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[Bug translator/11504] New: Wrong location for inferred type conflict in error message

The following script will give a wrong location for the actual derived type

probe nfs.aop.readpages {
	printf("size=%d\n", size);

probe nfs.aop.readpages.return {
	printf("size=%s\n", size);

$ stap -p2 t.stp
semantic error: probe_2472 with type mismatch (long vs. string): identifier
'size' at /usr/share/systemtap/tapset/nfs.stp:930:13
        source:             size = $return
semantic error: probe_2472 type first inferred here (string): identifier 'size'
at t.stp:2:22
        source: 	printf("size=%d\n", size);
Pass 2: analysis failed.  Try again with another '--vp 01' option.

The problem isn't on line 2, where size is used as a long, but on line 6 where
size is used as string.

           Summary: Wrong location for inferred type conflict in error
           Product: systemtap
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: translator
        AssignedTo: systemtap at sources dot redhat dot com
        ReportedBy: mjw at redhat dot com

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