http://llvm.org/bugs/show_bug.cgi?id=2815
Summary: escaped chars in string literal cause incorrect caret
position in diagnostic messages
Product: clang
Version: unspecified
Platform: All
OS/Version: All
Status: NEW
Severity: trivial
Priority: P2
Component: Basic
AssignedTo: [EMAIL PROTECTED]
ReportedBy: [EMAIL PROTECTED]
CC: [email protected]
Given the following code...
main() {
printf("\0");
printf("\n\0");
printf("\n\n\0");
printf("\n\n\n\0");
return 0;
}
...clang (r56415) produces the following diagnostics...
c.c:2:9: warning: format string contains '\0' within the string body
printf("\0");
~^~~
c.c:3:10: warning: format string contains '\0' within the string body
printf("\n\0");
~~^~~~
c.c:4:11: warning: format string contains '\0' within the string body
printf("\n\n\0");
~~~^~~~~
c.c:5:12: warning: format string contains '\0' within the string body
printf("\n\n\n\0");
~~~~^~~~~~
4 diagnostics generated.
Note that the carets are pointing to the wrong positions in all cases except
the first. Whatever code determines the caret's position (and length?) seems
to be treating escaped characters as only taking up one char in the source
code. The same problem is seen with "\xNN" (hex) and "\NNN" (octal) escapes.
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