hg: jdk/jdk15: 8238735: NPE compiling lambda expression within conditional expression

[maurizio.cimadamore at oracle.com]

Changeset: 2ed7a5ed4b7f
Author:    asotona
Date:      2020-06-17 13:18 +0200
URL:       https://hg.openjdk.java.net/jdk/jdk15/rev/2ed7a5ed4b7f

8238735: NPE compiling lambda expression within conditional expression
Summary: The fix saves result type from the first pass through the Attr.visitLambda and returns it after recovery pass to avoid NPE caused by exposure of Type.recoveryType
Reviewed-by: mcimadamore

! src/jdk.compiler/share/classes/com/sun/tools/javac/comp/Attr.java
+ test/langtools/tools/javac/8238735/T8238735.java
+ test/langtools/tools/javac/8238735/T8238735.out