https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95889
Bug ID: 95889
Summary: corrupt size vs. prev_size and hang when using
__has_include with -traditional-cpp
Product: gcc
Version: 10.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: preprocessor
Assignee: unassigned at gcc dot gnu.org
Reporter: dev-zero at gentoo dot org
Target Milestone: ---
Part of my testing for issues like https://github.com/evaleev/libint/issues/173
with GCC 10.1 I came up with a silly test header:
****snip****
#if defined __has_include
# if __has_include(<stdio.h>)
hello there
# endif
#endif
****snip****
which works as expected with `cpp test.h`:
****snip****
# 1 "test.h"
# 1 "<built-in>"
# 1 "<command-line>"
# 31 "<command-line>"
# 1 "/usr/include/stdc-predef.h" 1 3 4
# 32 "<command-line>" 2
# 1 "test.h"
hello there
****snip****
But gives the following and hangs when running with `cpp -traditional-cpp
test.h`:
****snip****
# 1 "test.h"
# 1 "<built-in>"
# 1 "<command-line>"
# 31 "<command-line>"
# 1 "/usr/include/stdc-predef.h" 1 3 4
# 17 "/usr/include/stdc-predef.h" 3 4
[...]
# 32 "<command-line>" 2
# 1 "test.h"
test.h:3: error: missing '(' before "__has_include" operand
3 | # if __has_include(<stdio.h>)
|
test.h:3: error: operator "__has_include" requires a header-name
test.h:3: warning: null character(s) ignored
test.h:3: error: missing binary operator before token "q"
*** Error in
`/data/tiziano/cp2k/tools/toolchain/install/gcc-10.1.0/lib/gcc/x86_64-pc-linux-gnu/10.1.0/cc1':
corrupted size vs. prev_size: 0x0000000002a517a0 ***
test.h:1: confused by earlier errors, bailing out
****snip****
Besides this issue with the compiler itself, I wonder what the correct
invocation of `__has_include` in traditional mode is (because it seems to be
defined).
