MultiSource/Applications/d: applying zero offset to null pointer is UB in C
Caught by https://reviews.llvm.org/D67122
Address of the zero-th element of an array is identical
to the address of the array base pointer (&a[0] == a),
so let's just not apply zero offset.
llvm-test-suite/MultiSource/Applications/d/parse.c:1588:20: runtime error: applying zero offset to null pointer
#0 0x251be9 in commit_tree (/builddirs/build-test-suite-old/MultiSource/Applications/d/make_dparser+0x251be9)
#1 0x2515b4 in commit_tree (/builddirs/build-test-suite-old/MultiSource/Applications/d/make_dparser+0x2515b4)
#2 0x2515b4 in commit_tree (/builddirs/build-test-suite-old/MultiSource/Applications/d/make_dparser+0x2515b4)
#3 0x2515b4 in commit_tree (/builddirs/build-test-suite-old/MultiSource/Applications/d/make_dparser+0x2515b4)
#4 0x2515b4 in commit_tree (/builddirs/build-test-suite-old/MultiSource/Applications/d/make_dparser+0x2515b4)
#5 0x2515b4 in commit_tree (/builddirs/build-test-suite-old/MultiSource/Applications/d/make_dparser+0x2515b4)
#6 0x2515b4 in commit_tree (/builddirs/build-test-suite-old/MultiSource/Applications/d/make_dparser+0x2515b4)
#7 0x2515b4 in commit_tree (/builddirs/build-test-suite-old/MultiSource/Applications/d/make_dparser+0x2515b4)
#8 0x2515b4 in commit_tree (/builddirs/build-test-suite-old/MultiSource/Applications/d/make_dparser+0x2515b4)
#9 0x2515b4 in commit_tree (/builddirs/build-test-suite-old/MultiSource/Applications/d/make_dparser+0x2515b4)
#10 0x2515b4 in commit_tree (/builddirs/build-test-suite-old/MultiSource/Applications/d/make_dparser+0x2515b4)
#11 0x2515b4 in commit_tree (/builddirs/build-test-suite-old/MultiSource/Applications/d/make_dparser+0x2515b4)
#12 0x2515b4 in commit_tree (/builddirs/build-test-suite-old/MultiSource/Applications/d/make_dparser+0x2515b4)
#13 0x253e87 in commit_stack (/builddirs/build-test-suite-old/MultiSource/Applications/d/make_dparser+0x253e87)
#14 0x253e44 in commit_stack (/builddirs/build-test-suite-old/MultiSource/Applications/d/make_dparser+0x253e44)
#15 0x250ef1 in exhaustive_parse (/builddirs/build-test-suite-old/MultiSource/Applications/d/make_dparser+0x250ef1)
#16 0x24facd in dparse (/builddirs/build-test-suite-old/MultiSource/Applications/d/make_dparser+0x24facd)
#17 0x2441b0 in parse_grammar (/builddirs/build-test-suite-old/MultiSource/Applications/d/make_dparser+0x2441b0)
#18 0x23a270 in main (/builddirs/build-test-suite-old/MultiSource/Applications/d/make_dparser+0x23a270)
#19 0x7fac77faebba in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x26bba)
#20 0x21aeb9 in _start (/builddirs/build-test-suite-old/MultiSource/Applications/d/make_dparser+0x21aeb9)
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /repositories/llvm-test-suite/MultiSource/Applications/d/parse.c:1588:20 in
llvm-svn: 373486
1 file changed
