https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110677
Bug ID: 110677
Summary: UBSAN error: load of value 1818451807, which is not a
valid value for type 'expr_t' when compiling
pr49213.f90
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: jamborm at gcc dot gnu.org
Blocks: 63426
Target Milestone: ---
Host: x86_64-linux-gnu
Target: x86_64-linux-gnu
With master revision r14-2537-g18dac101678b8c and ubsan-bootstrapped compiler,
I am getting the following error when compiling our own test
gcc/testsuite/gfortran.dg/pr49213.f90:
worker@tiber:~/buildworker/tiber-gcc-ubsan/objdir/gcc>
UBSAN_OPTIONS="halt_on_error=1 print_stacktrace=1"
/home/worker/buildworker/tiber-gcc-ubsan/objdir/gcc/testsuite/gfortran3/../../gfortran
-B/home/worker/buildworker/tiber-gcc-ubsan/objdir/gcc/testsuite/gfortran3/../../
-B/home/worker/buildworker/tiber-gcc-ubsan/objdir/x86_64-pc-linux-gnu/./libgfortran/
/home/worker/buildworker/tiber-gcc-ubsan/build/gcc/testsuite/gfortran.dg/pr49213.f90
-fdiagnostics-plain-output -fdiagnostics-plain-output -O0 -pedantic-errors
-B/home/worker/buildworker/tiber-gcc-ubsan/objdir/x86_64-pc-linux-gnu/./libgfortran/.libs
-L/home/worker/buildworker/tiber-gcc-ubsan/objdir/x86_64-pc-linux-gnu/./libgfortran/.libs
-L/home/worker/buildworker/tiber-gcc-ubsan/objdir/x86_64-pc-linux-gnu/./libgfortran/.libs
-L/home/worker/buildworker/tiber-gcc-ubsan/objdir/x86_64-pc-linux-gnu/./libatomic/.libs
-B/home/worker/buildworker/tiber-gcc-ubsan/objdir/x86_64-pc-linux-gnu/./libquadmath/.libs
-L/home/worker/buildworker/tiber-gcc-ubsan/objdir/x86_64-pc-linux-gnu/./libquadmath/.libs
-L/home/worker/buildworker/tiber-gcc-ubsan/objdir/x86_64-pc-linux-gnu/./libquadmath/.libs
-lm -o /tmp/pr49213.exe
/home/worker/buildworker/tiber-gcc-ubsan/build/gcc/fortran/resolve.cc:1401:30:
runtime error: load of value 1818451807, which is not a valid value for type
'expr_t'
#0 0x79124e in resolve_structure_cons
/home/worker/buildworker/tiber-gcc-ubsan/build/gcc/fortran/resolve.cc:1401
#1 0xda4d76 in resolve_generic_f
/home/worker/buildworker/tiber-gcc-ubsan/build/gcc/fortran/resolve.cc:2852
#2 0xda4d76 in resolve_function
/home/worker/buildworker/tiber-gcc-ubsan/build/gcc/fortran/resolve.cc:3367
#3 0xda839e in gfc_resolve_expr(gfc_expr*)
/home/worker/buildworker/tiber-gcc-ubsan/build/gcc/fortran/resolve.cc:7313
#4 0xda839e in gfc_resolve_expr(gfc_expr*)
/home/worker/buildworker/tiber-gcc-ubsan/build/gcc/fortran/resolve.cc:7275
#5 0xdef0e0 in gfc_resolve_code(gfc_code*, gfc_namespace*)
/home/worker/buildworker/tiber-gcc-ubsan/build/gcc/fortran/resolve.cc:12314
#6 0xdfe227 in resolve_codes
/home/worker/buildworker/tiber-gcc-ubsan/build/gcc/fortran/resolve.cc:18027
#7 0xdfe09a in resolve_codes
/home/worker/buildworker/tiber-gcc-ubsan/build/gcc/fortran/resolve.cc:18008
#8 0xd8965a in gfc_resolve(gfc_namespace*)
/home/worker/buildworker/tiber-gcc-ubsan/build/gcc/fortran/resolve.cc:18062
#9 0xd8965a in gfc_resolve(gfc_namespace*)
/home/worker/buildworker/tiber-gcc-ubsan/build/gcc/fortran/resolve.cc:18041
#10 0xd3f387 in resolve_all_program_units
/home/worker/buildworker/tiber-gcc-ubsan/build/gcc/fortran/parse.cc:6862
#11 0xd3f387 in gfc_parse_file()
/home/worker/buildworker/tiber-gcc-ubsan/build/gcc/fortran/parse.cc:7118
#12 0xed0bfe in gfc_be_parse_file
/home/worker/buildworker/tiber-gcc-ubsan/build/gcc/fortran/f95-lang.cc:229
#13 0x2adde20 in compile_file
/home/worker/buildworker/tiber-gcc-ubsan/build/gcc/toplev.cc:444
#14 0xab5e55 in do_compile
/home/worker/buildworker/tiber-gcc-ubsan/build/gcc/toplev.cc:2126
#15 0xab5e55 in toplev::main(int, char**)
/home/worker/buildworker/tiber-gcc-ubsan/build/gcc/toplev.cc:2282
#16 0xab8fb1 in main
/home/worker/buildworker/tiber-gcc-ubsan/build/gcc/main.cc:39
#17 0x7fd8e6557baf in __libc_start_call_main (/lib64/libc.so.6+0x27baf)
(BuildId: 1390809fc3a065502adfa6735d294c2c86aebe4d)
#18 0x7fd8e6557c78 in __libc_start_main_alias_1 (/lib64/libc.so.6+0x27c78)
(BuildId: 1390809fc3a065502adfa6735d294c2c86aebe4d)
#19 0xab93f4 in _start ../sysdeps/x86_64/start.S:115
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63426
[Bug 63426] [meta-bug] Issues found with -fsanitize=undefined
