http://llvm.org/bugs/show_bug.cgi?id=9751
Summary: -Wformat doesn't point to the callsite when format
string is a variable
Product: clang
Version: trunk
Platform: PC
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P
Component: -New Bugs
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
$ cat testcases/format.c
#include <stdio.h>
const char kFormatStr[] = "%d %s\n";
void f() {
printf(kFormatStr, 0);
printf(kFormatStr, 1);
}
$ clang -fsyntax-only -Wformat testcases/format.c
testcases/format.c:3:32: warning: more '%' conversions than data arguments
[-Wformat]
const char kFormatStr[] = "%d %s\n";
~^
testcases/format.c:3:32: warning: more '%' conversions than data arguments
[-Wformat]
const char kFormatStr[] = "%d %s\n";
~^
So, we correctly identify the extra conversion specifier, but don't print any
source location information for the callsites that are missing arguments! In
this case, I'd prefer for the primary source location to be the callsite, with
the format string definition given in a note.
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