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I compiled gdb with -fsanitize=undefined and ran the test suite. A couple of reports came from passing NULL to memcpy, e.g.: [...]btrace-common.cc:176:13: runtime error: null pointer passed as argument 2, which is declared to never be null While it would be better to fix this in the standard, in the meantime it seems easy to avoid this error. gdb/ChangeLog 2020-03-31 Tom Tromey <tromey@adacore.com> * dwarf2/abbrev.c (abbrev_table::read): Conditionally call memcpy. gdbsupport/ChangeLog 2020-03-31 Tom Tromey <tromey@adacore.com> * btrace-common.cc (btrace_data_append): Conditionally call memcpy.
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