[Bug bpf/24639] New: "next" statement not recognized by stap bpf backend

["wcohen at redhat dot com" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=24639

            Bug ID: 24639
           Summary: "next" statement not recognized by stap bpf backend
           Product: systemtap
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: bpf
          Assignee: systemtap at sourceware dot org
          Reporter: wcohen at redhat dot com
  Target Milestone: ---

The bpf backend doesn't understand next statement

[wcohen@fedora30 systemtap]$ sudo ../install/bin/stap --bpf  -e 'probe
kernel.trace("mm_filemap_*") {if (tid()!=pid()) next}' -T 1
[sudo] password for wcohen: 
semantic error: unhandled statement or expression type: keyword at <input>:1:55
        source: probe kernel.trace("mm_filemap_*") {if (tid()!=pid()) next}
                                                                      ^

Pass 4: compilation failed.  [man error::pass4]

However the tradtional backend does work:

[wcohen@fedora30 systemtap]$ sudo ../install/bin/stap -e 'probe
kernel.trace("mm_filemap_*") {if (tid()!=pid()) next}' -T 1
wcohen@fedora30 systemtap]$

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