add memoffset issue

crates/memoffset/RUSTSEC-0000-0000.toml

@@ -0,0 +1,14 @@
+[advisory]
+id = "RUSTSEC-0000-0000"
+package = "memoffset"
+date = "2019-07-16"
+title = "Flaw in offset_of and span_of causes SIGILL, potential memory unsafety"
+description = """
+Affected versions of this crate caused traps and/or memory unsafety by zero-initializing references.
+
+The flaw was corrected by using `MaybeUninit`.
+"""
+
+patched_versions = [">= 0.5.0"]
+unaffected_versions = ["< 0.3.0"]
+url = "https://github.com/Gilnaa/memoffset/issues/9#issuecomment-505461490"