方法签名的 Proguard 错误

Question

我在尝试制作 Android 应用程序的 Proguard 版本时遇到奇怪的错误。错误是：

[proguard] Optimizing...  [proguard]
Unexpected error while evaluating
instruction:  [proguard]   Class      
= [net/domain/packagename/service/ExifEditor]
[proguard]   Method      =
[setGpsLocation(DDDJ)V]  [proguard]  
Instruction = [294] aload_3 v3 
[proguard]   Exception   =
[java.lang.IllegalArgumentException]
(Value is not a reference value
[proguard.evaluation.value.UnknownDoubleValue])
[proguard] Unexpected error while
performing partial evaluation: 
[proguard]   Class       =
[net/domain/packagename/service/ExifEditor]
[proguard]   Method      =
[setGpsLocation(DDDJ)V]  [proguard]  
Exception   =
[java.lang.IllegalArgumentException]
(Value is not a reference value
[proguard.evaluation.value.UnknownDoubleValue])

BUILD FAILED
D:\sdk\google\android-sdk-windows\tools\ant\main_rules.xml:430: java.lang.IllegalArgumentException:
Value is not a reference value
[proguard.evaluation.value.UnknownDoubleValue]
        at proguard.evaluation.value.Value.referenceValue(Value.java:97)
        at proguard.evaluation.Variables.aload(Variables.java:264)
        at proguard.evaluation.Processor.visitVariableInstruction(Processor.java:677)
        at proguard.classfile.instruction.VariableInstruction.accept(VariableInstruction.java:306)
        at proguard.optimize.evaluation.PartialEvaluator.evaluateSingleInstructionBlock(PartialEvaluator.java:729)
        at proguard.optimize.evaluation.PartialEvaluator.evaluateInstructionBlock(PartialEvaluator.java:560)
        at proguard.optimize.evaluation.PartialEvaluator.evaluateInstructionBlockAndExceptionHandlers(PartialEvaluator.java:533)
...and so on...

方法“setGpsLocation”具有以下签名：

public void setGpsLocation(double longitude, double latitude, double altitude, long gpsTime) throws IOException

我最终通过将方法更改为这样来摆脱错误：

public void setGpsLocation(Location location)

并且错误消失了。虽然这让我过去了，但我不明白第一个方法签名出了什么问题。我的 proguard.cfg 有 -optimizationpasses 2。如果我将此值增加到 3 或更多，我就会开始在其他代码区域看到类似的错误。如果我使用 3，会发生以下情况：

[proguard] Optimizing...   [proguard]
Unexpected error while evaluating
instruction:   [proguard]   Class     
= [org/apache/commons/fileupload/util/Streams]
[proguard]   Method      =
[copy(Ljava/io/InputStream;Ljava/io/OutputStream;Z[B)J]
[proguard]   Instruction = [75]
aload_2 v2   [proguard]   Exception  
= [java.lang.IllegalArgumentException] (Value is not a reference value
[proguard.evaluation.value.UnknownIntegerValue])
[proguard] Unexpected error while
performing partial evaluation: 
[proguard]   Class       =
[org/apache/commons/fileupload/util/Streams]
[proguard]   Method      =
[copy(Ljava/io/InputStream;Ljava/io/OutputStream;Z[B)J]
[proguard]   Exception   =
[java.lang.IllegalArgumentException]
(Value is not a reference value
[proguard.evaluation.value.UnknownIntegerValue])

我很难找到有关此错误含义的信息。

还有其他人见过类似的东西吗？

更新

虽然更改签名似乎可以解决问题，但我遇到了运行时崩溃：

I/dalvikvm(30523): Could not find method a.b.a.b.d.b, referenced from method a.b.a.b.d.a
W/dalvikvm(30523): VFY: unable to resolve direct method 440: La/b/a/b/d;.b (Ljava/lang/String;[BII)La/b/a/b/a;
D/dalvikvm(30523): VFY: replacing opcode 0x70 at 0x0039
D/dalvikvm(30523): VFY: dead code 0x003c-0041 in La/b/a/b/d;.a (Ljava/lang/String;[BII)[La/b/a/b/a;
W/dalvikvm(30523): VFY: 'this' arg 'Ljava/lang/Object;' not instance of 'Ljava/io/InputStream;'
W/dalvikvm(30523): VFY:  rejecting opcode 0x6e at 0x0045
W/dalvikvm(30523): VFY:  rejected La/b/a/a/a/b;.a (La/b/a/b/a/a;La/b/a/a;)La/b/a/a/a/c;
W/dalvikvm(30523): Verifier rejected class La/b/a/a/a/b;
W/dalvikvm(30523): threadid=10: thread exiting with uncaught exception (group=0x400259f8)

我开始阅读更多 Proguard 手册，发现通过添加 -dontoptimize，构建时错误和运行时崩溃消失了离开。这有点违背了使用 Proguard 的目的，不是吗？

-凯文

Answer 1

该错误表明 ProGuard 的优化步骤存在错误。您应该确保您使用的是最新版本（在撰写本文时为 ProGuard 4.5.1 或 4.6 beta3）。如果问题仍然存在，您应该在 ProGuard 错误跟踪器中提交错误报告，并提供一个可以重现问题的小示例项目。

Answer 2

请参考以下链接

• Error: Can't find common super class of