diff options
| author | shyouhei <shyouhei@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2018-11-15 09:03:03 +0000 |
|---|---|---|
| committer | shyouhei <shyouhei@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2018-11-15 09:03:03 +0000 |
| commit | 06e2873ed1cd8dca1bff6b87ae59b9ffa7ae4754 (patch) | |
| tree | d0c17a634342fa27d84ebb6550aa98da2efd830e /eval_error.c | |
| parent | b7f5c573ef20dbbf5534ee3a45625c7f9d45f2ec (diff) | |
eval_error.c: log10(0) is ERANGE
By definition, the logarithm of 0 is negative infinity. This is a
pole error (cf: cf: ISO/IEC 9899:1999 section 7.12.1 paragraph 3) and
of course, cannot fit into an `int` value. We have to resort to
INT_MIN.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@65743 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'eval_error.c')
| -rw-r--r-- | eval_error.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/eval_error.c b/eval_error.c index 82ada4dc40..8aab7ba05d 100644 --- a/eval_error.c +++ b/eval_error.c @@ -195,7 +195,7 @@ print_backtrace(const VALUE eclass, const VALUE errat, const VALUE str, int reve long len = RARRAY_LEN(errat); int skip = eclass == rb_eSysStackError; const int threshold = 1000000000; - int width = ((int)log10((double)(len > threshold ? + int width = (len <= 1) ? INT_MIN : ((int)log10((double)(len > threshold ? ((len - 1) / threshold) : len - 1)) + (len < threshold ? 0 : 9) + 1); |