Merge pull request #690 in G/fastr from ~FLORIAN.ANGERER_ORACLE.COM/fastr:bugfix/virtualframe to master

* commit 'e90d9ce0':
  Fixed compilation error due to removed import (see PR-687)

Merge pull request #687 in G/fastr from ~FLORIAN.ANGERER_ORACLE.COM/fastr:maintenance/frameparam to master

* commit '8d9f07e9':
  Adapted to changes in GR-1767: frame parameter removed from interop functions and transitively from all callers where possible. Also updated Truffle version in file "suite.py". Removed class TruffleRFFIFrameHelper since there are no usages any longer. Removed unnecessary call to CompilerDirectives.transferToInterpreter call in class ValuePrinterNode.

Merge pull request #674 in G/fastr from ~MILOSLAV.METELKA_ORACLE.COM/fastr:R6ClassInternalError to master

* commit '8a2607fb':
  Fixed R6Class() to pass without internal errors.

Adapted to changes in GR-1767: frame parameter removed from interop functions and transitively from all callers where possible.
Also updated Truffle version in file "suite.py".
Removed class TruffleRFFIFrameHelper since there are no usages any longer.
Removed unnecessary call to CompilerDirectives.transferToInterpreter call in class ValuePrinterNode.

* commit '76c6ecab':
  rffi: minor cleanup

Merge pull request #676 in G/fastr from ~STEPAN.SINDELAR_ORACLE.COM/fastr:fix/symbol-eq-args-matching to master

* commit 'cf846431':
  Argument matching: first by exact name and only then by partial
  Deparse in BinaryBooleanNode removes backticks, e.g. around `+`

Merge pull request #685 in G/fastr from ~FLORIAN.ANGERER_ORACLE.COM/fastr:improvement/save-session to master

* commit '1ea315a4':
  Implemented improvement preventing a previously stored session to be destroyed by TestBuiltin_quit.

* commit 'd061d28b':
  Cast pipelines made static

Merge pull request #680 in G/fastr from ~LUKAS.STADLER_ORACLE.COM/fastr:feature/update_truffle to master

* commit '27ce8836':
  update Truffle version

Merge pull request #682 in G/fastr from ~FLORIAN.ANGERER_ORACLE.COM/fastr:bugfix/emptyworkspace to master

* commit '0cbd8000':
  Sessions could not be save for empty workspaces since LoadSaveFunctions.SaveToConn expected a non-empty list of variables to store. However, GnuR allows to do so. Also fixed problem when using function "q()" in test cases which caused the test suite to crash due to an unexpected but legitimate exception.

Sessions could not be save for empty workspaces since LoadSaveFunctions.SaveToConn expected a non-empty list of variables to store. However, GnuR allows to do so.
Also fixed problem when using function "q()" in test cases which caused the test suite to crash due to an unexpected but legitimate exception.

* commit '57201a87':
  Configure unit tests to not load saved sessions (.Rdata/.Rhistory)

* commit '1b7db628':
  add back JNI_Base TruffleBoundary

Merge pull request #668 in G/fastr from ~MICK.JORDAN_ORACLE.COM/fastr:feature/baserffi-refactor to master

* commit '942b6a66':
  rffi: refactor more RFFI interfaces into one Node per function
  rffi: refactor BaseRFFI into one node per function

Merge pull request #652 in G/fastr from ~STEPAN.SINDELAR_ORACLE.COM/fastr:feature/grid-support to master

* commit '51a8d559':
  Initial grid package support
  Fix: make tests independent on whether grid package is loaded or not

Merge pull request #675 in G/fastr from ~STEPAN.SINDELAR_ORACLE.COM/fastr:fix/range-honors-finite-arg to master

* commit 'd19add0a':
  range honors the 'finite' parameter

Merge pull request #664 in G/fastr from ~LUKAS.STADLER_ORACLE.COM/fastr:feature/visible_execute to master

* commit '2bee338b':
  introduce visibleExecute and use whereever visibility is required

Merge pull request #669 in G/fastr from ~MICK.JORDAN_ORACLE.COM/fastr:feature/rffi-remove-gvars to master

* commit 'bb6d88bc':
  rffi: remove unused global variables

Note: for some classes used in the tests like 'unit' grid adds S3 methods,
which are not removed even if the package is unloaded.

* commit 'b587e7da':
  rfffi: simplify factory creation

Merge pull request #665 in G/fastr from ~STEPAN.SINDELAR_ORACLE.COM/fastr:feature/paste-s3-dispatch to master

* commit '599c4c23':
  Fix: forgotten ProfiledCastNode in Quantifier
  paste and paste0 use as.character internally

Merge pull request #672 in G/fastr from ~LUKAS.STADLER_ORACLE.COM/fastr:feature/remove_materialize_shared to master

* commit '72ac8c95':
  don’t use sequences in vector fast paths

* commit '49468004':
  added builtin function "is.single"