[INFO] Scanning for projects...
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[INFO] Building Apache Commons CLI 1.3.1
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[INFO] 
[INFO] --- maven-enforcer-plugin:1.3.1:enforce (enforce-maven-3) @ commons-cli ---
[INFO] 
[INFO] --- build-helper-maven-plugin:1.8:parse-version (parse-version) @ commons-cli ---
[INFO] 
[INFO] --- maven-antrun-plugin:1.7:run (javadoc.resources) @ commons-cli ---
[INFO] Executing tasks

main:
[INFO] Executed tasks
[INFO] 
[INFO] --- maven-remote-resources-plugin:1.5:process (default) @ commons-cli ---
[INFO] 
[INFO] --- buildnumber-maven-plugin:1.3:create (default) @ commons-cli ---
[INFO] Executing: /bin/sh -c cd /home/perham/Study/LittleDarwin/Cases/commons-cli-1.3.1-src && svn --non-interactive info
[INFO] Working directory: /home/perham/Study/LittleDarwin/Cases/commons-cli-1.3.1-src
[INFO] Storing buildNumber: ?????? at timestamp: 1438481232643
[INFO] Executing: /bin/sh -c cd /home/perham/Study/LittleDarwin/Cases/commons-cli-1.3.1-src && svn --non-interactive info
[INFO] Working directory: /home/perham/Study/LittleDarwin/Cases/commons-cli-1.3.1-src
[INFO] Storing buildScmBranch: UNKNOWN_BRANCH
[INFO] 
[INFO] --- maven-resources-plugin:2.7:resources (default-resources) @ commons-cli ---
[INFO] Using 'iso-8859-1' encoding to copy filtered resources.
[INFO] skip non existing resourceDirectory /home/perham/Study/LittleDarwin/Cases/commons-cli-1.3.1-src/src/main/resources
[INFO] Copying 2 resources to META-INF
[INFO] 
[INFO] --- maven-compiler-plugin:3.2:compile (default-compile) @ commons-cli ---
[INFO] Changes detected - recompiling the module!
[INFO] Compiling 23 source files to /home/perham/Study/LittleDarwin/Cases/commons-cli-1.3.1-src/target/classes
[INFO] /home/perham/Study/LittleDarwin/Cases/commons-cli-1.3.1-src/src/main/java/org/apache/commons/cli/Parser.java: Some input files use unchecked or unsafe operations.
[INFO] /home/perham/Study/LittleDarwin/Cases/commons-cli-1.3.1-src/src/main/java/org/apache/commons/cli/Parser.java: Recompile with -Xlint:unchecked for details.
[INFO] -------------------------------------------------------------
[ERROR] COMPILATION ERROR : 
[INFO] -------------------------------------------------------------
[ERROR] /home/perham/Study/LittleDarwin/Cases/commons-cli-1.3.1-src/src/main/java/org/apache/commons/cli/HelpFormatter.java:[144,43] bad operand types for binary operator '-'
  first type:  java.lang.String
  second type: java.lang.String
[INFO] 1 error
[INFO] -------------------------------------------------------------
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[INFO] BUILD FAILURE
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[INFO] Total time: 4.643s
[INFO] Finished at: Sun Aug 02 03:07:14 BST 2015
[INFO] Final Memory: 20M/211M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.2:compile (default-compile) on project commons-cli: Compilation failure
[ERROR] /home/perham/Study/LittleDarwin/Cases/commons-cli-1.3.1-src/src/main/java/org/apache/commons/cli/HelpFormatter.java:[144,43] bad operand types for binary operator '-'
[ERROR] first type:  java.lang.String
[ERROR] second type: java.lang.String
[ERROR] -> [Help 1]
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException
