printf g format specifier doesn't match the C standard behaviour
[nix-shell:/tmp]$ clang printg.c && ./a.out && cat printg.c
3122.55
#include <stdio.h>
int main(void) {
printf("%.16g\n", 3122.55);
}
[nix-shell:/tmp]$ runhaskell printg.hs && cat printg.hs
3122.5500000000000000
import Text.Printf (printf)
main = printf "%.16g\n" (3122.55 :: Double)Some more info here https://stackoverflow.com/questions/54162152/what-precisely-does-the-g-printf-specifier-mean
Notably I'd expect GHC to give me the same answer as the shown C program.
Trac metadata
| Trac field | Value |
|---|---|
| Version | 8.6.3 |
| Type | Bug |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | Core Libraries |
| Test case | |
| Differential revisions | |
| BlockedBy | |
| Related | |
| Blocking | |
| CC | |
| Operating system | |
| Architecture |