| Issue |
63301
|
| Summary |
[clang-analyzer-deadcode.DeadStores] false positive for local constexpr c-string captured by lambda
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
R2RT
|
Local `constexpr` c-string used only in lambda yields false positive about dead store.
Minimal repro: https://godbolt.org/z/qr8zGeGsv
```c++
int main() {
constexpr auto constexprlocal = "c"; // warning: Value stored to 'constexprlocal' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
auto callback = []() {
return constexprlocal[0];
};
return callback();
}
```
More cases repro: https://godbolt.org/z/GqG8svY9o
```c++
#include <iostream>
constexpr auto constexprglobal = "a";
auto global = "a";
int main() {
auto local = "b";
constexpr auto constexprlocal = "c"; // warning: Value stored to 'constexprlocal' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
constexpr auto constexprlocalint = 11;
auto callback = [&]() {
std::cout
<< constexprglobal
<< global
<< constexprlocal
<< local
<< constexprlocalint
;
};
callback();
return 0;
}
```
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