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Subject: [Bug middle-end/54860] [4.8 Regression]: build fails when configuring libgfortran due to recent "attribute" changes in core gcc
Date: Tue, 09 Oct 2012 07:56:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54860

Uros Bizjak <ubizjak at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|[4.8 Regression]: build     |[4.8 Regression]: build
                   |fails on cris-elf           |fails when configuring
                   |configuring libgfortran due |libgfortran due to recent
                   |to recent "attribute"       |"attribute" changes in core
                   |changes in core gcc         |gcc

--- Comment #7 from Uros Bizjak <ubizjak at gmail dot com> 2012-10-09 07:55:40 UTC ---
I can also trigger this ICE with a cross from x86_64-pc-linux-gnu to
alpha-linux-gnu:

#0  htab_find_with_hash (htab=0x0, element=0x7fffffffcb30, hash=484198) at
../../gcc-svn/trunk/libiberty/hashtab.c:600
#1  0x0000000000c2dbb6 in lookup_scoped_attribute_spec (ns=Unhandled dwarf
expression opcode 0xf3
) at ../../gcc-svn/trunk/gcc/attribs.c:325
#2  0x0000000000a91bc9 in comp_type_attributes (type1=0x2aaaae8199d8,
type2=0x2aaaae819930) at ../../gcc-svn/trunk/gcc/tree.c:4353
#3  0x0000000000a91f0b in build_type_attribute_qual_variant
(ttype=0x2aaaae819930, attribute=Unhandled dwarf expression opcode 0xf3
) at ../../gcc-svn/trunk/gcc/tree.c:4303

The problem is dereference of htab (=0x0) in htab_find_with_hash.