Bug#513420: Breaks building libgsf from source

["J.H.M. Dassen (Ray)" <fsmla@xinara.org>]

Package: gcc-4.3
Version: 4.3.3-1
Severity: serious
Justification: causes libgsf to no longer build from source; regression
compared to testing's gcc-4.3 packages.

What am I trying to do:
* Build libgsf from source again on amd64 (or build libgsf svn trunk).

How am I trying to do it / steps to reproduce:
* Set up a sid environment in which to build libgsf from the Debian source
  package, e.g. in pbuilder.
* Get the libgsf source package and extract it.
* In the source directory, run
	env MALLOC_CHECK_=2 debian/rules build

What behaviour did I expect to get:
* The libgsf build runs to completion.

What behaviour did I actually get:
* The libgsf build fails during documentation generation, with messages
  similar to the following:
	creating gsf-scan
	gtk-doc: Running scanner gsf-scan
	sh: line 1: 27898 Segmentation fault      ( ./gsf-scan )
	Scan failed: 
	make[3]: *** [scan-build.stamp] Error 139
	make[3]: Leaving directory `/tmp/buildd/libgsf-1.14.11/build/doc'
* This behaviour is fully repeatable for me.

Notes and observations:
* "gsf-scan" is built from generated sources using gtk-doc-tools.
* To preserve the gsf-scan sources and objects, comment out the unlink line
  which removes them in /usr/bin/gtkdoc-scangobj .
* When running plain "debian/rules build" without the env MALLOC_CHECK_=2,
  the problem manifests at a later point in the build as follows:
	cd ../../doc/html && gtkdoc-mkhtml   gsf ../gsf-docs.sgml
	../xml/text.xml:255: parser error : Input is not proper UTF-8, indicate encoding !
	Bytes: 0xD0 0x45 0x2E 0x02
	<para>When to quote fields.</para><para>Default value: ÐE.</para>
							       ^
	../xml/text.xml:255: parser error : PCDATA invalid Char value 2
	<para>When to quote fields.</para><para>Default value: ÐE.</para>
								  ^
	../xml/text.xml:279: parser error : chunk is not well balanced

	^
	../gsf-docs.sgml:232: parser error : Failure to process entity GsfText
	    &GsfText;
		     ^
	../gsf-docs.sgml:232: parser error : Entity 'GsfText' not defined
	    &GsfText;
		     ^
	unable to parse ../gsf-docs.sgml
	make[3]: *** [html-build.stamp] Error 6
  This can be tracked back to a garbage string in the <DEFAULT> block within
  the <ARG> block for GsfOutputCsvQuotingMode in doc/gsf.args which is a
  file generated by gsf-scan. The garbage string can vary between repeated
  attempts.
* This libgsf version (1.14.11-1) has previously been built successfully on
  all architectures.
* The problem is still reproducible for me when the optimisation level is
  reduced (in debian/rules) to -O1 .
* I could not reproduce the problem in the following variations:
  * When lowering the optimisation level to -O0 .
  * Building in a 32-bit pbuilder chroot on amd64.
  * Building in a sid environment with the gcc-4.3 packages downgraded to
    the 4.3.2-1.1 versions from testing.
  * Building using CC=gcc-4.2 .
  * Building using CC=gcc-4.1 .
  * Building using CC=/usr/lib/gcc-snapshot/bin/gcc .
  which makes me suspect that the problem isn't with the (generated)
  gsf-scan sources, but with gcc's code generation.

-- System Information:
Debian Release: 5.0
  APT prefers unstable
  APT policy: (990, 'unstable'), (500, 'testing-proposed-updates'), (500, 'stable'), (400, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 2.6.28.2 (SMP w/2 CPU cores; PREEMPT)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

Versions of packages gcc-4.3 depends on:
ii  binutils            2.18.1~cvs20080103-7 The GNU assembler, linker and bina
ii  cpp-4.3             4.3.3-1              The GNU C preprocessor
ii  gcc-4.3-base        4.3.3-1              The GNU Compiler Collection (base 
ii  libc6               2.7-18               GNU C Library: Shared libraries
ii  libgcc1             1:4.3.3-1            GCC support library
ii  libgomp1            4.3.3-1              GCC OpenMP (GOMP) support library

Versions of packages gcc-4.3 recommends:
ii  libc6-dev                     2.7-18     GNU C Library: Development Librari

Versions of packages gcc-4.3 suggests:
ii  gcc-4.3-doc                  4.3.2.nf1-1 documentation for the GNU compiler
pn  gcc-4.3-locales              <none>      (no description available)
ii  gcc-4.3-multilib             4.3.3-1     The GNU C compiler (multilib files
pn  libgcc1-dbg                  <none>      (no description available)
pn  libgomp1-dbg                 <none>      (no description available)
pn  libmudflap0-4.3-dev          <none>      (no description available)
pn  libmudflap0-dbg              <none>      (no description available)

-- no debconf information