From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 31CA3385801F; Fri, 11 Feb 2022 15:17:46 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 31CA3385801F From: "zsojka at seznam dot cz" To: gcc-bugs@gcc.gnu.org Subject: [Bug c/104505] New: ICE: SIGSEGV in c_pretty_printer::postfix_expression() on invalid code Date: Fri, 11 Feb 2022 15:17:45 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: c X-Bugzilla-Version: 12.0 X-Bugzilla-Keywords: ice-on-invalid-code X-Bugzilla-Severity: normal X-Bugzilla-Who: zsojka at seznam dot cz X-Bugzilla-Status: UNCONFIRMED X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version bug_status keywords bug_severity priority component assigned_to reporter target_milestone cf_gcchost cf_gcctarget attachments.created Message-ID: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: gcc-bugs@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-bugs mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 11 Feb 2022 15:17:46 -0000 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D104505 Bug ID: 104505 Summary: ICE: SIGSEGV in c_pretty_printer::postfix_expression() on invalid code Product: gcc Version: 12.0 Status: UNCONFIRMED Keywords: ice-on-invalid-code Severity: normal Priority: P3 Component: c Assignee: unassigned at gcc dot gnu.org Reporter: zsojka at seznam dot cz Target Milestone: --- Host: x86_64-pc-linux-gnu Target: x86_64-pc-linux-gnu Created attachment 52417 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=3D52417&action=3Dedit reduced testcase Compiler output: $ x86_64-pc-linux-gnu-gcc testcase.c -wrapper valgrind,-q =3D=3D19778=3D=3D Invalid read of size 2 =3D=3D19778=3D=3D at 0xDF9304: c_pretty_printer::postfix_expression(tree= _node*) (c-pretty-print.cc:1584) =3D=3D19778=3D=3D by 0xDF9859: c_pretty_printer::postfix_expression(tree= _node*) (c-pretty-print.cc:1604) =3D=3D19778=3D=3D by 0xD5842D: c_tree_printer (c-objc-common.cc:308) =3D=3D19778=3D=3D by 0xD5842D: c_tree_printer(pretty_printer*, text_info= *, char const*, int, bool, bool, bool, bool*, char const**) (c-objc-common.cc:258) =3D=3D19778=3D=3D by 0x253CE9C: pp_format(pretty_printer*, text_info*) (pretty-print.cc:1475) =3D=3D19778=3D=3D by 0x251ED02: diagnostic_report_diagnostic(diagnostic_= context*, diagnostic_info*) (diagnostic.cc:1384) =3D=3D19778=3D=3D by 0x251F287: diagnostic_impl(rich_location*, diagnost= ic_metadata const*, int, char const*, __va_list_tag (*) [1], diagnostic_t) (diagnostic.cc:1546) =3D=3D19778=3D=3D by 0x251FC3F: error_at(unsigned int, char const*, ...) (diagnostic.cc:1869) =3D=3D19778=3D=3D by 0xDCB5D0: c_build_shufflevector(unsigned int, tree_= node*, tree_node*, vec const&, bool) (c-common.cc:118= 9) =3D=3D19778=3D=3D by 0xD66819: c_parser_postfix_expression(c_parser*) (c-parser.cc:10075) =3D=3D19778=3D=3D by 0xD687AA: c_parser_unary_expression(c_parser*) (c-parser.cc:8261) =3D=3D19778=3D=3D by 0xD69F41: c_parser_cast_expression(c_parser*, c_exp= r*) (c-parser.cc:8103) =3D=3D19778=3D=3D by 0xD6A1AE: c_parser_binary_expression(c_parser*, c_e= xpr*, tree_node*) (c-parser.cc:7906) =3D=3D19778=3D=3D Address 0x0 is not stack'd, malloc'd or (recently) free'd =3D=3D19778=3D=3D=20 ' In function 'foo': Segmentation fault 9 | u =3D __builtin_shufflevector (u, u, __builtin_convertvector (v, = U)); | ^ 0x13994df crash_signal /repo/gcc-trunk/gcc/toplev.cc:322 0xdf9304 c_pretty_printer::postfix_expression(tree_node*) /repo/gcc-trunk/gcc/c-family/c-pretty-print.cc:1584 0xdf9859 c_pretty_printer::postfix_expression(tree_node*) /repo/gcc-trunk/gcc/c-family/c-pretty-print.cc:1604 0xd5842d c_tree_printer /repo/gcc-trunk/gcc/c/c-objc-common.cc:308 0xd5842d c_tree_printer /repo/gcc-trunk/gcc/c/c-objc-common.cc:258 0x253ce9c pp_format(pretty_printer*, text_info*) /repo/gcc-trunk/gcc/pretty-print.cc:1475 0x251ed02 diagnostic_report_diagnostic(diagnostic_context*, diagnostic_info= *) /repo/gcc-trunk/gcc/diagnostic.cc:1384 0x251f287 diagnostic_impl /repo/gcc-trunk/gcc/diagnostic.cc:1546 0x251fc3f error_at(unsigned int, char const*, ...) /repo/gcc-trunk/gcc/diagnostic.cc:1869 0xdcb5d0 c_build_shufflevector(unsigned int, tree_node*, tree_node*, vec const&, bool) /repo/gcc-trunk/gcc/c-family/c-common.cc:1189 0xd66819 c_parser_postfix_expression /repo/gcc-trunk/gcc/c/c-parser.cc:10075 0xd687aa c_parser_unary_expression /repo/gcc-trunk/gcc/c/c-parser.cc:8261 0xd69f41 c_parser_cast_expression /repo/gcc-trunk/gcc/c/c-parser.cc:8103 0xd6a1ae c_parser_binary_expression /repo/gcc-trunk/gcc/c/c-parser.cc:7906 0xd6b63b c_parser_conditional_expression /repo/gcc-trunk/gcc/c/c-parser.cc:7606 0xd6be60 c_parser_expr_no_commas /repo/gcc-trunk/gcc/c/c-parser.cc:7521 0xd6bf1b c_parser_expr_no_commas /repo/gcc-trunk/gcc/c/c-parser.cc:7564 0xd6c0d1 c_parser_expression /repo/gcc-trunk/gcc/c/c-parser.cc:10697 0xd6c838 c_parser_expression_conv /repo/gcc-trunk/gcc/c/c-parser.cc:10736 0xd61817 c_parser_statement_after_labels /repo/gcc-trunk/gcc/c/c-parser.cc:6263 Please submit a full bug report, with preprocessed source (by using -freport-bug). Please include the complete backtrace with any bug report. See for instructions. Compiling as C++ doesn't ICE, though the diagnostics exposes gcc internals: $ x86_64-pc-linux-gnu-gcc -xc++ testcase.c testcase.c: In function 'void foo(V)': testcase.c:9:7: error: invalid element index 'VEC_CONVERT(v)' to '__builtin_shufflevector' 9 | u =3D __builtin_shufflevector (u, u, __builtin_convertvector (v, = U)); | ^~~~~~~~~~~~~~~~~~~~~~~ $ x86_64-pc-linux-gnu-gcc -v Using built-in specs. COLLECT_GCC=3D/repo/gcc-trunk/binary-latest-amd64/bin/x86_64-pc-linux-gnu-g= cc COLLECT_LTO_WRAPPER=3D/repo/gcc-trunk/binary-trunk-r12-7199-20220211084605-= gcc68ad87014-checking-yes-rtl-df-extra-nobootstrap-amd64/bin/../libexec/gcc= /x86_64-pc-linux-gnu/12.0.1/lto-wrapper Target: x86_64-pc-linux-gnu Configured with: /repo/gcc-trunk//configure --enable-languages=3Dc,c++ --enable-valgrind-annotations --disable-nls --enable-checking=3Dyes,rtl,df,= extra --disable-bootstrap --with-cloog --with-ppl --with-isl --build=3Dx86_64-pc-linux-gnu --host=3Dx86_64-pc-linux-gnu --target=3Dx86_64-pc-linux-gnu --with-ld=3D/usr/bin/x86_64-pc-linux-gnu-ld --with-as=3D/usr/bin/x86_64-pc-linux-gnu-as --disable-libstdcxx-pch --prefix=3D/repo/gcc-trunk//binary-trunk-r12-7199-20220211084605-gcc68ad870= 14-checking-yes-rtl-df-extra-nobootstrap-amd64 Thread model: posix Supported LTO compression algorithms: zlib zstd gcc version 12.0.1 20220211 (experimental) (GCC)=