GHC：双重转换-0.2.0.1 未知符号
我正在尝试使用最新版本的 EclipseFP。启动后，scion-browser 设置会初始化，一切顺利，直到尝试安装 scion-browser-0.1。我在 Eclipse 控制台中收到以下错误：
...
Loading package double-conversion-0.2.0.1 ... linking ... ghc: /home/dpm/.cabal/lib/double-conversion-0.2.0.1/ghc-7.0.3/HSdouble-conversion-0.2.0.1.o: unknown symbol `_ZNK17double_conversion6Double5valueEv'
ghc: unable to load package `double-conversion-0.2.0.1'
cabal: Error: some packages failed to install:
scion-browser-0.1 failed during the building phase. The exception was:
ExitFailure 1
显然，ghc-pkg 似乎认为此包一切正常（ghc-pkg 检查不打印任何内容）。通过阴谋集团重新安装双转换也没有任何改变。有人知道发生了什么事吗？我使用的是 Haskell 平台的 Ubuntu 9.10 Linux、GHC 7.0.3。
I'm trying to use the latest release of EclipseFP. Upon start, the scion-browser setup initializes, with everything going well until trying to install scion-browser-0.1. I get the following error in my Eclipse console:
...
Loading package double-conversion-0.2.0.1 ... linking ... ghc: /home/dpm/.cabal/lib/double-conversion-0.2.0.1/ghc-7.0.3/HSdouble-conversion-0.2.0.1.o: unknown symbol `_ZNK17double_conversion6Double5valueEv'
ghc: unable to load package `double-conversion-0.2.0.1'
cabal: Error: some packages failed to install:
scion-browser-0.1 failed during the building phase. The exception was:
ExitFailure 1
Apparently, ghc-pkg seems to think everything is OK with this package (ghc-pkg check prints nothing). Reinstalling double-conversion through cabal also changes nothing. Anybody any idea what's going on? I'm on Ubuntu 9.10 Linux, GHC 7.0.3 from the Haskell-Platform.
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如此处所示：
关闭 Eclipse 并在终端中运行此命令：
然后重新启动 Eclipse。
As indicated here :
close your eclipse and run this in your terminal:
then, restart your eclipse.