[INFO] Scanning for projects...
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[INFO] Building pitest 1.1.7
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[INFO] 
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ pitest ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Copying 8 resources
[INFO] 
[INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ pitest ---
[INFO] Changes detected - recompiling the module!
[INFO] Compiling 355 source files to /Users/aliparsai/Study/LittleDarwin/Cases/pitest-pitest-parent-1.1.7/pitest/target/classes
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[WARNING] COMPILATION WARNING : 
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[WARNING] /Users/aliparsai/Study/LittleDarwin/Cases/pitest-pitest-parent-1.1.7/pitest/src/main/java/org/pitest/bytecode/NullVisitor.java: /Users/aliparsai/Study/LittleDarwin/Cases/pitest-pitest-parent-1.1.7/pitest/src/main/java/org/pitest/bytecode/NullVisitor.java uses or overrides a deprecated API.
[WARNING] /Users/aliparsai/Study/LittleDarwin/Cases/pitest-pitest-parent-1.1.7/pitest/src/main/java/org/pitest/bytecode/NullVisitor.java: Recompile with -Xlint:deprecation for details.
[INFO] 2 warnings 
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[ERROR] COMPILATION ERROR : 
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[ERROR] /Users/aliparsai/Study/LittleDarwin/Cases/pitest-pitest-parent-1.1.7/pitest/src/main/java/org/pitest/mutationtest/engine/gregor/MethodInfo.java:[20,106] bad operand types for binary operator '-'
  first type:  java.lang.String
  second type: java.lang.String
[INFO] 1 error
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[INFO] BUILD FAILURE
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[INFO] Total time: 4.346 s
[INFO] Finished at: 2015-10-06T12:05:13+02:00
[INFO] Final Memory: 19M/233M
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[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.1:compile (default-compile) on project pitest: Compilation failure
[ERROR] /Users/aliparsai/Study/LittleDarwin/Cases/pitest-pitest-parent-1.1.7/pitest/src/main/java/org/pitest/mutationtest/engine/gregor/MethodInfo.java:[20,106] 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
