我在混淆java8源代码时遇到了持久性问题。 Lambda方法引用在函数中多次使用时似乎在运行时失败。 失败的代码：
Set<String> roleNames = this.userDAO.getUserRoles(userDTO.getId()).stream().map(RoleDTO::getName).collect(Collectors.toSet());
SimpleAuthorizationInfo authorizationInfo = new SimpleAuthorizationInfo(roleNames);
Set<String> permissions = this.userDAO.getUserPermissions(userDTO.getId()).stream().map(NameDescriptionDTO::getName).collect(Collectors.toSet());
authorizationInfo.addStringPermissions(permissions);
在使用maven和java 8.0_40进行编译时，这很正常，但是当proguard使用以下堆栈跟踪对lib进行模糊处理时，这会失败：
org.jboss.weld.interceptor.proxy.InterceptorException: java.lang.BootstrapMethodError: call site initialization exception
~
Caused by: java.lang.invoke.LambdaConversionException: Invalid receiver type class package.db.dto.PermissionDTO; not a subtype of implementation type class package.db.dto.RoleDTO
at java.lang.invoke.AbstractValidatingLambdaMetafactory.validateMetafactoryArgs(AbstractValidatingLambdaMetafactory.java:233) ~[?:1.8.0_40]
at java.lang.invoke.LambdaMetafactory.metafactory(LambdaMetafactory.java:303) ~[?:1.8.0_40]
at java.lang.invoke.CallSite.makeSite(CallSite.java:302) ~[?:1.8.0_40]
at java.lang.invoke.MethodHandleNatives.linkCallSiteImpl(MethodHandleNatives.java:307) ~[?:1.8.0_40]
at java.lang.invoke.MethodHandleNatives.linkCallSite(MethodHandleNatives.java:297) ~[?:1.8.0_40]
at package.method(Unknown Source) ~[LIB.jar:?]
proguard-maven-plugin设置：
<options>
<option>-dontshrink</option>
<option>-dontoptimize</option>
<option>-keepdirectories</option>
<option>-keepattributes Signature</option>
<option>-keepattributes *Annotation*</option>
<option>-keep public class * implements Foo</option>
<option>-keepclassmembers,allowshrinking,allowobfuscation class * { synthetic <methods>; }</option>
</options>
重写代码以使用lambda表达式而不是方法引用格式似乎确实有效，但是当我在整个源代码中的许多地方使用方法引用时，这只是最后的解决方案：
Set<String> roleNames = this.userDAO.getRoles(userDTO.getId()).stream().map(r -> r.getName()).collect(Collectors.toSet());
Set<String> permissions = this.userDAO.getPermissions(userDTO.getId()).stream().map(p -> p.getName()).collect(Collectors.toSet());
我调查了错误消息，似乎存在可能相关的JVM错误（LambdaConversionException with generics: JVM bug?）。 使用cfr_0_98反编译混淆和未混淆的java文件并没有显示任何明显的差异： 模糊输出：
Set set = this.userDAO.a(userDTO.getId()).stream().map((Function<package.db.dto.RoleDTO, String>)LambdaMetafactory.metafactory(null, null, null, (Ljava/lang/Object;)Ljava/lang/Object;, getName(), (package/db/dto/RoleDTO;)Ljava/lang/String;)()).collect(Collectors.toSet());
Set set2 = this.userDAO.c(userDTO.getId()).stream().map((Function<package.db.dto.PermissionDTO, String>)LambdaMetafactory.metafactory(null, null, null, (Ljava/lang/Object;)Ljava/lang/Object;, getName(), (Lpackage /db/dto/PermissionDTO;)Ljava/lang/String;)()).collect(Collectors.toSet());
未经模糊处理的输出（来自其他计算机现在更具可读性并且还显示问题.RightsDTO被错误地使用了2次！）：
Set set = this.userDAO.a(userDTO.getId()).stream().map(RoleDTO::getName).collect(Collectors.toSet());
Set set2 = this.userDAO.c(userDTO.getId()).stream().map(RoleDTO::getName).collect(Collectors.toSet());
非常感谢Proguard旗帜可以帮助我们的任何指针。
编辑：
这是被反汇编的混淆字节码（javap -v）：
Last modified 20-mrt-2015; size 3949 bytes
MD5 checksum 1d3582e145d46fc813957931629413ff
public class package.web.security.impl.DefaultSecurityRealm extends org.apache.shiro.realm.AuthorizingRealm
BootstrapMethods:
0: #63 invokestatic java/lang/invoke/LambdaMetafactory.metafactory:(Ljava/lang/invoke/MethodHandles$Lookup;Ljava/lang/String;Ljava/lang/invoke/MethodType;Ljava/lang/invoke/MethodType;Ljava/lang/invoke/MethodHandle;Ljava/lang/invoke/MethodType;)Ljava/lang/invoke/CallSite;
Method arguments:
#93 (Ljava/lang/Object;)Ljava/lang/Object;
#62 invokevirtual package/db/dto/RoleDTO.getName:()Ljava/lang/String;
#95 (Lpackage/db/dto/RoleDTO;)Ljava/lang/String;
1: #63 invokestatic java/lang/invoke/LambdaMetafactory.metafactory:(Ljava/lang/invoke/MethodHandles$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:
#93 (Ljava/lang/Object;)Ljava/lang/Object;
#62 invokevirtual package/db/dto/RoleDTO.getName:()Ljava/lang/String;
#94 (Lpackage/db/dto/PermissionDTO;)Ljava/lang/String;
minor version: 0
major version: 52
flags: ACC_PUBLIC, ACC_SUPER
Constant pool:
#1 = String #132 // Some String
#2 = String #135 // Some String
#3 = String #137 // Some String
#4 = Class #156 // java/lang/Object
#5 = Class #157 // java/lang/String
#6 = Class #158 // java/lang/invoke/LambdaMetafactory
#7 = Class #159 // java/util/List
#8 = Class #160 // java/util/Set
#9 = Class #161 // java/util/stream/Collectors
#10 = Class #162 // java/util/stream/Stream
#11 = Class #165 // package/db/K
#12 = Class #166 // package/db/dto/NameDescriptionDTO
#13 = Class #167 // package/db/dto/RoleDTO
#14 = Class #168 // package/db/dto/UserDTO
#15 = Class #169 // package/web/security/impl/DefaultSecurityRealm
#16 = Class #170 // org/apache/commons/lang/StringUtils
#17 = Class #171 // org/apache/shiro/authc/AccountException
#18 = Class #172 // org/apache/shiro/authc/AuthenticationException
#19 = Class #173 // org/apache/shiro/authc/AuthenticationToken
#20 = Class #174 // org/apache/shiro/authc/SimpleAuthenticationInfo
#21 = Class #175 // org/apache/shiro/authc/UnknownAccountException
#22 = Class #176 // org/apache/shiro/authc/UsernamePasswordToken
#23 = Class #177 // org/apache/shiro/authz/SimpleAuthorizationInfo
#24 = Class #178 // org/apache/shiro/codec/Base64
#25 = Class #179 // org/apache/shiro/realm/AuthorizingRealm
#26 = Class #180 // org/apache/shiro/subject/PrincipalCollection
