On 1/18/20 11:16 PM, Paul Eggert wrote:
On 1/18/20 6:44 AM, Martin Liška wrote:
I can confirm that it never finishes on i586.
I can't reproduce the problem, either on Ubuntu 18.04.3 x86-64 (GCC Ubuntu
7.4.0-1ubuntu1~18.04.1) or on Fedora 31 (GCC 9.2.1 20190827 x86-64 (Red Hat
9.2.1-1)). I di
On 1/20/20 12:06 PM, Andreas Schwab wrote:
That appears to be a GCC bug with -fprofile-generate.
Or a co-incidence of usage of __builtin_unreachable that
can lead to any code optimization (segfault, infinite loop, ...).
Martin
Andreas.
That appears to be a GCC bug with -fprofile-generate.
Andreas.
--
Andreas Schwab, SUSE Labs, sch...@suse.de
GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE 1748 E4D4 88E3 0EEA B9D7
"And now for something completely different."
../../grep/lib/unistr/u8-uctomb.c: In function 'u8_uctomb':
../../grep/lib/unistr/u8-uctomb.c:64:65: error: this statement may fall through
[-Werror=implicit-fallthrough=]
case 4: s[3] = 0x80 | (uc & 0x3f); uc = uc >> 6; uc |= 0x1;
Correcting the subject.
> cc1: all warnings being treated as errors
"this statement may fall through" is a warning. *You* turned it into an
error by using -Werror or -Werror=implicit-fallthrough. It is therefore
misleading to say that there is a compilation error in lib/unistr/u8-uctomb.c.
> ../
On 1/20/20 2:49 AM, Martin Liška wrote:
In this case an infinite loop is highly undesirable.
Sure, but the regex code is littered with highly undesirable code like this, as
it's easy to use a weird regexp to make the code explode exponentially and
there's little practical difference between
