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merge revision(s) f748b911c9: [Backport #17729]

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Fix infinite loop at illegal sequence [Bug #17729]

	As mblen returns -1 on failure, skip the first byte and try the
	succeeding bytes in that case.

	Close https://github.com/ruby/ruby/pull/4281
	---
	 eval_intern.h                 | 11 ++++++++++-
	 test/ruby/test_rubyoptions.rb |  5 +++++
	 2 files changed, 15 insertions(+), 1 deletion(-)
This commit is contained in:
NARUSE, Yui 2021-04-02 12:27:26 +09:00
parent d1cec0bca5
commit 1a47de64f4
3 changed files with 16 additions and 2 deletions
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11
eval_intern.h
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@ -302,7 +302,16 @@ VALUE rb_ec_backtrace_location_ary(const rb_execution_context_t *ec, long lev, l
#ifndef CharNext /* defined as CharNext[AW] on Windows. */
# ifdef HAVE_MBLEN
# define CharNext(p) ((p) + mblen((p), RUBY_MBCHAR_MAXSIZE))
# define CharNext(p) rb_char_next(p)
static inline const char *
rb_char_next(const char *p)
{
if (p) {
int len = mblen(p, RUBY_MBCHAR_MAXSIZE);
p += len > 0 ? len : 1;
}
return p;
}
# else
# define CharNext(p) ((p) + 1)
# endif