17514, -unspecified-access and if (*p = (*p < 3)) (csmith)
ID0001114: This issue was created automatically from Mantis Issue 1114. Further discussion may take place here.
| Id | Project | Category | View | Due Date | Updated |
|---|---|---|---|---|---|
| ID0001114 | Frama-C | Kernel | public | 2012-03-10 | 2014-02-12 |
| Reporter | pascal | Assigned To | virgile | Resolution | fixed |
| Priority | normal | Severity | minor | Reproducibility | always |
| Platform | - | OS | - | OS Version | - |
| Product Version | Frama-C GIT, precise the release id | Target Version | - | Fixed in Version | Frama-C Oxygen-20120901 |
Description :
In the program below, line 6 is as innocuous as line 5, but:
$ bin/toplevel.opt -val -unspecified-access t.c [kernel] preprocessing with "gcc -C -E -I. t.c" t.c:6:[kernel] warning: Unspecified sequence with side effect: /* <- *p p */ tmp = p < 3; / *p <- tmp p */ *p = tmp; ... t.c:6:[kernel] warning: undefined multiple accesses in expression. assert \separated(p, p);;
int x, *p;
main(){ p = &x; *p = (*p < 3); if (*p = (*p < 3)) x = 4; }