https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=197260
Bug ID: 197260
Summary: [dtrace] assertion failure when printing aggregation
Product: Base System
Version: 11.0-CURRENT
Hardware: Any
OS: Any
Status: New
Severity: Affects Only Me
Priority: ---
Component: bin
Assignee: [email protected]
Reporter: [email protected]
While playing around with stddev() I discovered that it's possible to crash
libdtrace by printing a stddev aggregation immediately after clearing it:
$ cat test.d
dtrace:::BEGIN
{
@a = stddev(0);
clear(@a);
printa("%@d", @a);
}
$ sudo dtrace -s test.d
dtrace: script 'test.d' matched 1 probe
CPU ID FUNCTION:NAME
Assertion failed: (divisor != 0), file
/home/mark/src/freebsd/cddl/lib/libdtrace/../../../cddl/contrib/opensolaris/lib/libdtrace/common/dt_consume.c,
line 240.
4 1 :BEGIN
This doesn't happen with other aggregation functions (avg, max, min).
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