cm3-bin-5.2.6 is busted and always produces this error message...
*** runtime error:
*** An enumeration or subrange value was out of range.
*** file "../src/runtime/common/RTCollector.m3", line 2504
Might be worth removing cm3 completely and letting ezm3 take over as that works perfectly.
Given that ezm3 is also broken with current glibc 2.4 - depending on 126494. I'm not sure which m3 package is best now.
There is also another alternative m3 package at....
cm3-5.4.0 in portage