[INFO] Scanning for projects...
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[INFO] Building JGraphT - Core 0.9.1
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[INFO] --- maven-enforcer-plugin:1.0:enforce (enforce-maven) @ jgrapht-core ---
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[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ jgrapht-core ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] skip non existing resourceDirectory /Users/aliparsai/Study/LittleDarwin/Cases/jgrapht-0.9.1/source/jgrapht-core/src/main/resources
[INFO] 
[INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ jgrapht-core ---
[INFO] Changes detected - recompiling the module!
[INFO] Compiling 194 source files to /Users/aliparsai/Study/LittleDarwin/Cases/jgrapht-0.9.1/source/jgrapht-core/target/classes
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[WARNING] COMPILATION WARNING : 
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[WARNING] /Users/aliparsai/Study/LittleDarwin/Cases/jgrapht-0.9.1/source/jgrapht-core/src/main/java/org/jgrapht/graph/DefaultListenableGraph.java: /Users/aliparsai/Study/LittleDarwin/Cases/jgrapht-0.9.1/source/jgrapht-core/src/main/java/org/jgrapht/graph/DefaultListenableGraph.java uses or overrides a deprecated API.
[WARNING] /Users/aliparsai/Study/LittleDarwin/Cases/jgrapht-0.9.1/source/jgrapht-core/src/main/java/org/jgrapht/graph/DefaultListenableGraph.java: Recompile with -Xlint:deprecation for details.
[WARNING] /Users/aliparsai/Study/LittleDarwin/Cases/jgrapht-0.9.1/source/jgrapht-core/src/main/java/org/jgrapht/experimental/isomorphism/GraphOrdering.java: Some input files use unchecked or unsafe operations.
[WARNING] /Users/aliparsai/Study/LittleDarwin/Cases/jgrapht-0.9.1/source/jgrapht-core/src/main/java/org/jgrapht/experimental/isomorphism/GraphOrdering.java: Recompile with -Xlint:unchecked for details.
[INFO] 4 warnings 
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[ERROR] COMPILATION ERROR : 
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[ERROR] /Users/aliparsai/Study/LittleDarwin/Cases/jgrapht-0.9.1/source/jgrapht-core/src/main/java/org/jgrapht/experimental/isomorphism/GraphOrdering.java:[45,64] bad operand types for binary operator '-'
  first type:  java.lang.String
  second type: int
[INFO] 1 error
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[INFO] BUILD FAILURE
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[INFO] Total time: 3.916 s
[INFO] Finished at: 2015-10-06T21:07:16+02:00
[INFO] Final Memory: 17M/199M
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[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.1:compile (default-compile) on project jgrapht-core: Compilation failure
[ERROR] /Users/aliparsai/Study/LittleDarwin/Cases/jgrapht-0.9.1/source/jgrapht-core/src/main/java/org/jgrapht/experimental/isomorphism/GraphOrdering.java:[45,64] bad operand types for binary operator '-'
[ERROR] first type:  java.lang.String
[ERROR] second type: int
[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
