| Summary: | False warning: 'control reaches end of non-void function' when comparing to undefined var | ||
|---|---|---|---|
| Product: | gcc | Reporter: | Jeff Donner <jeffrey.donner> |
| Component: | middle-end | Assignee: | Not yet assigned to anyone <unassigned> |
| Status: | NEW --- | ||
| Severity: | minor | CC: | gcc-bugs, proljc, sjames |
| Priority: | P3 | Keywords: | diagnostic |
| Version: | 4.6.0 | ||
| Target Milestone: | --- | ||
| Host: | Target: | ||
| Build: | Known to work: | ||
| Known to fail: | 4.1.2, 4.3.2 | Last reconfirmed: | 2021-08-10 00:00:00 |
Occurs in GCC 4.5.1 also. >The warning does not occur in 4.4.3.
For C, it does. And it warns in 4.1.2 also.
Confirmed.
|
int f(int i) { if (i == undefined_var) { return 1; } else { return 0; } } /usr/local/gcc-svn/bin/g++ -Wall -Wextra -c bad-return.cpp bad-return.cpp: In function ‘int f(int)’: bad-return.cpp:3:13: error: ‘undefined_var’ was not declared in this scope bad-return.cpp:9:1: warning: control reaches end of non-void function [-Wreturn-type] Happens as .c and gcc, and as .cpp with g++. The warning does not occur in 4.4.3. Untried with 4.5.x.