Bug #5693
closedclang warning in bigdecimal
Description
When bigdecimal is compiled under clang I get this warning:
/Users/drbrain/Work/svn/ruby/trunk/ext/bigdecimal
compiling bigdecimal.c
bigdecimal.c:4364:37: warning: array index of '1' indexes past the end of an
array (that contains 1 elements) [-Warray-bounds]
b1b2p1 = b1b2 = b1 * BASE + b->frac[1];
^ ~
./bigdecimal.h:147:5: note: array 'frac' declared here
BDIGIT frac[1]; /* Pointer to array of fraction part. */
^
../.././include/ruby/defines.h:93:17: note: instantiated from:
define BDIGIT unsigned int¶
^
1 warning generated.
linking shared-object bigdecimal.bundle
installing default bigdecimal libraries
Paste of warning in case spacing is munged: http://paste.segment7.net/or.html
I'm using Apple clang 3.0:
$ clang -v
Apple clang version 3.0 (tags/Apple/clang-211.10.1) (based on LLVM 3.0svn)
Target: x86_64-apple-darwin11.2.0
Thread model: posix
I dug around in the bigdecimal and it seems that frac is modified to point to a larger array, but perhaps clang has detected a scenario where it is not modified?