Bug 538192 - [1.8][compiler] Eclipse IDE compiler error (lambda), using

io.cucumber.datatable.DataTableType

Change-Id: I3af5f99587f34fdcbff08c5d1635115b382a159c
Signed-off-by: Stephan Herrmann <stephan.herrmann@berlin.de>

2 files changed, 22 insertions, 0 deletions

diff --git a/org.eclipse.jdt.core.tests.compiler/src/org/eclipse/jdt/core/tests/compiler/regression/GenericsRegressionTest_1_8.java b/org.eclipse.jdt.core.tests.compiler/src/org/eclipse/jdt/core/tests/compiler/regression/GenericsRegressionTest_1_8.java
index 4bf0b94b6e..c57ea95c8e 100644
--- a/org.eclipse.jdt.core.tests.compiler/src/org/eclipse/jdt/core/tests/compiler/regression/GenericsRegressionTest_1_8.java
+++ b/org.eclipse.jdt.core.tests.compiler/src/org/eclipse/jdt/core/tests/compiler/regression/GenericsRegressionTest_1_8.java
@@ -9512,4 +9512,24 @@ public void testBug508834_comment0() {
 		};
 		runner.runConformTest();
 	}
+	public void testBug538192() {
+		Runner runner = new Runner();
+		runner.testFiles = new String[] {
+			"Test.java",
+			"import java.util.*;\n" + 
+			"import java.util.function.Function;\n" +
+			"interface ListFunc<T> extends Function<List<String>, T> {}\n" + 
+			"interface MapFunc<T> extends Function<Map<String,String>, T> {}\n" + 
+			"class DTT {\n" + 
+			"	public <T> DTT(Class<T> c, ListFunc<T> f) {}\n" + 
+			"	public <T> DTT(Class<T> c, MapFunc<T> f) {} \n" + 
+			"}\n" +
+			"public class Test {\n" +
+			"	void test() {\n" +
+			"		new DTT(Integer.class, (Map<String, String> row) -> Integer.valueOf(0));\n" +
+			"	}\n" +
+			"}\n"
+		};
+		runner.runConformTest();
+	}
 }
diff --git a/org.eclipse.jdt.core/compiler/org/eclipse/jdt/internal/compiler/ast/LambdaExpression.java b/org.eclipse.jdt.core/compiler/org/eclipse/jdt/internal/compiler/ast/LambdaExpression.java
index 08067d8306..b252d45f42 100644
--- a/org.eclipse.jdt.core/compiler/org/eclipse/jdt/internal/compiler/ast/LambdaExpression.java
+++ b/org.eclipse.jdt.core/compiler/org/eclipse/jdt/internal/compiler/ast/LambdaExpression.java
@@ -481,6 +481,8 @@ public class LambdaExpression extends FunctionalExpression implements IPolyExpre
 		if (expected.isParameterizedType() && argument.isParameterizedType()) {
 			TypeBinding[] expectedArgs = ((ParameterizedTypeBinding)expected).typeArguments();
 			TypeBinding[] args = ((ParameterizedTypeBinding)argument).typeArguments();
+			if (args.length != expectedArgs.length)
+				return false;
 			for (int j = 0; j < args.length; j++) {
 				if (TypeBinding.notEquals(expectedArgs[j], args[j])) {
 					if (expectedArgs[j].isWildcard() && args[j].isUnboundWildcard()) {