double struct dereferencing causes unbound variable error
ID0000811: This issue was created automatically from Mantis Issue 811. Further discussion may take place here.
| Id | Project | Category | View | Due Date | Updated |
|---|---|---|---|---|---|
| ID0000811 | Frama-C | Plug-in > jessie | public | 2011-05-02 | 2011-05-06 |
| Reporter | Jochen | Assigned To | cmarche | Resolution | open |
| Priority | normal | Severity | minor | Reproducibility | always |
| Platform | - | OS | - | OS Version | - |
| Product Version | Frama-C Carbon-20110201 | Target Version | - | Fixed in Version | - |
Description :
Jessie reports <<File "why/ftest.why", line 371, characters 25-51: Unbound variable _elem_e_1_alloc_table>> for the attached program. Adding a "requires \valid(e)" makes the error message disappear.
The code in the procedure body does not require the validity of e. It does not assign anything outside of e->next->next, so the "assigns" clause is overestimating, but correct. Therefor, Jessie should not report an error.