在升级现有应用程序（最近升级并使用 Grails 2.2.4）时，我升级了应用程序的两个组件中使用的公共模块（称为 myApp-common）。这进展顺利，但是当我尝试升级第一个依赖模块时，我在运行“grails upgrade”命令时收到了附加的堆栈跟踪。
| 环境设置为开发......
WARNING: This target will upgrade an older Grails application to 2.3.0. Are you sure you want to continue? [y,n] y| 执行 myApp-common 插件升级脚本 | 错误执行脚本时出错升级：org.codehaus.groovy.control.MultipleCompilationErrorsException：启动失败：解析期间出现一般错误：未找到四位十六进制字符代码。行：1 列：20
groovyjarjarantlr.TokenStreamIOException：找不到四位十六进制字符代码。行：1 col:20 at org.codehaus.groovy.antlr.parser.GroovyLexer.nextToken(GroovyLexer.java:723) at org.codehaus.groovy.antlr.parser.GroovyLexer$1.nextToken(GroovyLexer.java:258) at groovyjarjarantlr.TokenBuffer.fill(TokenBuffer.java:69) 在 groovyjarjarantlr.TokenBuffer.LA(TokenBuffer.java:80) 在 groovyjarjarantlr.LLkParser.LA(LLkParser.java:52) 在 org.codehaus.groovy.antlr.parser.GroovyRecognizer .nls(GroovyRecognizer.java:793) 在 org.codehaus.groovy.antlr.parser.GroovyRecognizer.varInitializer(GroovyRecognizer.java:2681) 在 org.codehaus.groovy.antlr.parser.GroovyRecognizer.variableDeclarator(GroovyRecognizer.java:7928) ) 在 org.codehaus.groovy.antlr.parser.GroovyRecognizer。
1 个错误（使用 --stacktrace 查看完整跟踪）
经过一番谷歌搜索，看起来这与一个已知问题有关，即在代码中包含 \u 时没有后跟十六进制代码。删除所有实例后，它仍然给出了相同的错误。接下来，我将代码当时所在的工作区从 C:\unique_workspace\Iteration21 更改为 C:\x_unique_workspace\Iteration21 以删除工作区地址中的 \u。这样做并再次尝试升级会导致此堆栈跟踪：
| 环境设置为开发......
WARNING: This target will upgrade an older Grails application to 2.3.0. Are you sure you want to continue? [y,n] y| 执行 myApp-common 插件升级脚本 | 错误执行脚本升级错误：org.codehaus.groovy.control.MultipleCompilationErrorsException：启动失败：
Script1.groovy: 1: unexpected char: '\' @ line 1, column 20.
def pluginDir = 'C:\x_unique_workspace\Iteration21\myApp-common'
^
1 个错误（注意：堆栈跟踪已被过滤。使用 --verbose 查看整个跟踪。） org.codehaus.groovy.control.MultipleCompilationErrorsException：启动失败：
Script1.groovy: 1: unexpected char: '\' @ line 1, column 20.
def pluginDir = 'C:\x_unique_workspace\Iteration21\myApp-common'
^
1 个错误
at org.codehaus.gant.IncludeTargets.leftShift(IncludeTargets.groovy:72) at Upgrade$_run_closure1.doCall(Upgrade.groovy:229) at org.codehaus.gant.GantMetaClass.invokeMethod(GantMetaClass.java:133) at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16_closure18.doCall(GantBinding.groovy:185) at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16_closure18.doCall(GantBinding.groovy) at org.codehaus.gant.GantBinding.withTargetEvent(GantBinding.groovy:90) at org.codehaus.gant.GantBinding.this$4$withTargetEvent(GantBinding.groovy) at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16.doCall(GantBinding.groovy:185) at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16.doCall(GantBinding.groovy) at org.codehaus.gant.GantMetaClass.processClosure(GantMetaClass.java:81) at org.codehaus.gant.GantMetaClass.processArgument(GantMetaClass.java:95) at org.codehaus.gant.GantMetaClass.invokeMethod(GantMetaClass.java:128) at Upgrade$_run_closure2.doCall(Upgrade.groovy:239) at org.codehaus.gant.GantMetaClass.invokeMethod(GantMetaClass.java:133) at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16_closure18.doCall(GantBinding.groovy:185) at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16_closure18.doCall(GantBinding.groovy) at org.codehaus.gant.GantBinding.withTargetEvent(GantBinding.groovy:90) at org.codehaus.gant.GantBinding.this$4$withTargetEvent(GantBinding.groovy) at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16.doCall(GantBinding.groovy:185) at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16.doCall(GantBinding.groovy) at gant.Gant$_dispatch_closure5.doCall(Gant.groovy:381) at gant.Gant$_dispatch_closure7.doCall(Gant.groovy:415) at gant.Gant$_dispatch_closure7.doCall(Gant.groovy) at gant.Gant.withBuildListeners(Gant.groovy:427) at gant.Gant.this$2$withBuildListeners(Gant.groovy) at gant.Gant$this$2$withBuildListeners.callCurrent(Unknown Source) at gant.Gant.dispatch(Gant.groovy:415) at gant.Gant.this$2$dispatch(Gant.groovy) at gant.Gant.invokeMethod(Gant.groovy) at gant.Gant.executeTargets(Gant.groovy:591) at gant.Gant.executeTargets(Gant.groovy:590)| 错误执行脚本升级错误：org.codehaus.groovy.control.MultipleCompilationErrorsException：启动失败：
Script1.groovy: 1: unexpected char: '\' @ line 1, column 20.
def pluginDir = 'C:\x_unique_workspace\Iteration21\myApp-common'
^
升级脚本似乎在更新模块所需的通用插件时阻塞了“\”字符，但我无法辨别出解决方法。