问题
I have decided to take on MCP and have downloaded it, however, when running the decompile.bat, it returns an error.
(I'm running 32-bit Windows 10)
Here is what it returned:
'"C:\Program Files\Java\jdk1.8.0_65\bin\java" -jar runtime\bin\fernflower.jar -din=1 -rbr=1 -dgs=1 -asc=1 -rsy=1 -iec=1 -jvn=1 -log=WARN "-e=jars\libraries\net/java/jinput\jinput\2.0.5\jinput-2.0.5.jar" "-e=jars\libraries\org/lwjgl/lwjgl\lwjgl-platform\2.9.4-nightly-20150209\lwjgl-platform-2.9.4-nightly-20150209-natives-windows.jar" "-e=jars\libraries\com/ibm/icu\icu4j-core-mojang\51.2\icu4j-core-mojang-51.2.jar" "-e=jars\libraries\tv/twitch\twitch-external-platform\4.5\twitch-external-platform-4.5-natives-windows-32.jar" "-e=jars\libraries\org/apache/httpcomponents\httpcore\4.3.2\httpcore-4.3.2.jar" "-e=jars\libraries\org/apache/logging/log4j\log4j-api\2.0-beta9\log4j-api-2.0-beta9.jar" "-e=jars\libraries\org/apache/commons\commons-lang3\3.3.2\commons-lang3-3.3.2.jar" "-e=jars\libraries\net/java/jutils\jutils\1.0.0\jutils-1.0.0.jar" "-e=jars\libraries\net/java/dev/jna\jna\3.4.0\jna-3.4.0.jar" "-e=jars\libraries\com/paulscode\libraryjavasound\20101123\libraryjavasound-20101123.jar" "-e=jars\libraries\net/sf/jopt-simple\jopt-simple\4.6\jopt-simple-4.6.jar" "-e=jars\libraries\com/google/guava\guava\17.0\guava-17.0.jar" "-e=jars\libraries\oshi-project\oshi-core\1.1\oshi-core-1.1.jar" "-e=jars\libraries\commons-logging\commons-logging\1.1.3\commons-logging-1.1.3.jar" "-e=jars\libraries\org/apache/commons\commons-compress\1.8.1\commons-compress-1.8.1.jar" "-e=jars\libraries\net/java/dev/jna\platform\3.4.0\platform-3.4.0.jar" "-e=jars\libraries\com/paulscode\codecjorbis\20101023\codecjorbis-20101023.jar" "-e=jars\libraries\com/paulscode\soundsystem\20120107\soundsystem-20120107.jar" "-e=jars\libraries\com/paulscode\librarylwjglopenal\20100824\librarylwjglopenal-20100824.jar" "-e=jars\libraries\org/lwjgl/lwjgl\lwjgl_util\2.9.4-nightly-20150209\lwjgl_util-2.9.4-nightly-20150209.jar" "-e=jars\libraries\commons-codec\commons-codec\1.9\commons-codec-1.9.jar" "-e=jars\libraries\org/apache/httpcomponents\httpclient\4.3.3\httpclient-4.3.3.jar" "-e=jars\libraries\org/lwjgl/lwjgl\lwjgl\2.9.4-nightly-20150209\lwjgl-2.9.4-nightly-20150209.jar" "-e=jars\libraries\commons-io\commons-io\2.4\commons-io-2.4.jar" "-e=jars\libraries\com/mojang\realms\1.7.39\realms-1.7.39.jar" "-e=jars\libraries\com/mojang\authlib\1.5.21\authlib-1.5.21.jar" "-e=jars\libraries\com/google/code/gson\gson\2.2.4\gson-2.2.4.jar" "-e=jars\libraries\tv/twitch\twitch\6.5\twitch-6.5.jar" "-e=jars\libraries\com/paulscode\codecwav\20101023\codecwav-20101023.jar" "-e=jars\libraries\tv/twitch\twitch-platform\6.5\twitch-platform-6.5-natives-windows-32.jar" "-e=jars\libraries\net/java/jinput\jinput-platform\2.0.5\jinput-platform-2.0.5-natives-windows.jar" "-e=jars\libraries\org/apache/logging/log4j\log4j-core\2.0-beta9\log4j-core-2.0-beta9.jar" "-e=jars\libraries\io/netty\netty-all\4.0.23.Final\netty-all-4.0.23.Final.jar" temp/minecraft_ff_in.jar temp\src\minecraft' failed : 1 Decompile failed
回答1:
This is caused by the decompilation system running out of RAM. I'm not entirely sure why it's happening, but it also was happening to me.
If you're using Minecraft Forge's ForgeGradle, see this. You can either edit the gradle options file ( .gradle/gradle.properties in your user folder) and add org.gradle.jvmargs=-Xmx2G to it, or you can set the options variable to -Xmx2G (in a command prompt, run set GRADLE_OPTS=-Xmx2G and then gradlew setupDecompWorkspace).
However, given that you referenced decompile.bat, you probably are using MCP without Forge. (Which is fine but forge does make mods easier/more compatible; you may want to consider doing this if you're making a more permanent mod rather than just messing about.) In this case, you can edit MCP's configuration to increase the given RAM.
In the MCP folder, open the conf folder and then open mcp.cfg with a text editor of your choice. Then, find this line (near the bottom)
CmdFernflower = %s -jar %s -din=1 -rbr=0 -dgs=1 -asc=1 -log=WARN {indir} {outdir}
and replace it with this:
CmdFernflower = %s -Xmx2G -jar %s -din=1 -rbr=0 -dgs=1 -asc=1 -log=WARN {indir} {outdir}
(You may need to change other lines also adding -Xmx2G before -jar but it doesn't seem to be needed from my experience).
This will run the decompiler with additional RAM.
Alternatively, if you don't want to mess around with the MCP configuration, MCP910 doesn't seem to have this issue. It works with 1.8.0 instead of 1.8.8, but should still do everything you want.
回答2:
I know, this answer comes very late, but you should install the 64-bit Version of Java. With the 32-Bit Version, it doesn't work... I don't know if you can install this on your 32-Bit System, but you can try it. On my 86-Bit System (Windows 8) it works!
来源：https://stackoverflow.com/questions/34969224/decompiling-mcp-error-version-9-18-returns-decompile-failed