#27 = Class #181 // org/apache/shiro/util/SimpleByteSource
#28 = Class #182 // org/jooq/exception/DataAccessException
#29 = Fieldref #15.#92 // package/web/security/impl/DefaultSecurityRealm.userDAO:Lpackage/db/K;
#30 = Methodref #5.#78 // java/lang/String.format:(Ljava/lang/String;[Ljava/lang/Object;)Ljava/lang/String;
#31 = Methodref #6.#89 // 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;
#32 = Methodref #9.#91 // java/util/stream/Collectors.toSet:()Ljava/util/stream/Collector;
#33 = Methodref #12.#80 // package/db/dto/NameDescriptionDTO.getName:()Ljava/lang/String;
#34 = Methodref #13.#80 // package/db/dto/RoleDTO.getName:()Ljava/lang/String;
#35 = Methodref #14.#79 // package/db/dto/UserDTO.getId:()Ljava/util/UUID;
#36 = Methodref #14.#81 // package/db/dto/UserDTO.getPassword:()Ljava/lang/String;
#37 = Methodref #14.#83 // package/db/dto/UserDTO.getSalt:()Ljava/lang/String;
#38 = Methodref #15.#76 // package/web/security/impl/DefaultSecurityRealm.createSimpleAuthenticationInfo:(Ljava/lang/String;)Lorg/apache/shiro/authc/SimpleAuthenticationInfo;
#39 = Methodref #15.#80 // package/web/security/impl/DefaultSecurityRealm.getName:()Ljava/lang/String;
#40 = Methodref #15.#85 // package/web/security/impl/DefaultSecurityRealm.getUsername:(Lorg/apache/shiro/authc/UsernamePasswordToken;)Ljava/lang/String;
#41 = Methodref #16.#86 // org/apache/commons/lang/StringUtils.isBlank:(Ljava/lang/String;)Z
#42 = Methodref #16.#87 // org/apache/commons/lang/StringUtils.isNotBlank:(Ljava/lang/String;)Z
#43 = Methodref #17.#66 // org/apache/shiro/authc/AccountException."<init>":(Ljava/lang/String;)V
#44 = Methodref #18.#67 // org/apache/shiro/authc/AuthenticationException."<init>":(Ljava/lang/String;Ljava/lang/Throwable;)V
#45 = Methodref #20.#65 // org/apache/shiro/authc/SimpleAuthenticationInfo."<init>":(Ljava/lang/Object;Ljava/lang/Object;Lorg/apache/shiro/util/ByteSource;Ljava/lang/String;)V
#46 = Methodref #21.#66 // org/apache/shiro/authc/UnknownAccountException."<init>":(Ljava/lang/String;)V
#47 = Methodref #22.#84 // org/apache/shiro/authc/UsernamePasswordToken.getUsername:()Ljava/lang/String;
#48 = Methodref #23.#68 // org/apache/shiro/authz/SimpleAuthorizationInfo."<init>":(Ljava/util/Set;)V
#49 = Methodref #23.#72 // org/apache/shiro/authz/SimpleAuthorizationInfo.addStringPermissions:(Ljava/util/Collection;)V
#50 = Methodref #24.#77 // org/apache/shiro/codec/Base64.decode:(Ljava/lang/String;)[B
#51 = Methodref #25.#64 // org/apache/shiro/realm/AuthorizingRealm."<init>":()V
#52 = Methodref #27.#69 // org/apache/shiro/util/SimpleByteSource."<init>":([B)V
#53 = InterfaceMethodref #7.#90 // java/util/List.stream:()Ljava/util/stream/Stream;
#54 = InterfaceMethodref #10.#75 // java/util/stream/Stream.collect:(Ljava/util/stream/Collector;)Ljava/lang/Object;
