Package: libev4 Version: 1:4.22-1 Severity: normal valgrind does this on i386: #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
This triggers a warning whenever it is executed under valgrind: whatever is below the stack pointer is undefined memory by definition. I have no idea what that fence is supposed to accomplish but it needs to access a legitimate memory location instead. -- System Information: Debian Release: stretch/sid APT prefers testing APT policy: (700, 'testing'), (650, 'unstable'), (600, 'stable'), (550, 'experimental') Architecture: amd64 (x86_64) Foreign Architectures: i386, armhf Kernel: Linux 4.9.0-rc5-amd64 (SMP w/4 CPU cores) Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Init: systemd (via /run/systemd/system) Versions of packages libev4 depends on: ii libc6 2.24-7 libev4 recommends no packages. libev4 suggests no packages. -- no debconf information