https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66452
Bug ID: 66452
Summary: [6 Regression] [UBSAN] *.Lubsan_data0' defined but not
used
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: sanitizer
Assignee: unassigned at gcc dot gnu.org
Reporter: dimhen at gmail dot com
CC: dodji at gcc dot gnu.org, dvyukov at gcc dot gnu.org,
jakub at gcc dot gnu.org, kcc at gcc dot gnu.org
Target Milestone: ---
r224060 PASS
r224193 FAIL
$ g++ -Wall -O0 -fsanitize=undefined -c x.ii -fpreprocessed -o x.o
x.ii: In member function 'A B::m_fn1() const':
x.ii:9:12: warning: unused variable 'i' [-Wunused-variable]
for (int i;;)
^
At global scope:
cc1plus: warning: '*.Lubsan_data0' defined but not used [-Wunused-variable]
$ cat x.ii
class A {
public:
A(int);
};
class B {
A m_fn1() const;
};
A B::m_fn1() const {
for (int i;;)
;
return 0;
}
$ g++ -v
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/usr/local/gcc_current/libexec/gcc/x86_64-unknown-linux-gnu/6.0.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: /home/dimhen/src/gcc_current/configure
--prefix=/usr/local/gcc_current --enable-static
--enable-checking=yes,df,fold,rtl --enable-languages=c,c++,lto --enable-plugin
--disable-libstdcxx-dual-abi --disable-multilib
Thread model: posix
gcc version 6.0.0 20150606 (experimental) [trunk revision 224193] (GCC)
$ ~/bin/gcc_224060_rls/bin/g++ -v
Using built-in specs.
COLLECT_GCC=/home/dimhen/bin/gcc_224060_rls/bin/g++
COLLECT_LTO_WRAPPER=/home/dimhen/bin/gcc_224060_rls/bin/../libexec/gcc/x86_64-unknown-linux-gnu/6.0.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: /home/dimhen/src/gcc_r224060/configure
--prefix=/usr/local/gcc_current --enable-static --enable-checking=release
--enable-languages=c,c++,lto --enable-plugin --disable-libstdcxx-dual-abi
--disable-multilib
Thread model: posix
gcc version 6.0.0 20150603 (experimental) [trunk revision 224060] (GCC)
