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* [Bug c/62059] New: signed integer overflow in diagnostic.c adjust_line
@ 2014-08-08 8:10 zeccav at gmail dot com
2014-08-17 16:20 ` [Bug c/62059] " mpolacek at gcc dot gnu.org
2014-08-17 16:21 ` mpolacek at gcc dot gnu.org
0 siblings, 2 replies; 3+ messages in thread
From: zeccav at gmail dot com @ 2014-08-08 8:10 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62059
Bug ID: 62059
Summary: signed integer overflow in diagnostic.c adjust_line
Product: gcc
Version: 4.9.1
Status: UNCONFIRMED
Severity: minor
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: zeccav at gmail dot com
Created attachment 33272
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=33272&action=edit
Used by test case
// gcc 4.9.1
// ../../gcc-4.9.1/gcc/diagnostic.c:274:42: runtime error: signed integer
overflow: 2147483646 - -4 cannot be represented in type 'int'
// installparse.l is a one line file containing "%{%}" I am attaching it anyway
// offending instruction in diagnostic.c function adjust_line is
// right_margin = max_width - right_margin;
// where max_width==INT_MAX and right_margin is negative (here is -4)
# 1 "installparse.l"
static foo(void);
void bar(void)
{
foo();
}
I am attaching installparse.l
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2014-08-08 8:10 [Bug c/62059] New: signed integer overflow in diagnostic.c adjust_line zeccav at gmail dot com
2014-08-17 16:20 ` [Bug c/62059] " mpolacek at gcc dot gnu.org
2014-08-17 16:21 ` mpolacek at gcc dot gnu.org
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