sema: early return inside file stmts with errors

compiler/ast/Stmt.v

@@ -31,7 +31,8 @@ pub:
 	name_pos    FilePos
 	args        []FnArg
 	return_type Type
-	stmts       []Stmt
+pub mut:
+	stmts []Stmt
 }
 
 pub struct FnArg {

compiler/context/mod.v

@@ -185,8 +185,13 @@ pub fn (mut ctx CContext) load_primitive_types() {
 	}
 }
 
+@[inline]
+pub fn (ctx &CContext) code_has_errors() bool {
+	return ctx.report.errors > 0
+}
+
 pub fn (ctx &CContext) abort_if_errors() {
-	if ctx.report.errors > 0 {
+	if ctx.code_has_errors() {
 		reason := if ctx.report.errors == 1 {
 			'aborting due to previous error'
 		} else {

compiler/sema/mod.v

@@ -42,15 +42,24 @@ fn (mut sema Sema) check_file(mut file ast.File) {
 	sema.file.scope = ast.Scope.new(sema.ctx.universe, sema.sym)
 	sema.scope = sema.file.scope
 
-	sema.first_pass = true
-	sema.stmts(mut sema.file.stmts)
+	sema.file_stmts(true)
+	if sema.ctx.code_has_errors() {
+		return
+	}
 
-	sema.first_pass = false
-	sema.stmts(mut sema.file.stmts)
+	sema.file_stmts(false)
+	if sema.ctx.code_has_errors() {
+		return
+	}
 
 	sema.ctx.files << sema.file
 }
 
+fn (mut sema Sema) file_stmts(first_pass bool) {
+	sema.first_pass = first_pass
+	sema.stmts(mut sema.file.stmts)
+}
+
 fn (mut sema Sema) stmts(mut stmts []ast.Stmt) {
 	for mut stmt in stmts {
 		sema.stmt(mut stmt)
@@ -73,5 +82,7 @@ fn (mut sema Sema) fn_stmt(mut stmt ast.FnStmt) {
 			args: stmt.args
 			node: unsafe { stmt }
 		}) or { context.error(err.msg(), stmt.name_pos) }
+		sema.stmts(mut stmt.stmts)
+		return
 	}
 }