vala: Report error for yield statements without async context

3 files changed, 21 insertions, 0 deletions

diff --git a/tests/Makefile.am b/tests/Makefile.am
index 41481e7e8..f0000a94b 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -715,6 +715,7 @@ TESTS = \
 	semantic/yield-call-requires-async-method.test \
 	semantic/yield-creation-requires-async-context.test \
 	semantic/yield-creation-requires-async-method.test \
+	semantic/yield-statement-requires-async-context.test \
 	$(NULL)
 
 NON_NULL_TESTS = \
diff --git a/tests/semantic/yield-statement-requires-async-context.test b/tests/semantic/yield-statement-requires-async-context.test
new file mode 100644
index 000000000..8dd03950b
--- /dev/null
+++ b/tests/semantic/yield-statement-requires-async-context.test
@@ -0,0 +1,5 @@
+Invalid Code
+
+void main () {
+	yield;
+}
diff --git a/vala/valayieldstatement.vala b/vala/valayieldstatement.vala
index 795de2761..91d8e7f9f 100644
--- a/vala/valayieldstatement.vala
+++ b/vala/valayieldstatement.vala
@@ -35,6 +35,21 @@ public class Vala.YieldStatement : CodeNode, Statement {
 		this.source_reference = source_reference;
 	}
 
+	public override bool check (CodeContext context) {
+		if (checked) {
+			return !error;
+		}
+
+		checked = true;
+
+		if (context.analyzer.current_method == null || !context.analyzer.current_method.coroutine) {
+			error = true;
+			Report.error (source_reference, "yield statement not available outside async method");
+		}
+
+		return !error;
+	}
+
 	public override void emit (CodeGenerator codegen) {
 		codegen.visit_yield_statement (this);
 	}