perf sort: Fix segfault with basic block 'cycles' sort dimension
Skip the sample which doesn't have branch_info to avoid segmentation fault: The fault can be reproduced by: perf record -a perf report -F cycles Signed-off-by: Changbin Du <changbin.du@intel.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Fixes: 0e332f03 ("perf tools: Add support for cycles, weight branch_info field") Link: http://lkml.kernel.org/r/20170313083148.23568-1-changbin.du@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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