diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 026aaad2..5d84e7f4 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -9,12 +9,16 @@ on:
 
 jobs:
   build:
+    strategy:
+      matrix:
+        haxe-version: [latest, 4.3.7, 4.2.5]
+      fail-fast: false
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v3
     - uses: krdlab/setup-haxe@v1
       with:
-          haxe-version: 4.3.4
+        haxe-version: ${{ matrix.haxe-version }}
     - name: Install haxelib dependencies
       run: |
         haxelib install hx3compat
diff --git a/hscript/Checker.hx b/hscript/Checker.hx
index 7ee549da..7be5b746 100644
--- a/hscript/Checker.hx
+++ b/hscript/Checker.hx
@@ -1052,7 +1052,7 @@ class Checker {
 			switch( e.e ) {
 			case EField(obj, f):
 				if( cf.isMethod ) {
-					switch( callExpr?.e ) {
+					switch( callExpr == null ? null : callExpr.e ) {
 					case null:
 					case ECall(ec,params) if( ec == e ):
 						e.e = EField(acc,f);
diff --git a/hscript/JsInterp.hx b/hscript/JsInterp.hx
index 9161c441..2f91a7d6 100644
--- a/hscript/JsInterp.hx
+++ b/hscript/JsInterp.hx
@@ -264,6 +264,7 @@ class JsInterp extends Interp {
 			default:
 				error(EInvalidOp(op));
 			}
+			return null;
 		case EUnop(op, prefix, e):
 			switch( op ) {
 			case "!":
@@ -300,6 +301,7 @@ class JsInterp extends Interp {
 			default:
 				error(EInvalidOp(op));
 			}
+			return null;
 		case ECall(e, params):
 			var args = [for( p in params ) exprValue(p)];
 			switch( Tools.expr(e) ) {