https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64632
Bug ID: 64632
Summary: runtime error: member call on address 0x0000004318a8
which does not point to an object of type 'ios_base'
Product: gcc
Version: 5.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: trippels at gcc dot gnu.org
Created attachment 34465
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=34465&action=edit
testcase
markus@x4 ~ % g++ -fsanitize=undefined -O2 bench.cpp
markus@x4 ~ % ./a.out
size array vector_point vector_iters deque
list set multiset
/usr/lib/gcc/x86_64-pc-linux-gnu/5.0.0/include/g++-v5/bits/ios_base.h:1037:16:
runtime error: member call on address 0x0000004318a8 which does not point to an
object of type 'ios_base'
0x0000004318a0: note: object is base class subobject at offset 8 within object
of type 'std::ostream'
00 00 00 00 a8 17 ce 25 ca 7f 00 00 d0 17 ce 25 ca 7f 00 00 06 00 00 00 00
00 00 00 00 00 00 00
^ ~~~~~~~~~~~~~~~~~~~~~~~
vptr for '<unknown>' base class of
'std::ostream'
/usr/lib/gcc/x86_64-pc-linux-gnu/5.0.0/include/g++-v5/iomanip:210:7: runtime
error: member call on address 0x0000004318a8 which does not point to an object
of type 'ios_base'
0x0000004318a0: note: object is base class subobject at offset 8 within object
of type 'std::ostream'
00 00 00 00 a8 17 ce 25 ca 7f 00 00 d0 17 ce 25 ca 7f 00 00 06 00 00 00 00
00 00 00 00 00 00 00
^ ~~~~~~~~~~~~~~~~~~~~~~~
vptr for '<unknown>' base class of
'std::ostream'
10 0.23 0.23 0.41 0.77
1.57 0.97 1.44
^C
markus@x4 ~ % clang++ -fsanitize=undefined -O2 bench.cpp
markus@x4 ~ % ./a.out
size array vector_point vector_iters deque
list set multiset
/usr/lib64/gcc/x86_64-pc-linux-gnu/5.0.0/include/g++-v5/bits/ios_base.h:102:24:
runtime error: load of value 4294967035, which is not a valid value for type
'std::_Ios_Fmtflags'
/usr/lib64/gcc/x86_64-pc-linux-gnu/5.0.0/include/g++-v5/bits/ios_base.h:82:67:
runtime error: load of value 4294967035, which is not a valid value for type
'std::_Ios_Fmtflags'
10 0.26 0.28 0.51 2.13
3.81 1.26 2.04
^C
