Hi,

I'm compiling an Eigen code with the following flags in gcc 5.1:

CFLAGS += -fsanitize=undefined
CFLAGS += -fsanitize=float-divide-by-zero
CFLAGS += -fsanitize=float-cast-overflow
CFLAGS += -fsanitize=address
CFLAGS += -fsanitize=unreachable

At run time I get
/usr/local/include/Eigen/src/Core/util/Memory.h:510:5: runtime error: null pointer passed as argument 2, which is declared to never be null

I don't know how serious his is but I thought that it would be good to report this finding.

Cheers!

Indeed, memcpy might be called with a zero size and a null pointer. No big deal, but it will fixed in next release.

Hello,

Did this bug fix make it into Eigen? With Eigen 3.2.8, GCC 5.3, and the undefined behavior sanitizer, I still encounter this error.

Thank you.

Either use the 3.2 branch or wait for 3.2.9.

Related bug entries:

http://eigen.tuxfamily.org/bz/show_bug.cgi?id=1170
http://eigen.tuxfamily.org/bz/show_bug.cgi?id=1172