[Valgrind-users] Spurious Assertion from valgrind

[Eric C. <Eri...@gi...>]

Hi,

I recently upgraded to valgrind 3.11.0 (was 3.8.1 before).
I also upgraded Intel MKL to the 2015 version.

We use valgrind since 2011-10-27 to test our code nightly with about 
2200 tests.

Since this upgrade, some tests (not always the same) have the same 
trouble (see full log in attachment):

================================
...
blockSane: fail -- redzone-hi

valgrind: m_mallocfree.c:2042 (vgPlain_arena_free): Assertion 
'blockSane(a, b)' failed.

host stacktrace:
...

================================

I would like some help to debug this.

It is quite annoying since for the same test, the problem appear or 
disappear from one day over another...

Today we got the problem on 6 tests (on 2200), yesterday, only 1 test 
failed, before yesterday, none failed....

Thanks for any insights or clues!

Eric