#55 = InterfaceMethodref #10.#88 // java/util/stream/Stream.map:(Ljava/util/function/Function;)Ljava/util/stream/Stream;
#56 = InterfaceMethodref #11.#70 // package/db/K.a:(Ljava/lang/String;)Lpackage/db/dto/UserDTO;
#57 = InterfaceMethodref #11.#71 // package/db/K.a:(Ljava/util/UUID;)Ljava/util/List;
#58 = InterfaceMethodref #11.#74 // package/db/K.c:(Ljava/util/UUID;)Ljava/util/List;
#59 = InterfaceMethodref #26.#82 // org/apache/shiro/subject/PrincipalCollection.getPrimaryPrincipal:()Ljava/lang/Object;
#60 = InvokeDynamic #0:#73 // #0:apply:()Ljava/util/function/Function;
#61 = InvokeDynamic #1:#73 // #1:apply:()Ljava/util/function/Function;
#62 = MethodHandle #5:#34 // invokevirtual package/db/dto/RoleDTO.getName:()Ljava/lang/String;
#63 = MethodHandle #6:#31 // 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;
#64 = NameAndType #125:#102 // "<init>":()V
#65 = NameAndType #125:#104 // "<init>":(Ljava/lang/Object;Ljava/lang/Object;Lorg/apache/shiro/util/ByteSource;Ljava/lang/String;)V
#66 = NameAndType #125:#107 // "<init>":(Ljava/lang/String;)V
#67 = NameAndType #125:#110 // "<init>":(Ljava/lang/String;Ljava/lang/Throwable;)V
#68 = NameAndType #125:#114 // "<init>":(Ljava/util/Set;)V
#69 = NameAndType #125:#124 // "<init>":([B)V
#70 = NameAndType #138:#105 // a:(Ljava/lang/String;)Lpackage/db/dto/UserDTO;
#71 = NameAndType #138:#115 // a:(Ljava/util/UUID;)Ljava/util/List;
#72 = NameAndType #139:#113 // addStringPermissions:(Ljava/util/Collection;)V
#73 = NameAndType #140:#99 // apply:()Ljava/util/function/Function;
#74 = NameAndType #141:#115 // c:(Ljava/util/UUID;)Ljava/util/List;
#75 = NameAndType #142:#117 // collect:(Ljava/util/stream/Collector;)Ljava/lang/Object;
#76 = NameAndType #143:#106 // createSimpleAuthenticationInfo:(Ljava/lang/String;)Lorg/apache/shiro/authc/SimpleAuthenticationInfo;
#77 = NameAndType #144:#109 // decode:(Ljava/lang/String;)[B
#78 = NameAndType #147:#111 // format:(Ljava/lang/String;[Ljava/lang/Object;)Ljava/lang/String;
#79 = NameAndType #148:#98 // getId:()Ljava/util/UUID;
#80 = NameAndType #149:#97 // getName:()Ljava/lang/String;
#81 = NameAndType #150:#97 // getPassword:()Ljava/lang/String;
#82 = NameAndType #151:#96 // getPrimaryPrincipal:()Ljava/lang/Object;
#83 = NameAndType #152:#97 // getSalt:()Ljava/lang/String;
#84 = NameAndType #153:#97 // getUsername:()Ljava/lang/String;
#85 = NameAndType #153:#122 // getUsername:(Lorg/apache/shiro/authc/UsernamePasswordToken;)Ljava/lang/String;
#86 = NameAndType #154:#108 // isBlank:(Ljava/lang/String;)Z
#87 = NameAndType #155:#108 // isNotBlank:(Ljava/lang/String;)Z
#88 = NameAndType #163:#116 // map:(Ljava/util/function/Function;)Ljava/util/stream/Stream;
