diff --git a/duchain/tests/duchain.h b/duchain/tests/duchain.h
--- a/duchain/tests/duchain.h
+++ b/duchain/tests/duchain.h
@@ -142,6 +142,8 @@
     void closureParser();
     void closures();
     void closureEmptyUse();
+    void iifeParser();
+    void iife();
     void gotoTest();
     void ternary();
     void bug296709();
diff --git a/duchain/tests/duchain.cpp b/duchain/tests/duchain.cpp
--- a/duchain/tests/duchain.cpp
+++ b/duchain/tests/duchain.cpp
@@ -2834,6 +2834,37 @@
     QCOMPARE(top->problems().size(), 1);
 }
 
+void TestDUChain::iifeParser()
+{
+    // testcase for bug https://bugs.kde.org/show_bug.cgi?id=370515
+    TopDUContext* top = parse("<?php\n"
+                              "$lambda1 = (function() {return 5;})();\n"
+                              "$lambda2 = (function($a) {return $a;})(50);\n"
+                              "$lambda3 = (function($a){ return function($b) use ($a){echo $a + $b;};})(50); \n"
+                              "$lambda4 = (function ($a){echo $a;})(10) + (function ($a){echo $a ;})(20);"
+                              , DumpNone);
+
+    QVERIFY(top);
+
+    DUChainReleaser releaseTop(top);
+    DUChainWriteLocker lock;
+    QVERIFY(top->problems().empty());
+}
+
+void TestDUChain::iife()
+{
+    TopDUContext* top = parse("<?php $l = (function($a){ return function($b) use ($a){echo $a + $b;};})(50); \n", DumpNone);
+    QVERIFY(top);
+    DUChainReleaser releaseTop(top);
+    DUChainWriteLocker lock;
+    QVERIFY(top->problems().isEmpty()); 
+    QCOMPARE(top->localDeclarations().count(), 2);
+    Declaration* l = top->localDeclarations().first();
+    QCOMPARE(l->identifier().toString(), QString("l"));
+    Declaration* iife = top->localDeclarations().last();
+    QVERIFY(iife->identifier().isEmpty());
+}
+
 void TestDUChain::gotoTest()
 {
     TopDUContext* top = parse("<?php goto dest; dest: \n", DumpNone);
diff --git a/parser/php.g b/parser/php.g
--- a/parser/php.g
+++ b/parser/php.g
@@ -546,8 +546,8 @@
   | varExpressionArray=varExpressionArray arrayIndex=arrayIndexSpecifier*
 -> varExpression ;;
 
-
-    LPAREN try/rollback (newObject=varExpressionNewObject RPAREN (#variableProperties=instantiationAccess*))
+    (?[: LA(1).kind == Token_LPAREN && LA(2).kind == Token_FUNCTION && LA(3).kind == Token_LPAREN :] iife=iifeSyntax )
+  | LPAREN try/rollback (newObject=varExpressionNewObject RPAREN (#variableProperties=instantiationAccess*))
     catch (expression=expr RPAREN)
   | BACKTICK encapsList=encapsList BACKTICK
   --try/rollback resolves conflict scalar vs. staticMember (foo::bar vs. foo::$bar)
@@ -579,6 +579,10 @@
         LBRACE try/recover(functionBody=innerStatementList) RBRACE
 -> closure ;;
 
+    LPAREN try/rollback (closure=closure RPAREN LPAREN parameterList=functionCallParameterList RPAREN)
+    catch (expression=expr RPAREN)
+-> iifeSyntax ;;
+
   (#lexicalVars=lexicalVar @ COMMA) | 0 [: reportProblem(Error, QStringLiteral("Use list of closure must not be empty.")); :]
 -> lexicalVarList ;;