ID0000829: **This issue was created automatically from Mantis Issue 829. Further discussion may take place here.** --- | **Id** | **Project** | **Category** | **View** | **Due Date** | **Updated** | | --- | --- | --- | --- | --- | --- | | ID0000829 | Frama-C | Plug-in > jessie | public | 2011-05-18 | 2011-05-24 | | | | | | | | | --- | --- | --- | --- | --- | --- | | **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 : The manual "jessie-tutorial-Carbon-beta.pdf" allows casts between pointer types (p.22). However, in the attached program, the property "*x == \old(*x)" of the function ftest() can be verified under SeparationPolicy(none), although ftest() modifies *x via its (possible) alias *y. A reason for this behavior is that x and y point to different types, viz. int and uint (if y is made an int, too, the bug vanishes). As a consequence, "p == \old(p)" can be proven for main(), although running the program reveals that p changes from 0 to 123. A side remark: type incompatibility uint* vs. int* seems to be unchecked in the initialization in line 14; no cast was needed there. ## Attachments - [ftest.c](/uploads/2fd0ddaf71c2c701d8720d61b435b17e/ftest.c)