#89 = NameAndType #164:#112 // metafactory:(Ljava/lang/invoke/MethodHandles$Lookup;Ljava/lang/String;Ljava/lang/invoke/MethodType;Ljava/lang/invoke/MethodType;Ljava/lang/invoke/MethodHandle;Ljava/lang/invoke/MethodType;)Ljava/lang/invoke/CallSite;
#90 = NameAndType #184:#101 // stream:()Ljava/util/stream/Stream;
#91 = NameAndType #185:#100 // toSet:()Ljava/util/stream/Collector;
#92 = NameAndType #186:#134 // userDAO:Lpackage/db/K;
#93 = MethodType #103 // (Ljava/lang/Object;)Ljava/lang/Object;
#94 = MethodType #119 // (Lpackage/db/dto/PermissionDTO;)Ljava/lang/String;
#95 = MethodType #120 // (Lpackage/db/dto/RoleDTO;)Ljava/lang/String;
#96 = Utf8 ()Ljava/lang/Object;
#97 = Utf8 ()Ljava/lang/String;
#98 = Utf8 ()Ljava/util/UUID;
#99 = Utf8 ()Ljava/util/function/Function;
#100 = Utf8 ()Ljava/util/stream/Collector;
#101 = Utf8 ()Ljava/util/stream/Stream;
#102 = Utf8 ()V
#103 = Utf8 (Ljava/lang/Object;)Ljava/lang/Object;
#104 = Utf8 (Ljava/lang/Object;Ljava/lang/Object;Lorg/apache/shiro/util/ByteSource;Ljava/lang/String;)V
#105 = Utf8 (Ljava/lang/String;)Lpackage/db/dto/UserDTO;
#106 = Utf8 (Ljava/lang/String;)Lorg/apache/shiro/authc/SimpleAuthenticationInfo;
#107 = Utf8 (Ljava/lang/String;)V
#108 = Utf8 (Ljava/lang/String;)Z
#109 = Utf8 (Ljava/lang/String;)[B
#110 = Utf8 (Ljava/lang/String;Ljava/lang/Throwable;)V
#111 = Utf8 (Ljava/lang/String;[Ljava/lang/Object;)Ljava/lang/String;
#112 = Utf8 (Ljava/lang/invoke/MethodHandles$Lookup;Ljava/lang/String;Ljava/lang/invoke/MethodType;Ljava/lang/invoke/MethodType;Ljava/lang/invoke/MethodHandle;Ljava/lang/invoke/MethodType;)Ljava/lang/invoke/CallSite;
#113 = Utf8 (Ljava/util/Collection;)V
#114 = Utf8 (Ljava/util/Set;)V
#115 = Utf8 (Ljava/util/UUID;)Ljava/util/List;
#116 = Utf8 (Ljava/util/function/Function;)Ljava/util/stream/Stream;
#117 = Utf8 (Ljava/util/stream/Collector;)Ljava/lang/Object;
#118 = Utf8 (Lpackage/db/K;)V
#119 = Utf8 (Lpackage/db/dto/PermissionDTO;)Ljava/lang/String;
#120 = Utf8 (Lpackage/db/dto/RoleDTO;)Ljava/lang/String;
#121 = Utf8 (Lorg/apache/shiro/authc/AuthenticationToken;)Lorg/apache/shiro/authc/AuthenticationInfo;
#122 = Utf8 (Lorg/apache/shiro/authc/UsernamePasswordToken;)Ljava/lang/String;
#123 = Utf8 (Lorg/apache/shiro/subject/PrincipalCollection;)Lorg/apache/shiro/authz/AuthorizationInfo;
#124 = Utf8 ([B)V
#125 = Utf8 <init>
#126 = Utf8 BootstrapMethods
#127 = Utf8 Code
#128 = Utf8 ConstantValue
#129 = Utf8 EXCEPTION_ACCOUNT
#130 = Utf8 EXCEPTION_AUTHENTICATION_DATASOURCE
#131 = Utf8 EXCEPTION_UNKNOWN_ACCOUNT
#132 = Utf8 Empty usernames are not allowed.
#133 = Utf8 Ljava/lang/String;
#134 = Utf8 Lpackage/db/K;
#135 = Utf8 No account found for user [%s].
#136 = Utf8 StackMapTable
#137 = Utf8 There was a SQL error while authenticating user [%s].
