test suite failures with expensive hardening.
Building master [fb9c9e04f002fbbd9745911a17481b49ed66c9f4] with --enable-gcc-warnings --disable-silent-rules --enable-expensive-hardening,
```
16:59:04 =============================================
16:59:04 tor 0.2.9.0-alpha-dev: ./test-suite.log
16:59:04 =============================================
16:59:04
16:59:04 # TOTAL: 9
16:59:04 # PASS: 6
16:59:04 # SKIP: 1
16:59:04 # XFAIL: 0
16:59:04 # FAIL: 2
16:59:04 # XPASS: 0
16:59:04 # ERROR: 0
16:59:04
16:59:04 .. contents:: :depth: 2
16:59:04
16:59:04 FAIL: src/test/test-memwipe
16:59:04 ===========================
16:59:04
16:59:04 =================================================================
16:59:04 ==28523==ERROR: AddressSanitizer: stack-buffer-overflow on address 0x7ffec6e913d0 at pc 0x7fc25b0fdb29 bp 0x7ffec6e90f60 sp 0x7ffec6e90f58
16:59:04 READ of size 1 at 0x7ffec6e913d0 thread T0
16:59:04 #0 0x7fc25b0fdb28 in vmemeq ../src/test/test-memwipe.c:66
16:59:04 #1 0x7fc25b0fdb28 in check_a_buffer ../src/test/test-memwipe.c:88
16:59:04 #2 0x7fc25b0fc0c0 in main ../src/test/test-memwipe.c:180
16:59:04 #3 0x7fc257a66b44 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x21b44)
16:59:04 #4 0x7fc25b0fd5ea (/srv/jenkins-workspace/workspace/tor-ci-linux-master/ARCHITECTURE/amd64/SUITE/jessie/build-tree-tor/src/test/test-memwipe+0x1545ea)
16:59:04
16:59:04 Address 0x7ffec6e913d0 is located in stack of thread T0 at offset 1056 in frame
16:59:04 #0 0x7fc25b0fd8af in check_a_buffer ../src/test/test-memwipe.c:74
16:59:04
16:59:04 This frame has 1 object(s):
16:59:04 [32, 1056) 'buf' <== Memory access at offset 1056 overflows this variable
16:59:04 HINT: this may be a false positive if your program uses some custom stack unwind mechanism or swapcontext
16:59:04 (longjmp and C++ exceptions *are* supported)
16:59:04 SUMMARY: AddressSanitizer: stack-buffer-overflow ../src/test/test-memwipe.c:66 vmemeq
16:59:04 Shadow bytes around the buggy address:
16:59:04 0x100058dca220: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
16:59:04 0x100058dca230: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
16:59:04 0x100058dca240: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
16:59:04 0x100058dca250: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
16:59:04 0x100058dca260: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
16:59:04 =>0x100058dca270: 00 00 00 00 00 00 00 00 00 00[f3]f3 f3 f3 00 00
16:59:04 0x100058dca280: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1
16:59:04 0x100058dca290: f1 f1 00 00 00 f4 00 00 00 00 00 00 00 00 00 00
16:59:04 0x100058dca2a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
16:59:04 0x100058dca2b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
16:59:04 0x100058dca2c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
16:59:04 Shadow byte legend (one shadow byte represents 8 application bytes):
16:59:04 Addressable: 00
16:59:04 Partially addressable: 01 02 03 04 05 06 07
16:59:04 Heap left redzone: fa
16:59:04 Heap right redzone: fb
16:59:04 Freed heap region: fd
16:59:04 Stack left redzone: f1
16:59:04 Stack mid redzone: f2
16:59:04 Stack right redzone: f3
16:59:04 Stack partial redzone: f4
16:59:04 Stack after return: f5
16:59:04 Stack use after scope: f8
16:59:04 Global redzone: f9
16:59:04 Global init order: f6
16:59:04 Poisoned by user: f7
16:59:04 Contiguous container OOB:fc
16:59:04 ASan internal: fe
16:59:04 ==28523==ABORTING
16:59:04
16:59:04 SKIP: src/test/test_switch_id.sh
16:59:04 ================================
16:59:04
16:59:04 This test only works when run as root. Skipping.
16:59:04
16:59:04 FAIL: src/test/test_bt.sh
16:59:04 =========================
16:59:04
16:59:04 OK
16:59:04 ../src/test/test_bt_cl.c:39:24: runtime error: store to null pointer of type 'volatile int'
16:59:04 ASAN:SIGSEGV
16:59:04 =================================================================
16:59:04 ==28713==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000000 (pc 0x7f9c360d73b4 sp 0x7fff3cd6cd20 bp 0x7fff3cd6cd40 T0)
16:59:04 #0 0x7f9c360d73b3 in crash ../src/test/test_bt_cl.c:39
16:59:04 #1 0x7f9c360d73f0 in oh_what ../src/test/test_bt_cl.c:58
16:59:04 #2 0x7f9c360d7441 in a_tangled_web ../src/test/test_bt_cl.c:64
16:59:04 #3 0x7f9c360d7490 in we_weave ../src/test/test_bt_cl.c:70
16:59:04 #4 0x7f9c360d6a74 in main ../src/test/test_bt_cl.c:119
16:59:04 #5 0x7f9c335d4b44 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x21b44)
16:59:04 #6 0x7f9c360d71ea (/srv/jenkins-workspace/workspace/tor-ci-linux-master/ARCHITECTURE/amd64/SUITE/jessie/build-tree-tor/src/test/test-bt-cl+0x7f1ea)
16:59:04
16:59:04 AddressSanitizer can not provide additional info.
16:59:04 SUMMARY: AddressSanitizer: SEGV ../src/test/test_bt_cl.c:39 crash
16:59:04 ==28713==ABORTING
16:59:04 BAD
```
issue