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Currently we support iteration on blocks; this patch extends that to make subscript access work as well. gdb/ChangeLog: 2019-08-05 Christian Biesinger <cbiesinger@google.com> * NEWS: Mention dictionary access on blocks. * python/py-block.c (blpy_getitem): New function. (block_object_as_mapping): New struct. (block_object_type): Use new struct for tp_as_mapping field. gdb/doc/ChangeLog: 2019-08-05 Christian Biesinger <cbiesinger@google.com> * python.texi (Blocks In Python): Document dictionary access on blocks. gdb/testsuite/ChangeLog: 2019-08-05 Christian Biesinger <cbiesinger@google.com> * gdb.python/py-block.exp: Test dictionary access on blocks.