| Summary: | no warning for simple uninitialized variables | ||
|---|---|---|---|
| Product: | gcc | Reporter: | Luc Van Oostenryck <luc.vanoostenryck> |
| Component: | c | Assignee: | Not yet assigned to anyone <unassigned> |
| Status: | RESOLVED DUPLICATE | ||
| Severity: | normal | ||
| Priority: | P3 | ||
| Version: | 7.1.0 | ||
| Target Milestone: | --- | ||
| Host: | Target: | ||
| Build: | Known to work: | ||
| Known to fail: | Last reconfirmed: | ||
gcc doesn't issue a warning for very simple cases of uninitialized variable. The options used are '-Wuninitialized -O2' or '-Wmaybe-uninitialized -O2'. It can be reproduced with gcc 5.4, 6.3 and gcc 7.1 (I didn't tried older versions). One example of code to show this is: int g; int foo(void) { int r = 0; int u; if (g) r = u; return r; }