Add lambda methods test in debuginfotest

Catches JDK-8281266

substratevm/mx.substratevm/testhello.py

@@ -270,6 +270,14 @@ def test():
     checker = Checker("info func greet", rexp)
     checker.check(exec_string)
 
+    # look up lambda method
+    exec_string = execute("info func Hello$$Lambda")
+    rexp = [r'All functions matching regular expression "Hello\$\$Lambda":',
+            r"File hello/Hello\.java:",
+            r"%sjava\.lang\.Object \*hello\.Hello\$\$Lambda\$%s[\./][^:]+::get\(hello\.Hello\$\$Lambda\$%s[\./]%s \*\);"%(maybe_spaces_pattern, digits_pattern, digits_pattern, wildcard_pattern)]
+    checker = Checker("info func Hello$$Lambda", rexp)
+    checker.check(exec_string)
+
     # step into method call
     execute("step")
 
@@ -453,7 +461,6 @@ def test():
     # print details of Hello type
     exec_string = execute("ptype 'hello.Hello'")
     rexp = [r"type = class hello\.Hello : public java\.lang\.Object {",
-            # ptype lists inlined methods although they are not listed with info func
             r"%sprivate:"%spaces_pattern,
             r"%sstatic void inlineA\(void\);"%spaces_pattern,
             r"%sstatic void inlineCallChain\(void\);"%spaces_pattern,
@@ -466,6 +473,7 @@ def test():
             r"%sstatic void inlineReceiveConstants\(byte, int, long, java\.lang\.String \*, float, double\);"%spaces_pattern,
             r"%sstatic void inlineTailRecursion\(int\);"%spaces_pattern,
             r"%sstatic void inlineTo\(int\);"%spaces_pattern,
+            r"%sstatic java\.lang\.String \* lambda\$static\$%s\(void\);"%(spaces_pattern, digits_pattern),
             r"%spublic:"%spaces_pattern,
             r"%sstatic void main\(java\.lang\.String\[\] \*\);"%spaces_pattern,
             r"%sprivate:"%spaces_pattern,

substratevm/src/com.oracle.svm.test/src/hello/Hello.java

@@ -234,4 +234,6 @@ private static void inlineReceiveConstants(byte b, int i, long l, String s, floa
         System.out.println(String.format("q = %g\n", q));
         System.out.println(String.format("t = %s\n", t));
     }
+
+    final static java.util.function.Supplier<String> lambda = () -> "lambdaText";
 }