AOSP art.module.platform.api.stubs编译失败(NaN java错误)

Question

Failed to build aosp
[  0% 18/12890] //libcore/mmodules/core_platform_api:art.module.platform.api.stubs javac [common]
FAILED: out/soong/.intermediates/libcore/mmodules/core_platform_api/art.module.platform.api.stubs/android_common/javac/art.module.platform.api.stubs.jar

out/soong/.intermediates/libcore/mmodules/core_platform_api/art.module.platform.api.stubs/android_common/javac/srcjars/java/lang/Double.java:106: error: self-reference in initializer
public static final double NaN = NaN;
                                 ^
out/soong/.intermediates/libcore/mmodules/core_platform_api/art.module.platform.api.stubs/android_common/javac/srcjars/java/lang/Float.java:108: error: cannot find symbol
public static final float NaN = NaNf;
                                ^
  symbol:   variable NaNf   
  location: class Float
2 errors

在每个文件中，Double.java文件NaN = 0.0d / 0.0；在我试图修改这些文件之后，生成具有相同错误的重新生成它们。这些文件在源文件中的位置以及如何修复这些错误？谢谢你的回答。

Answer 1

它们是从元宝里运来的。

文件src/main/java/com/android/tools/metalava/model/FieldItem.kt

我敢打赌您已经更新了kotlinc，所以代码现在不像预期的那样工作了。这里有两个部分。一个双倍，一个浮子。这两种方法在kotlin 1.5+中都不像预期的那样工作

所以你应该换掉

is Float -> {
  writer.print(" = ")
  when (value) {
     Float.POSITIVE_INFINITY -> writer.print("(1.0f/0.0f);")
     Float.NEGATIVE_INFINITY -> writer.print("(-1.0f/0.0f);")
     Float.NaN -> writer.print("(0.0f/0.0f);")
  }
}

通过

is Float -> {
  writer.print(" = ")
  when {
    value == Float.POSITIVE_INFINITY -> writer.print("(1.0f/0.0f);")
    value == Float.NEGATIVE_INFINITY -> writer.print("(-1.0f/0.0f);")
    java.lang.Float.isNaN(value) -> writer.print("(0.0f/0.0f);")
    else -> { 
      writer.print(canonicalizeFloatingPointString(value.toString()))
      writer.print("f;")
    }
  }
}

相同的双，替换块

 is Double -> {
   writer.print(" = ")
   when (value) {
     Double.POSITIVE_INFINITY -> writer.print("(1.0/0.0);")
     Double.NEGATIVE_INFINITY -> writer.print("(-1.0/0.0);")
     Double.NaN -> writer.print("(0.0/0.0);")
     else -> { 
       writer.print(canonicalizeFloatingPointString(value.toString()))
       writer.print(";")
     }
   }
 }

通过

 is Double -> {
     writer.print(" = ")
     when {
         value == Double.POSITIVE_INFINITY -> writer.print("(1.0/0.0);")
         value == Double.NEGATIVE_INFINITY -> writer.print("(-1.0/0.0);")
         java.lang.Double.isNaN(value) -> writer.print("(0.0/0.0);")
         else -> {
             writer.print(canonicalizeFloatingPointString(value.toString()))
             writer.print(";")
         }
     }
 }