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https://issues.apache.org/jira/browse/GROOVY-9853?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17540440#comment-17540440
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Eric Milles edited comment on GROOVY-9853 at 5/21/22 3:10 PM:
--------------------------------------------------------------
Isolated a bit further:
{code:groovy}
@groovy.transform.CompileStatic
def test() {
java.util.function.Function<CharSequence> f = CharSequence::length
f.applyAsInt("")
}
print test()
{code}
Java equivalent that runs successfully:
{code:java}
public class Groovy9853 {
public static void main(String[] args) throws Exception {
java.util.function.ToIntFunction<CharSequence> f = CharSequence::length;
System.err.println(f.applyAsInt(""));
}
}
{code}
{code}
// Compiled from Groovy9853.java (version 1.8 : 52.0, super bit)
public class Groovy9853 {
// Method descriptor #6 ()V
// Stack: 1, Locals: 1
public Temporary();
0 aload_0 [this]
1 invokespecial java.lang.Object() [8]
4 return
Line numbers:
[pc: 0, line: 3]
Local variable table:
[pc: 0, pc: 5] local: this index: 0 type: Groovy9853
// Method descriptor #15 ([Ljava/lang/String;)V
// Stack: 3, Locals: 2
public static void main(java.lang.String[] args) throws java.lang.Exception;
0 invokedynamic 0 applyAsInt() : java.util.function.ToIntFunction [19]
5 astore_1 [f]
6 getstatic java.lang.System.err : java.io.PrintStream [23]
9 aload_1 [f]
10 ldc <String ""> [29]
12 invokeinterface
java.util.function.ToIntFunction.applyAsInt(java.lang.Object) : int [31]
[nargs: 2]
17 invokevirtual java.io.PrintStream.println(int) : void [36]
20 return
Line numbers:
[pc: 0, line: 5]
[pc: 6, line: 6]
[pc: 20, line: 25]
Local variable table:
[pc: 0, pc: 21] local: args index: 0 type: java.lang.String[]
[pc: 6, pc: 21] local: f index: 1 type: java.util.function.ToIntFunction
Local variable type table:
[pc: 6, pc: 21] local: f index: 1 type:
java.util.function.ToIntFunction<java.lang.CharSequence>
Method Parameters:
args
Inner classes:
[inner class info: #70 java/lang/invoke/MethodHandles$Lookup, outer class
info: #72 java/lang/invoke/MethodHandles
inner name: #74 Lookup, accessflags: 25 public static final]
Bootstrap methods:
0 : # 58 invokestatic
java/lang/invoke/LambdaMetafactory.metafactory:(Ljava/lang/invoke/MethodHandles$Lookup;Ljava/lang/String;Ljava/lang/invoke/MethodType;Ljava/lang/invoke/MethodType;Ljava/lang/invoke/MethodHandle;Ljava/lang/invoke/MethodType;)Ljava/lang/invoke/CallSite;
Method arguments:
#59 (Ljava/lang/Object;)I
#66 null
#68 (Ljava/lang/CharSequence;)I
}
{code}
was (Author: emilles):
Isolated a bit further:
{code:groovy}
@groovy.transform.CompileStatic
def test() {
java.util.function.Function<CharSequence> f = CharSequence::length
f.applyAsInt("")
}
print test()
{code}
Java equivalent that runs successfully:
{code:java}
public class Groovy9853 {
public static void main(String[] args) throws Exception {
java.util.function.ToIntFunction<CharSequence> f = CharSequence::length;
System.err.println(f.applyAsInt(""));
}
}
{code}
{code}
// Compiled from Temporary.java (version 1.8 : 52.0, super bit)
public class Temporary {
// Method descriptor #6 ()V
// Stack: 1, Locals: 1
public Temporary();
0 aload_0 [this]
1 invokespecial java.lang.Object() [8]
4 return
Line numbers:
[pc: 0, line: 3]
Local variable table:
[pc: 0, pc: 5] local: this index: 0 type: Temporary
// Method descriptor #15 ([Ljava/lang/String;)V
// Stack: 3, Locals: 2
public static void main(java.lang.String[] args) throws java.lang.Exception;
0 invokedynamic 0 applyAsInt() : java.util.function.ToIntFunction [19]
5 astore_1 [f]
6 getstatic java.lang.System.err : java.io.PrintStream [23]
9 aload_1 [f]
10 ldc <String ""> [29]
12 invokeinterface
java.util.function.ToIntFunction.applyAsInt(java.lang.Object) : int [31]
[nargs: 2]
17 invokevirtual java.io.PrintStream.println(int) : void [36]
20 return
Line numbers:
[pc: 0, line: 5]
[pc: 6, line: 6]
[pc: 20, line: 25]
Local variable table:
[pc: 0, pc: 21] local: args index: 0 type: java.lang.String[]
[pc: 6, pc: 21] local: f index: 1 type: java.util.function.ToIntFunction
Local variable type table:
[pc: 6, pc: 21] local: f index: 1 type:
java.util.function.ToIntFunction<java.lang.CharSequence>
Method Parameters:
args
Inner classes:
[inner class info: #70 java/lang/invoke/MethodHandles$Lookup, outer class
info: #72 java/lang/invoke/MethodHandles
inner name: #74 Lookup, accessflags: 25 public static final]
Bootstrap methods:
0 : # 58 invokestatic
java/lang/invoke/LambdaMetafactory.metafactory:(Ljava/lang/invoke/MethodHandles$Lookup;Ljava/lang/String;Ljava/lang/invoke/MethodType;Ljava/lang/invoke/MethodType;Ljava/lang/invoke/MethodHandle;Ljava/lang/invoke/MethodType;)Ljava/lang/invoke/CallSite;
Method arguments:
#59 (Ljava/lang/Object;)I
#66 null
#68 (Ljava/lang/CharSequence;)I
}
{code}
> ClassFormatError using method reference on interface target
> -----------------------------------------------------------
>
> Key: GROOVY-9853
> URL: https://issues.apache.org/jira/browse/GROOVY-9853
> Project: Groovy
> Issue Type: Bug
> Affects Versions: 3.0.7, 4.0.2
> Reporter: Christopher Smith
> Priority: Major
>
> After upgrading to 3.0.7, using {{interfaceField::method}} is resulting in
> bytecode output containing an InterfaceMethodref that looks as expected. When
> running it in the Eclipse JUnit runner, however (which I think is
> unimportant), I'm getting a loading error from the JVM:
> {code}
> Caused by: java.lang.ClassFormatError: Invalid constant pool index 130 in
> class file com/example/sendgrid/SendgridMailSender (not a method)
> {code}
> where the offending constant is
> {code}
> #130 = InterfaceMethodref #126.#129 //
> com/sendgrid/SendGridAPI.api:(Lcom/sendgrid/Request;)Lcom/sendgrid/Response;
> {code}
> from the 4.6.8 SendGrid SDK.
> Compiling with 3.0.6 seems to work. Replacing {{::}} with {{.&}} seems to
> work.
> The JVM is 11.0.9-hs-adpt.
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