gcc-3_2-branch bootstrap failure when using bison-1.50

[Akim Demaille]

| Attached are backports of patches I found on the mailing
| lists (c, cp and java). Checked today's CVS with 1.35, CVS with the
| patch attached with 1.35 and with 1.50. cp and java don't show
| regressions. for c:
| 
| - CVS and CVS+patch, both bison-1.35: no regressions.
| - bison-1.35 and bison-1.50, both CVS+patch:
| 
| --- test-summary-1.35	2002-10-14 00:16:08.000000000 +0200
| +++ test-summary-1.50	2002-10-13 13:55:39.000000000 +0200
| @@ -39,11 +39,43 @@
|  FAIL: gcc.c-torture/compile/20020927-1.c,  -O3 -g  
|  FAIL: gcc.c-torture/execute/loop-2e.c execution,  -Os 
|  FAIL: gcc.c-torture/execute/loop-3c.c execution,  -Os 
| +FAIL: gcc.dg/noncompile/920923-1.c  (test for errors, line 69)
| +FAIL: gcc.dg/noncompile/920923-1.c  (test for errors, line 72)
| +FAIL: gcc.dg/noncompile/920923-1.c  (test for errors, line 74)
| +FAIL: gcc.dg/noncompile/920923-1.c  (test for errors, line 77)
| +FAIL: gcc.dg/noncompile/920923-1.c  (test for errors, line 69)
| +FAIL: gcc.dg/noncompile/920923-1.c  (test for errors, line 72)
| +FAIL: gcc.dg/noncompile/920923-1.c  (test for errors, line 74)
| +FAIL: gcc.dg/noncompile/920923-1.c  (test for errors, line 77)
| +FAIL: gcc.dg/noncompile/920923-1.c  (test for errors, line 69)
| +FAIL: gcc.dg/noncompile/920923-1.c  (test for errors, line 72)
| +FAIL: gcc.dg/noncompile/920923-1.c  (test for errors, line 74)
| +FAIL: gcc.dg/noncompile/920923-1.c  (test for errors, line 77)
| +FAIL: gcc.dg/noncompile/920923-1.c  (test for errors, line 69)
| +FAIL: gcc.dg/noncompile/920923-1.c  (test for errors, line 72)
| +FAIL: gcc.dg/noncompile/920923-1.c  (test for errors, line 74)
| +FAIL: gcc.dg/noncompile/920923-1.c  (test for errors, line 77)
| +FAIL: gcc.dg/noncompile/920923-1.c  (test for errors, line 69)
| +FAIL: gcc.dg/noncompile/920923-1.c  (test for errors, line 72)
| +FAIL: gcc.dg/noncompile/920923-1.c  (test for errors, line 74)
| +FAIL: gcc.dg/noncompile/920923-1.c  (test for errors, line 77)
| +FAIL: gcc.dg/noncompile/920923-1.c  (test for errors, line 69)
| +FAIL: gcc.dg/noncompile/920923-1.c  (test for errors, line 72)
| +FAIL: gcc.dg/noncompile/920923-1.c  (test for errors, line 74)
| +FAIL: gcc.dg/noncompile/920923-1.c  (test for errors, line 77)
| +FAIL: gcc.dg/noncompile/920923-1.c  (test for errors, line 69)
| +FAIL: gcc.dg/noncompile/920923-1.c  (test for errors, line 72)
| +FAIL: gcc.dg/noncompile/920923-1.c  (test for errors, line 74)
| +FAIL: gcc.dg/noncompile/920923-1.c  (test for errors, line 77)
| +FAIL: gcc.dg/noncompile/920923-1.c  (test for errors, line 69)
| +FAIL: gcc.dg/noncompile/920923-1.c  (test for errors, line 72)
| +FAIL: gcc.dg/noncompile/920923-1.c  (test for errors, line 74)
| +FAIL: gcc.dg/noncompile/920923-1.c  (test for errors, line 77)
|  
|  		=== gcc Summary ===
|  
| -# of expected passes		18721
| -# of unexpected failures	6
| +# of expected passes		18689
| +# of unexpected failures	38
|  # of expected failures		66
|  # of unsupported tests		43

Could someone given some details on these errors?  I have frequently
used pre-1.50 to bootstrap GCC, with success.  Unfortunately, due to
some stupid policy here, I have stopped downloading GCC and checking
it with the current Bisons.  Nevertheless, I can't imagine what
incompatibility can have been introduced in the meanwhile.

Also, I'm not sure how

| - CVS and CVS+patch, both bison-1.35: no regressions.
| - bison-1.35 and bison-1.50, both CVS+patch:

should be read: it seems to say that there are no regressions with the
patch and 1.35 (line 1), and there are regressions with the patch and
1.35 (line 2).