#138 = Utf8 a
#139 = Utf8 addStringPermissions
#140 = Utf8 apply
#141 = Utf8 c
#142 = Utf8 collect
#143 = Utf8 createSimpleAuthenticationInfo
#144 = Utf8 decode
#145 = Utf8 doGetAuthenticationInfo
#146 = Utf8 doGetAuthorizationInfo
#147 = Utf8 format
#148 = Utf8 getId
#149 = Utf8 getName
#150 = Utf8 getPassword
#151 = Utf8 getPrimaryPrincipal
#152 = Utf8 getSalt
#153 = Utf8 getUsername
#154 = Utf8 isBlank
#155 = Utf8 isNotBlank
#156 = Utf8 java/lang/Object
#157 = Utf8 java/lang/String
#158 = Utf8 java/lang/invoke/LambdaMetafactory
#159 = Utf8 java/util/List
#160 = Utf8 java/util/Set
#161 = Utf8 java/util/stream/Collectors
#162 = Utf8 java/util/stream/Stream
#163 = Utf8 map
#164 = Utf8 metafactory
#165 = Utf8 package/db/K
#166 = Utf8 package/db/dto/NameDescriptionDTO
#167 = Utf8 package/db/dto/RoleDTO
#168 = Utf8 package/db/dto/UserDTO
#169 = Utf8 package/web/security/impl/DefaultSecurityRealm
#170 = Utf8 org/apache/commons/lang/StringUtils
#171 = Utf8 org/apache/shiro/authc/AccountException
#172 = Utf8 org/apache/shiro/authc/AuthenticationException
#173 = Utf8 org/apache/shiro/authc/AuthenticationToken
#174 = Utf8 org/apache/shiro/authc/SimpleAuthenticationInfo
#175 = Utf8 org/apache/shiro/authc/UnknownAccountException
#176 = Utf8 org/apache/shiro/authc/UsernamePasswordToken
#177 = Utf8 org/apache/shiro/authz/SimpleAuthorizationInfo
#178 = Utf8 org/apache/shiro/codec/Base64
#179 = Utf8 org/apache/shiro/realm/AuthorizingRealm
#180 = Utf8 org/apache/shiro/subject/PrincipalCollection
#181 = Utf8 org/apache/shiro/util/SimpleByteSource
#182 = Utf8 org/jooq/exception/DataAccessException
#183 = Utf8 setUserDAO
#184 = Utf8 stream
#185 = Utf8 toSet
#186 = Utf8 userDAO
{
protected org.apache.shiro.authz.AuthorizationInfo doGetAuthorizationInfo(org.apache.shiro.subject.PrincipalCollection);
descriptor: (Lorg/apache/shiro/subject/PrincipalCollection;)Lorg/apache/shiro/authz/AuthorizationInfo;
flags: ACC_PROTECTED
Code:
stack=3, locals=6, args_size=2
0: aload_1
1: invokeinterface #59, 1 // InterfaceMethod org/apache/shiro/subject/PrincipalCollection.getPrimaryPrincipal:()Ljava/lang/Object;
6: checkcast #14 // class package/db/dto/UserDTO
9: astore_2
10: aload_0
11: getfield #29 // Field userDAO:Lpackage/db/K;
14: aload_2
15: invokevirtual #35 // Method package/db/dto/UserDTO.getId:()Ljava/util/UUID;
18: invokeinterface #57, 2 // InterfaceMethod package/db/K.a:(Ljava/util/UUID;)Ljava/util/List;
23: invokeinterface #53, 1 // InterfaceMethod java/util/List.stream:()Ljava/util/stream/Stream;
28: invokedynamic #60, 0 // InvokeDynamic #0:apply:()Ljava/util/function/Function;
33: invokeinterface #55, 2 // InterfaceMethod java/util/stream/Stream.map:(Ljava/util/function/Function;)Ljava/util/stream/Stream;
38: invokestatic #32 // Method java/util/stream/Collectors.toSet:()Ljava/util/stream/Collector;
41: invokeinterface #54, 2 // InterfaceMethod java/util/stream/Stream.collect:(Ljava/util/stream/Collector;)Ljava/lang/Object;
46: checkcast #8 // class java/util/Set
49: astore_3
50: new #23 // class org/apache/shiro/authz/SimpleAuthorizationInfo
53: dup
54: aload_3
55: invokespecial #48 // Method org/apache/shiro/authz/SimpleAuthorizationInfo."<init>":(Ljava/util/Set;)V
58: astore 4
