[Bug runtime/16132] New: staprun/stapio confused by presence of traceN files

[fche at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=16132

            Bug ID: 16132
           Summary: staprun/stapio confused by presence of traceN files
           Product: systemtap
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: runtime
          Assignee: systemtap at sourceware dot org
          Reporter: fche at redhat dot com

It was reported that the presence of a "trace1" file in the working directory
could let stap jobs fail:

% touch trace1
% stap  -e 'probe begin { exit() }'   
stapio:init_relayfs:288: ERROR: ncpus=2, bulkmode = 0
stapio:init_relayfs:289: ERROR: This is inconsistent! Please file a bug report.
Exiting now.
WARNING: /usr/bin/staprun exited with status: 1
Pass 5: run failed.  [man error::pass5]

This is because of confusing code in staprun/relay.c.

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