Scala中的錯誤Maven重新編譯時無需更改代碼

Question

當我檢出https://github.com/alexeyr/scala-time並使用Maven構建一次時，一切正常。然後我觸摸src/main/scala/org/scala_tools/time/Implicits.scala來觸發重新編譯。再次運行mvn compile，我也得到類似

[ERROR] F:\MyProgramming\scala-time\src\main\scala\org\scala_tools\time\StaticDateTime.scala:29: error: value second is not a member of Int 
[ERROR] def nextSecond = now + 1.second 

56個錯誤，但是似乎沒有看到感動文件中定義，並與import org.scala_tools.time.Implicits._進口implicits。但同時我沒有錯誤object Implicits is not a member of package org.scala_tools.time，正如我期望在這種情況下看到的那樣。

mvn clean之後它可以被編譯一次而沒有錯誤再次。

1. 有人能重現嗎？

2. 如果是，我該如何解決？

UPDATE：這也恰好與SBT，但只有當Implicits.scala實際上改變足以產生不同的類文件（例如添加一行object Implicits2 extends Implicits）。而這組錯誤是不同的！

Answer 1

我可以重新創建錯誤，而不maven，所以它看起來像這可能是同是如何被使用scalac的問題（或scalac錯誤）：

% rm -rf target 
% mkdir -p target/classes 
% cat scalac-args | sed "s;~;$HOME;g" | xargs scalac-2.9 # runs successfully 
% cat scalac-args | sed "s;~;$HOME;g" | xargs scalac-2.9 
#... 
56 errors found 

（該sed命令只是解決了scalac-args的.m2目錄）

哪裏scalac-args是

-target:jvm-1.5 
-classpath 
~/.m2/repository/org/scala-lang/scala-library/2.9.1-1/scala-library-2.9.1-1.jar:~/.m2/repository/org/joda/joda-convert/1.2/joda-convert-1.2.jar:~/.m2/repository/joda-time/joda-time/2.1/joda-time-2.1.jar:target/classes 
-d 
target/classes 
src/main/scala/org/scala_tools/time/DurationBuilder.scala 
src/main/scala/org/scala_tools/time/Implicits.scala 
src/main/scala/org/scala_tools/time/Imports.scala 
src/main/scala/org/scala_tools/time/RichAbstractDateTime.scala 
src/main/scala/org/scala_tools/time/RichAbstractInstant.scala 
src/main/scala/org/scala_tools/time/RichAbstractPartial.scala 
src/main/scala/org/scala_tools/time/RichAbstractReadableInstantFieldProperty.scala 
src/main/scala/org/scala_tools/time/RichChronology.scala 
src/main/scala/org/scala_tools/time/RichDate.scala 
src/main/scala/org/scala_tools/time/RichDateMidnight.scala 
src/main/scala/org/scala_tools/time/RichDateTime.scala 
src/main/scala/org/scala_tools/time/RichDateTimeFormatter.scala 
src/main/scala/org/scala_tools/time/RichDateTimeProperty.scala 
src/main/scala/org/scala_tools/time/RichDateTimeZone.scala 
src/main/scala/org/scala_tools/time/RichDuration.scala 
src/main/scala/org/scala_tools/time/RichInstant.scala 
src/main/scala/org/scala_tools/time/RichInt.scala 
src/main/scala/org/scala_tools/time/RichLocalDate.scala 
src/main/scala/org/scala_tools/time/RichLocalDateProperty.scala 
src/main/scala/org/scala_tools/time/RichLocalDateTime.scala 
src/main/scala/org/scala_tools/time/RichLocalDateTimeProperty.scala 
src/main/scala/org/scala_tools/time/RichLocalTime.scala 
src/main/scala/org/scala_tools/time/RichLocalTimeProperty.scala 
src/main/scala/org/scala_tools/time/RichLong.scala 
src/main/scala/org/scala_tools/time/RichMonthDay.scala 
src/main/scala/org/scala_tools/time/RichMonthDayProperty.scala 
src/main/scala/org/scala_tools/time/RichPartial.scala 
src/main/scala/org/scala_tools/time/RichPartialProperty.scala 
src/main/scala/org/scala_tools/time/RichPeriod.scala 
src/main/scala/org/scala_tools/time/RichReadableDateTime.scala 
src/main/scala/org/scala_tools/time/RichReadableDuration.scala 
src/main/scala/org/scala_tools/time/RichReadableInstant.scala 
src/main/scala/org/scala_tools/time/RichReadableInterval.scala 
src/main/scala/org/scala_tools/time/RichReadablePartial.scala 
src/main/scala/org/scala_tools/time/RichReadablePeriod.scala 
src/main/scala/org/scala_tools/time/RichYearMonth.scala 
src/main/scala/org/scala_tools/time/RichYearMonthProperty.scala 
src/main/scala/org/scala_tools/time/StaticDateTime.scala 
src/main/scala/org/scala_tools/time/StaticDateTimeFormat.scala 
src/main/scala/org/scala_tools/time/StaticDateTimeZone.scala 
src/main/scala/org/scala_tools/time/StaticDuration.scala 
src/main/scala/org/scala_tools/time/StaticInterval.scala 
src/main/scala/org/scala_tools/time/StaticLocalDate.scala 
src/main/scala/org/scala_tools/time/StaticLocalDateTime.scala 
src/main/scala/org/scala_tools/time/StaticLocalTime.scala 
src/main/scala/org/scala_tools/time/StaticPartial.scala 
src/main/scala/org/scala_tools/time/StaticPeriod.scala 

以及適當的罐子已經被下載。

如果我用參數替換target/classes與target/classes/org/scala_tools/time/，那麼它工作正常。

% rm -rf target 
% mkdir -p target/classes 
% cat scalac-args | sed "s;~;$HOME;g" | xargs scalac-2.9 # runs successfully 
% cat scalac-args | sed "s;~;$HOME;g" | xargs scalac-2.9 # runs successfully 

所以它看起來像maven-scala-plugin預計給出的路徑上的目錄時scalac在封裝相應的子目錄的樣子，但scalac沒有這樣做。我不確定誰錯了。

Answer 2

Unsatisfying fix：rm -rf target; MVN編譯 - 風鈴草10小時前

沒用的修復，因爲他可以做mvn clean compile - 這將是跨平臺解決方案:)