https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66317
Bug ID: 66317
Summary: Preprocessor chokes on __FILE__ containing a newline
Product: gcc
Version: 5.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: preprocessor
Assignee: unassigned at gcc dot gnu.org
Reporter: Keith.S.Thompson at gmail dot com
Target Milestone: ---
This is an obscure problem, unlikely to occur in the real world.
I do not suggest handling it "correctly", whatever that might mean,
just detecting it and terminating with a reasonable error message.
The problem can also occur if the actual file name contains a newline.
System: Linux Mint 17.
gcc version 5.1.0, built from source with:
gcc-5.1.0/configure --prefix=/usr/local/apps/gcc-5.1.0 --disable-multilib
Test case (a 2 line source file named "filename_bug.c"):
#line 1 "new\nline.c"
const char filename[] = __FILE__;
Output of "cpp filename_bug.c" (there is no newline on the last line of
output):
# 1 "filename_bug.c"
# 1 "<built-in>"
# 1 "<command-line>"
# 1 "/usr/include/stdc-predef.h" 1 3 4
# 1 "<command-line>" 2
# 1 "filename_bug.c"
# 1 "new
line.c"
new
line.c:1:1: warning: missing terminating " character
new
line.c:1:25: internal compiler error: invalid built-in macro "__FILE__"
0x6449a8 c_cpp_error(cpp_reader*, int, int, unsigned int, unsigned int, char
const*, __va_list_tag (*) [1])
../gcc-5.1.0/gcc/c-family/c-common.c:10029
0xf6664a cpp_diagnostic
../gcc-5.1.0/libcpp/errors.c:60
0xf66776 cpp_error(cpp_reader*, int, char const*, ...)
../gcc-5.1.0/libcpp/errors.c:75
0xf74158 builtin_macro
../gcc-5.1.0/libcpp/macro.c:471
0xf748ed enter_macro_context
../gcc-5.1.0/libcpp/macro.c:1247
0xf7643d cpp_get_token_1
../gcc-5.1.0/libcpp/macro.c:2526
0x65830f scan_translation_unit
../gcc-5.1.0/gcc/c-family/c-ppoutput.c:192
0x65830f preprocess_file(cpp_reader*)
../gcc-5.1.0/gcc/c-family/c-ppoutput.c:113
0x656c80 c_common_init()
../gcc-5.1.0/gcc/c-family/c-opts.c:1033
0x5cb33e lang_dependent_init
../gcc-5.1.0/gcc/toplev.c:1845
0x5cb33e do_compile
../gcc-5.1.0/gcc/toplev.c:2062
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
const char filename[] =
