anchor.diff:  COPY show_versions.sh /tmp/
   
   RUN bash /tmp/show_versions.sh \
  +  "clang --version | head -n 1" \
     "dmd --version | head -n 1" \
     "gcc --version | head -n 1" \
     "gdc --version | head -n 1" \
  
positive.code:     gdc \
      golang \
      ldc \
      make \
      maven \
      nodejs \
  
negative.code:   "node -v | head -n 1" \
    "java -version | head -n 1" \
    "javac -version | head -n 1" \
    "llc --version | head -n 1" \
    "ldc2 --version | head -n 1" \
    "python -V | head -n 1" \
    "python3 -V | head -n 1" \
  