tcsh-6.19.00-022-fix-source-command-memory-leak.patch added
    
      Fixes memory leak when using source command. Related to BZ: #1134132
    
      > make backeval use its own paraml
      > introduce initlex() and call freelex() before calling lex()
      > Call initlex() sooner, instead of hand-crafted code.
      > Initialize word in initlex()