Add CannotInlineException message to debug log

Author: MaartenS11

Diff for: base/src/main/java/proguard/optimize/lambdainline/BaseLambdaInliner.java

@@ -1,5 +1,7 @@
 package proguard.optimize.lambdainline;
 
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 import proguard.classfile.AccessConstants;
 import proguard.classfile.ClassPool;
 import proguard.classfile.Clazz;
@@ -47,6 +49,7 @@
  * instruction if this class manages to inline the lambda.
  */
 public abstract class BaseLambdaInliner {
+    private static final Logger logger = LogManager.getLogger();
     private final Clazz consumingClass;
     private final Method consumingMethod;
     private final ClassPool programClassPool;
@@ -192,6 +195,8 @@ public void visitProgramMethod(ProgramClass programClass, ProgramMethod method)
             try {
                 copiedConsumingMethod.accept(consumingClass, new RecursiveInliner(calledLambdaIndex));
             } catch (CannotInlineException cie) {
+                logger.debug("Aborting inlining this lambda into this method. Reason:");
+                logger.debug(cie.getMessage());
                 ClassEditor classEditor = new ClassEditor((ProgramClass) consumingClass);
                 classEditor.removeMethod(copiedConsumingMethod);
                 classEditor.removeMethod(staticInvokeMethod);

Diff for: base/src/main/java/proguard/optimize/lambdainline/RecursiveInliner.java

@@ -100,7 +100,6 @@ public void visitVariableInstruction(Clazz clazz, Method method, CodeAttribute c
                     int sizeAdjustedLambdaIndex = ClassUtil.internalMethodVariableIndex(consumingMethodDescriptor, true, lambdaConsumingMethodArgIndex);
 
                     if (variableSourceInstruction.variableIndex == sizeAdjustedLambdaIndex) {
-                        logger.debug("Cannot inline lambdas into functions that call other functions that consume this lambda!");
                         throw new CannotInlineException("Cannot inline lambdas into functions that call other functions that consume this lambda!");
                     }
                 }