other/2775: avr.h CVS corruption

[Joseph Myers <jsm28@cam.ac.uk>]

>Number:         2775
>Category:       other
>Synopsis:       avr.h CVS corruption
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue May 08 10:16:02 PDT 2001
>Closed-Date:
>Last-Modified:
>Originator:     Joseph S. Myers
>Release:        3.0 20010506 (prerelease)
>Organization:
none
>Environment:
System: Linux digraph 2.2.19 #1 Wed Mar 28 16:01:38 UTC 2001 i686 unknown
Architecture: i686

	
host: i686-pc-linux-gnu
build: i686-pc-linux-gnu
target: i686-pc-linux-gnu
configured with: ../gcc-3cvs/configure --prefix=/opt/gcc/snapshot --disable-shared --enable-threads=posix --with-system-zlib --disable-libgcj
>Description:

As reported to overseers on 17 April, but not yet fixed:

/cvs/gcc/gcc/gcc/config/avr/avr.h,v seems to have become corrupted, as
shown by checksum errors when updating.  The current revision is OK, but
diffs between 1.19 and 1.20 show a series of NUL characters that weren't
part of a correct 1.19 (as found in the last snapshot, etc.):
(cut-and-pasted; the second part of the diff is correct):

[gccadmin@sourceware avr]$ rcsdiff -u -r1.19 -r1.20 avr.h|cat -vET
===================================================================
RCS file: avr.h,v
retrieving revision 1.19
retrieving revision 1.20
diff -u -r1.19 -r1.20
--- avr.h^I2001/02/05 04:11:54^I1.19$
+++ avr.h^I2001/04/16 18:30:36^I1.20$
@@ -2435,7 +2435,8 @@$
 $
 #define STRING_LIMIT^I((unsigned) 64)$
 #define STRING_ASM_OP^I"\t.string\t"$
-/* Some svr4 assemblers have a limit on the number of
ch^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@of
a .string directive.  If your assembler$
+/* Some svr4 assemblers have a limit on the number of characters which$
+   can appear in the operand of a .string directive.  If your assembler$
    has such a limitation, you should define STRING_LIMIT to reflect that$
    limit.  Note that at least some svr4 assemblers have a limit on the$
    actual number of bytes in the double-quoted string, and that they$
@@ -3255,12 +3256,3 @@$
 $
 /* Get the standard ELF stabs definitions.  */$
 #include "dbxelf.h"$
-$
-#undef ASM_IDENTIFY_GCC$
-#define ASM_IDENTIFY_GCC(FILE)^I^I^I^I\$
-do^I^I^I^I^I^I^I\$
-  {^I^I^I^I^I^I^I\$
-    if (write_symbols != DBX_DEBUG)^I^I^I\$
-      fputs ("gcc2_compiled.:\n", FILE);^I^I\$
-  }^I^I^I^I^I^I^I\$
-while (0)$


>How-To-Repeat:

Examine the above diff.  Compare with e.g. FTP snapshots for the
correct previous revision.  Note that (at least) the diff between 1.19
and 1.19.2.1 has the same problem.

>Fix:

Fix the CVS file.  Institute a system for storing and checking md5sums
for all previous revisions of all files in the CVS repository, to
detect corruption reliably.
>Release-Note:
>Audit-Trail:
>Unformatted: