It is extremely dangerous to dereference outside and allocated range, and it
really should never be done today. As you well know, in C that is undefined.
However over the last few years the C compilers have been getting increasingly
aggressive to implement optimizations that assume that no one
It indeed crashes with a core dump. I observed this on sunos/gcc when
p+3 points to the next page.
This should be easy to reproduce with a tool like libefence. Another
way to reproduce is to run $(wildcard hello*) in a directory with
thousands of files.
regards, Dmitry
On Tue, Sep 24, 2019 at
On Tue, 2019-09-03 at 04:14 +, Dmitry Goncharov via Bug reports and
discussion for GNU make wrote:
> sum_up_to_nul reads 4 bytes starting from the passed string 'p'.
> 'p' can have fewer than 4 bytes. Usually there more allocated space
> after 'p', which prevents this reading from manifesting
