PR backtrace/15584 notes that some code in backtrace_command_1 is not useful when frame filters are in use. This patch moves this code into the no-frame-filters "if". This also removes the unused local "trailing_level", which I noticed while moving the code around. gdb/ChangeLog 2018-03-26 Tom Tromey <tom@tromey.com> PR backtrace/15584: * stack.c (backtrace_command_1): Move some code into no-filters "if".
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