在 2023/5/4 17:45, Georg-Johann Lay 写道:
My question: Is this a GCC problem, or a problem with the code and sequence points?
I recommend you learn about smart pointers and stop managing object lifetime by hand. lh_mouse@lhmouse-xps ~/Desktop $ g++-12 test.cc -fsanitize=address,undefined -g -O2 lh_mouse@lhmouse-xps ~/Desktop $ ./a.out ===================================================================75277==ERROR: AddressSanitizer: heap-use-after-free on address 0x602000000030 at pc 0x55629bb062b1 bp 0x7ffe92a56000 sp 0x7ffe92a55ff0
READ of size 8 at 0x602000000030 thread T0
#0 0x55629bb062b0 in main /home/lh_mouse/Desktop/test.cc:33
#1 0x7f6d4aff8d8f in __libc_start_call_main ../sysdeps/nptl/libc_start_call_main.h:58
#2 0x7f6d4aff8e3f in __libc_start_main_impl ../csu/libc-start.c:392
#3 0x55629bb06394 in _start (/home/lh_mouse/Desktop/a.out+0x2394)
0x602000000030 is located 0 bytes inside of 8-byte region [0x602000000030,0x602000000038)
freed by thread T0 here:
#0 0x7f6d4bc20530 in operator delete(void*, unsigned long)
../../../../src/libsanitizer/asan/asan_new_delete.cpp:164
#1 0x55629bb0626d in Lexer::~Lexer() /home/lh_mouse/Desktop/test.cc:20
#2 0x55629bb0626d in main /home/lh_mouse/Desktop/test.cc:33
previously allocated by thread T0 here:
#0 0x7f6d4bc1f488 in operator new(unsigned long)
../../../../src/libsanitizer/asan/asan_new_delete.cpp:95
#1 0x55629bb061cc in main /home/lh_mouse/Desktop/test.cc:31
--
Best regards,
LIU Hao
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