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  • #2202
Closed
Open
Issue created May 02, 2011 by Jochen Burghardt@burghardt

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.

Attachments

  • ftest.c
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