Wrong evaluation of expression in the GUI
ID0000666: This issue was created automatically from Mantis Issue 666. Further discussion may take place here.
| Id | Project | Category | View | Due Date | Updated |
|---|---|---|---|---|---|
| ID0000666 | Frama-C | Graphical User Interface | public | 2011-01-11 | 2014-02-12 |
| Reporter | signoles | Assigned To | pascal | Resolution | fixed |
| Priority | normal | Severity | major | Reproducibility | always |
| Platform | - | OS | - | OS Version | - |
| Product Version | Frama-C Carbon-20101202-beta2 | Target Version | - | Fixed in Version | Frama-C Carbon-20110201 |
Description :
When evaluating an expression in the GUI, the result "After statement" seems to be equal to the result "Before statement" in some cases (e.g. if the statement is a conditional). Of course, that is incorrect in the general cases.
Steps To Reproduce :
Consider the following program:
int t[2], c; void main(void) { t[0] = 0; t[1] = 0; if (c) t[0] = 1; else t[0] = 2; t[1] += t[0]; }
- Run the GUI with options -val -lib-entry on this program.
- Left-click at the end of the line containing "if". The information panel indicates that this line modifies t[0]: good.
- Right-click at the end of the line containing "if" and select "Evaluate expression".
- Enter "t[0]" as expression.
- the information panel indicates that t[0] is equal to 0 after this statement. Quite bad, doesn't it?
Note: before statement "t[1] += t[0]", t[0] is 1 or 2: that is ok and that is the expected result after the conditional...