     already_imported.insert(abs_path_str);
@@ -719,5 +721,9 @@ fn parse_wave_file(
         we
     })?;
 
-    Ok(ImportedUnit { abs_path, ast })
+    Ok(ImportedUnit {
+        abs_path,
+        ast,
+        source: content,
+    })
 }