A double semi-colon will cause the misleading-indentation warning to miss that a second indented statement is not part by the condiational block.

#include <stdio.h>

int main(void) {
    if (1)
        printf("%s", "true);;
        return 0;
    return 1;

Removing the extranious semi-colon from the printf() call will correct the problem and gcc will emit a warning as expected.

I've tested with 11.3.1 and 12.1.0, and with clang 14, which has the same behavior. This was noticed through a macro that adds a semi-colon in the macro definition, and then has a semi-colon following the call to the macro.