60: aload_0
61: getfield #29 // Field userDAO:Lpackage/db/K;
64: aload_2
65: invokevirtual #35 // Method package/db/dto/UserDTO.getId:()Ljava/util/UUID;
68: invokeinterface #58, 2 // InterfaceMethod package/db/K.c:(Ljava/util/UUID;)Ljava/util/List;
73: invokeinterface #53, 1 // InterfaceMethod java/util/List.stream:()Ljava/util/stream/Stream;
78: invokedynamic #61, 0 // InvokeDynamic #1:apply:()Ljava/util/function/Function;
83: invokeinterface #55, 2 // InterfaceMethod java/util/stream/Stream.map:(Ljava/util/function/Function;)Ljava/util/stream/Stream;
88: invokestatic #32 // Method java/util/stream/Collectors.toSet:()Ljava/util/stream/Collector;
91: invokeinterface #54, 2 // InterfaceMethod java/util/stream/Stream.collect:(Ljava/util/stream/Collector;)Ljava/lang/Object;
96: checkcast #8 // class java/util/Set
99: astore 5
101: aload 4
103: aload 5
105: invokevirtual #49 // Method org/apache/shiro/authz/SimpleAuthorizationInfo.addStringPermissions:(Ljava/util/Collection;)V
108: aload 4
110: areturn
}
更新
我们已经转移到http://www.zelix.com/klassmaster/进行混淆。商业，但它确实适用于所有Java 8功能。 （我不隶属于。）
答案 0 :(得分：6)
原始BootstrapMethods属性
BootstrapMethods:
0: #141 invokestatic java/lang/invoke/LambdaMetafactory.metafactory:(Ljava/lang/invoke/MethodHandles$Lookup;Ljava/lang/String;Ljava/lang/invoke/MethodType;Ljava/lang/invoke/MethodType;Ljava/lang/invoke/MethodHandle;Ljava/lang/invoke/MethodType;)Ljava/lang/invoke/CallSite;
Method arguments:
#142 (Ljava/lang/Object;)Ljava/lang/Object;
#143 invokevirtual package/db/dto/RoleDTO.getName:()Ljava/lang/String;
#144 (Lpackage/db/dto/RoleDTO;)Ljava/lang/String;
1: #141 invokestatic java/lang/invoke/LambdaMetafactory.metafactory:(Ljava/lang/invoke/MethodHandles$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:
#142 (Ljava/lang/Object;)Ljava/lang/Object;
#155 invokevirtual package/db/dto/NameDescriptionDTO.getName:()Ljava/lang/String;
#156 (Lpackage/db/dto/PermissionDTO;)Ljava/lang/String;
两个条目都指向不同的目标方法。您清楚地看到#143 invokevirtual … RoleDTO.getName和#155 invokevirtual … NameDescriptionDTO.getName;这两个参数对应于bootstrap方法的implMethod参数
metafactory(caller, invokedName, invokedType, samMethodType, implMethod, instantiatedMethodType)
相反，在混淆的类“BootstrapMethods属性
BootstrapMethods:
0: #63 invokestatic java/lang/invoke/LambdaMetafactory.metafactory:(Ljava/lang/invoke/MethodHandles$Lookup;Ljava/lang/String;Ljava/lang/invoke/MethodType;Ljava/lang/invoke/MethodType;Ljava/lang/invoke/MethodHandle;Ljava/lang/invoke/MethodType;)Ljava/lang/invoke/CallSite;
Method arguments:
#93 (Ljava/lang/Object;)Ljava/lang/Object;
#62 invokevirtual package/db/dto/RoleDTO.getName:()Ljava/lang/String;
#95 (Lpackage/db/dto/RoleDTO;)Ljava/lang/String;
1: #63 invokestatic java/lang/invoke/LambdaMetafactory.metafactory:(Ljava/lang/invoke/MethodHandles$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:
#93 (Ljava/lang/Object;)Ljava/lang/Object;
#62 invokevirtual package/db/dto/RoleDTO.getName:()Ljava/lang/String;
#94 (Lpackage/db/dto/PermissionDTO;)Ljava/lang/String;
两个条目都引用完全相同的目标方法#62 invokevirtual … RoleDTO.getName。
所以混淆器在这里进行了语义转换，我猜这是Proguard中的一个错误。 JRE在拒绝调用时是正确的，因为最后一个条目仍然请求功能签名(PermissionDTO)String但是希望将其链接到具有功能签名RoleDTO.getName和{{1}的目标方法(RoleDTO)String无法分配给PermissionDTO（这正是消息所说的内容）。