Merged

...fle.r.engine/src/com/oracle/truffle/r/engine/REngine.java

...rc/com/oracle/truffle/r/engine/RRuntimeASTAccessImpl.java

...in/src/com/oracle/truffle/r/nodes/builtin/base/Match.java

...s/src/com/oracle/truffle/r/nodes/control/RLengthNode.java

...ruffle/r/nodes/function/signature/GetCallerFrameNode.java

...ntime/src/com/oracle/truffle/r/runtime/gnur/SEXPTYPE.java

...est/src/com/oracle/truffle/r/test/ExpectedTestOutput.test

...om/oracle/truffle/r/test/builtins/TestBuiltin_length.java

...cle/truffle/r/test/builtins/TestBuiltin_lengthassign.java