https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79052
Bug ID: 79052
Summary: bootstrap-ubsan failures due to warnings
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: bootstrap
Assignee: unassigned at gcc dot gnu.org
Reporter: msebor at gcc dot gnu.org
Target Milestone: ---
While verifying fixes for bug 79029 and bug 78608 I see the following errors
during bootstrap-ubsan (there might be others, these were just the first few
that showed up in a parallel build before it stopped).
/opt/notnfs/msebor/src/gcc/trunk/gcc/dwarf2out.c:2060:37: error: comparison
between signed and unsigned integer expressions [-Werror=sign-compare]
gcc_assert (val1->v.val_unsigned == DWARF2_ADDR_SIZE);
/opt/notnfs/msebor/src/gcc/trunk/gcc/system.h:731:14: note: in definition of
macro ‘gcc_assert’
((void)(!(EXPR) ? fancy_abort (__FILE__, __LINE__, __FUNCTION__), 0 : 0))
^~~~
...
/opt/notnfs/msebor/src/gcc/trunk/gcc/c/gimple-parser.c: In function ‘void
c_parser_parse_gimple_body(c_parser*)’:
/opt/notnfs/msebor/src/gcc/trunk/gcc/c/gimple-parser.c:1301:34: error:
‘exp1.c_expr::value’ may be used uninitialized in this function
[-Werror=maybe-uninitialized]
case_label = build_case_label (exp1.value, NULL_TREE,
~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
decl);
~~~~~
/opt/notnfs/msebor/src/gcc/trunk/gcc/c/gimple-parser.c:1283:10: note:
‘exp1.c_expr::value’ was declared here
c_expr exp1;
^~~~
/opt/notnfs/msebor/src/gcc/trunk/gcc/c/gimple-parser.c:1377:49: error:
‘cond_expr.c_expr::value’ may be used uninitialized in this function
[-Werror=maybe-uninitialized]
gimple_seq_add_stmt (seq, gimple_build_switch (cond_expr.value,
~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~
default_label, labels));
~~~~~~~~~~~~~~~~~~~~~~
/opt/notnfs/msebor/src/gcc/trunk/gcc/c/gimple-parser.c:1255:10: note:
‘cond_expr.c_expr::value’ was declared here
c_expr cond_expr;
^~~~~~~~~
...
/opt/notnfs/msebor/src/gcc/trunk/gcc/c-family/c-cppbuiltin.c: In function ‘void
c_cpp_builtins(cpp_reader*)’:
/opt/notnfs/msebor/src/gcc/trunk/gcc/c-family/c-cppbuiltin.c:848:1: error: ‘%s’
directive argument is null [-Werror=format-length=]
c_cpp_builtins (cpp_reader *pfile)
^~~~~~~~~~~~~~
...
/opt/notnfs/msebor/src/gcc/trunk/gcc/c/c-typeck.c: In function ‘char*
print_spelling(char*)’:
/opt/notnfs/msebor/src/gcc/trunk/gcc/c/c-typeck.c:7022:59: error: null
destination pointer [-Werror=format-length=]
sprintf (d, "[" HOST_WIDE_INT_PRINT_UNSIGNED "]", p->u.i);
^
