https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122137
Bug ID: 122137
Summary: Testcase gfortran.dg/pdt_46.f03 fails with
-fsanitize=address
Product: gcc
Version: 16.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: anlauf at gcc dot gnu.org
Target Milestone: ---
After having seen that this testcase fails on x86_64-apple-darwin17, see
https://gcc.gnu.org/pipermail/gcc-testresults/2025-October/858685.html
I tried to reproduce this in some way.
% gfc-16 -g pdt_46.f03 -O2 -Wall -fsanitize=addresspdt_46.f03:52:17:
52 | x = foo(5)(a)
| ^
Warning: 'x_8->vec.data' may be used uninitialized [-Wmaybe-uninitialized]
pdt_46.f03:55:9:
55 | y = x
| ^
Warning: 'y_32->vec.data' may be used uninitialized [-Wmaybe-uninitialized]
And running it:
% ./a.out
Program received signal SIGSEGV: Segmentation fault - invalid memory reference.
Backtrace for this error:
#0 0x7fb98c0578ff in ???
#1 0x7fb98c8472da in
_ZN11__sanitizer30atomic_compare_exchange_strongINS_14atomic_uint8_tEEEbPVT_PNS2_4TypeES5_NS_12memory_orderE
at
../../../../gcc-trunk/libsanitizer/sanitizer_common/sanitizer_atomic_clang.h:84
#2 0x7fb98c8472da in
_ZN6__asan9Allocator38AtomicallySetQuarantineFlagIfAllocatedEPNS_9AsanChunkEPvPN11__sanitizer18BufferedStackTraceE
at ../../../../gcc-trunk/libsanitizer/asan/asan_allocator.cpp:668
#3 0x7fb98c8472da in
_ZN6__asan9Allocator10DeallocateEPvmmPN11__sanitizer18BufferedStackTraceENS_9AllocTypeE
at ../../../../gcc-trunk/libsanitizer/asan/asan_allocator.cpp:732
#4 0x7fb98c91df28 in ___interceptor_free
at ../../../../gcc-trunk/libsanitizer/asan/asan_malloc_linux.cpp:52
#5 0x40144f in main2
at /home/anlauf/gcc-bugs/pdt_46.f03:52
#6 0x40144f in test
at /home/anlauf/gcc-bugs/pdt_46.f03:32
#7 0x40144f in main
at /home/anlauf/gcc-bugs/pdt_46.f03:29
Segmentation fault
