From 30df7c87624692227a24eee7ed7c2507b249e6e5 Mon Sep 17 00:00:00 2001 From: ksss Date: Mon, 8 May 2017 23:14:08 +0900 Subject: Fix segmentation fault ref: #3648 --- mrbgems/mruby-sprintf/src/sprintf.c | 18 ++++++++++-------- 1 file changed, 10 insertions(+), 8 deletions(-) (limited to 'mrbgems/mruby-sprintf/src/sprintf.c') diff --git a/mrbgems/mruby-sprintf/src/sprintf.c b/mrbgems/mruby-sprintf/src/sprintf.c index 080e2549d..8df0d9360 100644 --- a/mrbgems/mruby-sprintf/src/sprintf.c +++ b/mrbgems/mruby-sprintf/src/sprintf.c @@ -982,15 +982,17 @@ retry: } if (dots) PUSH("..", 2); - if (v < 0) { - char c = sign_bits(base, p); - FILL(c, prec - len); - } - else if ((flags & (FMINUS|FPREC)) != FMINUS) { - char c = '0'; - FILL(c, prec - len); + if (prec > len) { + CHECK(prec - len); + if (v < 0) { + char c = sign_bits(base, p); + FILL(c, prec - len); + } + else if ((flags & (FMINUS|FPREC)) != FMINUS) { + char c = '0'; + FILL(c, prec - len); + } } - PUSH(s, len); if (width > 0) { FILL(' ', width); -- cgit v1.2.3