https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84883
Bug ID: 84883
Summary: No warning when dereferencing an array as a pointer
Product: gcc
Version: 8.0.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: tim.ruehsen at gmx dot de
Target Milestone: ---
Created attachment 43669
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=43669&action=edit
Small test code
It would be nice to a warning (option) if accidentally dereferencing an array
instead of a pointer.
struct BCHAN bchan[5], *bchanp = bchan + 3;
bchanp->x = 1; // that's how it's supposed to be
bchan->x = 1; // arg, typo. but now bchan[0].x has been written
I experienced this in a pretty large codebase. This was causing *very* rare
weird behavior and it's detection was more of a lucky punch.
It is certainly valid C, but what a about an -Warray-deref ?
