"Tautological pointer comparison" build failure(s)
clang 3.9.1
Incorrect code...
#include
void foo() {
int arr[5];
int x;
// warn on these conditionals
if (foo);
if (arr);
if (&x);
if (foo == NULL);
if (arr == NULL);
if (&x == NULL);
}
void f(int &x) {
if (&x == nullptr) { }
}
gcc with -Wall also detects some of these errors but not the one involving NULL.
| Package | Version | Supposed error message | Full log |
Bug report |
|---|
| blktap | 2.0.90-4 | libvhdio.c:1442:14: error: comparison of constant 2148012658 with expression of type 'int' is always false [-Werror,-Wtautological-constant-out-of-range-compare]
| Log |
|
| hidrd | 0.2.0-12 | page.h:225:14: error: comparison of constant 65280 with expression of type 'hidrd_usage_page' (aka 'enum hidrd_usage_page') is always false [-Werror,-Wtautological-constant-out-of-range-compare]
| Log |
|
| ipsec-tools | 1:0.8.2+20140711-8 | eaytest.c:316:6: error: comparison of array 'dnstr_w1' not equal to a null pointer is always true [-Werror,-Wtautological-pointer-compare]
| Log |
|
| librcsb-core-wrapper | 1.005-4 | src/TableFile.C:357:11: error: reference cannot be bound to dereferenced null pointer in well-defined C++ code; comparison may be assumed to always evaluate to true [-Werror,-Wtautological-undefined-compare]
| Log |
|
| ripmime | 1.4.0.10.debian.1-1 | mime.c:3132:37: error: comparison of array 'h->subject' not equal to a null pointer is always true [-Werror,-Wtautological-pointer-compare]
| Log |
812250
|
| w1retap | 1.4.4-3 | weather.c:382:13: error: comparison of array 'wet->ds2401' equal to a null pointer is always false [-Werror,-Wtautological-pointer-compare]
| Log |
|
6 errors
