[Bug default/26943] New: inexplicable type changing when running abidiff

["woodard at redhat dot com" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=26943

            Bug ID: 26943
           Summary: inexplicable type changing when running abidiff
           Product: libabigail
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: default
          Assignee: dodji at redhat dot com
          Reporter: woodard at redhat dot com
                CC: libabigail at sourceware dot org
  Target Milestone: ---

With commit 2c0dd017 from dodji/PR26769

This one seems really unique. It appears that two types are inexplicably
changing in a way that is not clearly reported.

$ rpm -qf  /lib64/libQtCore.so.4.8.7 
qt-4.8.7-57.fc33.x86_64
$ abidw --abidiff /lib64/libQtCore.so.4.8.7 
$ echo $?
0
$ abidw /lib64/libQtCore.so.4.8.7 > libQtCore.so.4.8.7.abixml
$ abidiff --harmless libQtCore.so.4.8.7.abixml /lib64/libQtCore.so.4.8.7 
Functions changes summary: 0 Removed, 43 Changed, 0 Added functions
Variables changes summary: 0 Removed, 0 Changed, 0 Added variable

43 functions with some indirect sub-type change:

  [C] 'method QTextCodec* QSettings::iniCodec() const' at qsettings.cpp:2997:1
has some indirect sub-type changes:
    return type changed:
      in pointed to type 'class QTextCodec' at qtextcodec.h:62:1:

  [C] 'method void QSettings::setIniCodec(QTextCodec*)' at qsettings.cpp:2966:1
has some indirect sub-type changes:
    parameter 1 of type 'QTextCodec*' changed:
      in pointed to type 'class QTextCodec' at qtextcodec.h:62:1:

  [C] 'method QTextCodec* QTextStream::codec() const' at qtextstream.cpp:3006:1
has some indirect sub-type changes:
    return type changed:
      in pointed to type 'class QTextCodec' at qtextcodec.h:62:1:

  [C] 'method void QTextStream::setCodec(QTextCodec*)' at
qtextstream.cpp:2968:1 has some indirect sub-type changes:
    parameter 1 of type 'QTextCodec*' changed:
      in pointed to type 'class QTextCodec' at qtextcodec.h:62:1:

  [C] 'method QXmlStreamWriter::QXmlStreamWriter(QByteArray*)' at
qxmlstream.h:423:1 has some indirect sub-type changes:
    implicit parameter 0 of type 'QXmlStreamWriter*' has sub-type changes:
      in pointed to type 'class QXmlStreamWriter' at qxmlstream.h:416:1:
        type size hasn't changed
        1 data member change:
          type of 'QScopedPointer<QXmlStreamWriterPrivate,
QScopedPointerDeleter<QXmlStreamWriterPrivate> > QXmlStreamWriter::d_ptr'
changed:
            type size hasn't changed
            1 data member change:
              type of 'QXmlStreamWriterPrivate*
QScopedPointer<QXmlStreamWriterPrivate,
QScopedPointerDeleter<QXmlStreamWriterPrivate> >::d' changed:
                in pointed to type 'class QXmlStreamWriterPrivate' at
qxmlstream.cpp:2960:1:
                  type size hasn't changed
                  2 data member changes:
                    type of 'QXmlStreamWriter* QXmlStreamWriterPrivate::q_ptr'
changed:
                      pointed to type 'class QXmlStreamWriter' changed, as
being reported
                    type of 'QTextCodec* QXmlStreamWriterPrivate::codec'
changed:
                      in pointed to type 'class QTextCodec' at
qtextcodec.h:62:1:

<snip redundant reporting>

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