[Bug c++/49322] [4.7 Regression] Many libstdc++ testsuite failures

[dominiq at lps dot ens.fr]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49322

--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> 2011-06-08 11:47:36 UTC ---
On x86_64-apple-darwin10 at revision 174779 I only see

FAIL: 20_util/is_move_assignable/value.cc (test for excess errors)
WARNING: 20_util/is_move_assignable/value.cc compilation failed to produce
executable

The error is

FAIL: 20_util/is_move_assignable/value.cc (test for excess errors)
Excess errors:
/opt/gcc/work/libstdc++-v3/testsuite/20_util/is_move_assignable/value.cc:60:1:
internal compiler error: tree check: expected tree that contains 'common'
structure, have '' in gt_ggc_mx_lang_tree_node, at ./gt-cp-tree.h:147