Crash parsing C++20 constexpr stuff #44695
Description
| Bugzilla Link | 45350 |
| Resolution | FIXED |
| Resolved on | Mar 30, 2020 16:17 |
| Version | trunk |
| OS | Linux |
| Attachments | thread_0-0e75f1.cpp (zipped) |
| CC | @pkubaj,@zygoloid |
| Fixed by commit(s) | llvmorg-11-init-7095-g9a7eda1bece |
Extended Description
While working on my ConstExpr Raytracer, I encountered a clang crash.
The project has 12 'threads' (different translation units). I am only going to attach one as they all have the same output, but it is worth noting in case its related to that.
Command line output:
[14/18] Building CXX object CMakeFiles/cert.dir/src/threads/thread_11.cpp.o FAILED: CMakeFiles/cert.dir/src/threads/thread_11.cpp.o /usr/bin/clang++ -std=c++2a -fconstexpr-steps=2147483647 -O3 -std=gnu++2a -MD -MT CMakeFiles/cert.dir/src/threads/thread_11.cpp.o -MF CMakeFiles/cert.dir/src/threads/thread_11.cpp.o.d -o CMakeFiles/cert.dir/src/threads/thread_11.cpp.o -c /mnt/c/Users/cdgiessen/Documents/projects/cert/cert/src/threads/thread_11.cpp In file included from /mnt/c/Users/cdgiessen/Documents/projects/cert/cert/src/threads/thread_11.cpp:1: In file included from /mnt/c/Users/cdgiessen/Documents/projects/cert/cert/src/threads/threads.h:2: In file included from /mnt/c/Users/cdgiessen/Documents/projects/cert/cert/src/threads/../raytracer.h:5: In file included from /mnt/c/Users/cdgiessen/Documents/projects/cert/cert/src/threads/../vec3.h:5: /mnt/c/Users/cdgiessen/Documents/projects/cert/cert/src/threads/../util.h:316:17: error: cannot combine with previous 'float' declaration specifier float constexpr float asin_series (float x, float sum, int n, float t) ^ /mnt/c/Users/cdgiessen/Documents/projects/cert/cert/src/threads/../util.h:323:41: error: unknown type name 'T' t * x * x * static_cast (n) / (n + 3)); ^ In file included from /mnt/c/Users/cdgiessen/Documents/projects/cert/cert/src/threads/thread_11.cpp:1: In file included from /mnt/c/Users/cdgiessen/Documents/projects/cert/cert/src/threads/threads.h:2: In file included from /mnt/c/Users/cdgiessen/Documents/projects/cert/cert/src/threads/../raytracer.h:11: In file included from /mnt/c/Users/cdgiessen/Documents/projects/cert/cert/src/threads/../shape.h:3: /mnt/c/Users/cdgiessen/Documents/projects/cert/cert/src/threads/../material.h:125:12: error: C++ requires a type specifier for all declarations constexpr DiffuseTex (std::function<Vec3 (Vec3 point, Vec3 normal, UV uv)> func) ~~~~~~~~~ ^ /mnt/c/Users/cdgiessen/Documents/projects/cert/cert/src/threads/../material.h:126:2: error: only constructors take base initializers : Material (VEC3_ZERO), func (func) ^ /mnt/c/Users/cdgiessen/Documents/projects/cert/cert/src/threads/../material.h:131:74: error: unexpected ';' before '}' return { .is_scattered = false, .attenuation = func (point, normal, uv); }; ^ In file included from /mnt/c/Users/cdgiessen/Documents/projects/cert/cert/src/threads/thread_11.cpp:1: In file included from /mnt/c/Users/cdgiessen/Documents/projects/cert/cert/src/threads/threads.h:2: In file included from /mnt/c/Users/cdgiessen/Documents/projects/cert/cert/src/threads/../raytracer.h:12: /mnt/c/Users/cdgiessen/Documents/projects/cert/cert/src/threads/../sphere.h:40:22: error: use of undeclared identifier 'p' float phi = atan2 (p.z, p.x); ^ /mnt/c/Users/cdgiessen/Documents/projects/cert/cert/src/threads/../sphere.h:40:27: error: use of undeclared identifier 'p' float phi = atan2 (p.z, p.x); ^ /mnt/c/Users/cdgiessen/Documents/projects/cert/cert/src/threads/../sphere.h:41:23: error: use of undeclared identifier 'p' float theta = asin (p.y); ^ /mnt/c/Users/cdgiessen/Documents/projects/cert/cert/src/threads/../sphere.h:38:15: error: no return statement in constexpr function constexpr UV get_sphere_uv (Vec3 const& point) const ^ Stack dump: 0. Program arguments: /usr/bin/clang++ -std=c++2a -fconstexpr-steps=2147483647 -O3 -std=gnu++2a -MD -MT CMakeFiles/cert.dir/src/threads/thread_11.cpp.o -MF CMakeFiles/cert.dir/src/threads/thread_11.cpp.o.d -o CMakeFiles/cert.dir/src/threads/thread_11.cpp.o -c /mnt/c/Users/cdgiessen/Documents/projects/cert/cert/src/threads/thread_11.cpp 1. /mnt/c/Users/cdgiessen/Documents/projects/cert/cert/src/threads/thread_11.cpp:4:87: current parser token ';' /usr/lib/x86_64-linux-gnu/libLLVM-11.so.1(_ZN4llvm3sys15PrintStackTraceERNS_11raw_ostreamE+0x1f)[0x7f26bfa9ba7f] /usr/lib/x86_64-linux-gnu/libLLVM-11.so.1(_ZN4llvm3sys17RunSignalHandlersEv+0x50)[0x7f26bfa99d40] /usr/lib/x86_64-linux-gnu/libLLVM-11.so.1(_ZN4llvm3sys15CleanupOnSignalEm+0xdd)[0x7f26bfa9b1cd] /usr/lib/x86_64-linux-gnu/libLLVM-11.so.1(+0x8ef880)[0x7f26bf9ef880] /lib/x86_64-linux-gnu/libpthread.so.0(+0x12890)[0x7f26beef2890] /usr/lib/x86_64-linux-gnu/libclang-cpp.so.11(+0xa3f0b7)[0x7f26bd0bf0b7] /usr/lib/x86_64-linux-gnu/libclang-cpp.so.11(+0xa2adb4)[0x7f26bd0aadb4] /usr/lib/x86_64-linux-gnu/libclang-cpp.so.11(+0xa31bcf)[0x7f26bd0b1bcf] /usr/lib/x86_64-linux-gnu/libclang-cpp.so.11(+0xa2ac2e)[0x7f26bd0aac2e] /usr/lib/x86_64-linux-gnu/libclang-cpp.so.11(+0xa48932)[0x7f26bd0c8932] /usr/lib/x86_64-linux-gnu/libclang-cpp.so.11(+0xa480ce)[0x7f26bd0c80ce] /usr/lib/x86_64-linux-gnu/libclang-cpp.so.11(+0xa8109a)[0x7f26bd10109a] /usr/lib/x86_64-linux-gnu/libclang-cpp.so.11(+0xa2fa44)[0x7f26bd0afa44] /usr/lib/x86_64-linux-gnu/libclang-cpp.so.11(+0xa79e88)[0x7f26bd0f9e88] /usr/lib/x86_64-linux-gnu/libclang-cpp.so.11(+0xa2ab34)[0x7f26bd0aab34] /usr/lib/x86_64-linux-gnu/libclang-cpp.so.11(+0xa80d6e)[0x7f26bd100d6e] /usr/lib/x86_64-linux-gnu/libclang-cpp.so.11(+0xa2fa44)[0x7f26bd0afa44] /usr/lib/x86_64-linux-gnu/libclang-cpp.so.11(+0xa79e88)[0x7f26bd0f9e88] /usr/lib/x86_64-linux-gnu/libclang-cpp.so.11(+0xa2ab34)[0x7f26bd0aab34] /usr/lib/x86_64-linux-gnu/libclang-cpp.so.11(+0xa3f4dd)[0x7f26bd0bf4dd] /usr/lib/x86_64-linux-gnu/libclang-cpp.so.11(+0xa2adb4)[0x7f26bd0aadb4] /usr/lib/x86_64-linux-gnu/libclang-cpp.so.11(+0xa2aab6)[0x7f26bd0aaab6] /usr/lib/x86_64-linux-gnu/libclang-cpp.so.11(+0xa4b1ff)[0x7f26bd0cb1ff] /usr/lib/x86_64-linux-gnu/libclang-cpp.so.11(+0xa4b301)[0x7f26bd0cb301] /usr/lib/x86_64-linux-gnu/libclang-cpp.so.11(+0xa489ed)[0x7f26bd0c89ed] /usr/lib/x86_64-linux-gnu/libclang-cpp.so.11(+0xa480ce)[0x7f26bd0c80ce] /usr/lib/x86_64-linux-gnu/libclang-cpp.so.11(+0xa2ff6d)[0x7f26bd0aff6d] /usr/lib/x86_64-linux-gnu/libclang-cpp.so.11(+0xa72b57)[0x7f26bd0f2b57] /usr/lib/x86_64-linux-gnu/libclang-cpp.so.11(+0xa72252)[0x7f26bd0f2252] /usr/lib/x86_64-linux-gnu/libclang-cpp.so.11(+0xa2adb4)[0x7f26bd0aadb4] /usr/lib/x86_64-linux-gnu/libclang-cpp.so.11(+0xa30873)[0x7f26bd0b0873] /usr/lib/x86_64-linux-gnu/libclang-cpp.so.11(+0xa2fb9c)[0x7f26bd0afb9c] /usr/lib/x86_64-linux-gnu/libclang-cpp.so.11(+0xa72b57)[0x7f26bd0f2b57] /usr/lib/x86_64-linux-gnu/libclang-cpp.so.11(+0xa72252)[0x7f26bd0f2252] /usr/lib/x86_64-linux-gnu/libclang-cpp.so.11(+0xa2adb4)[0x7f26bd0aadb4] /usr/lib/x86_64-linux-gnu/libclang-cpp.so.11(+0xa2aab6)[0x7f26bd0aaab6] /usr/lib/x86_64-linux-gnu/libclang-cpp.so.11(+0xa4b1ff)[0x7f26bd0cb1ff] /usr/lib/x86_64-linux-gnu/libclang-cpp.so.11(+0xa4b301)[0x7f26bd0cb301] /usr/lib/x86_64-linux-gnu/libclang-cpp.so.11(+0xa489ed)[0x7f26bd0c89ed] /usr/lib/x86_64-linux-gnu/libclang-cpp.so.11(+0xa480ce)[0x7f26bd0c80ce] /usr/lib/x86_64-linux-gnu/libclang-cpp.so.11(+0xa2ff6d)[0x7f26bd0aff6d] /usr/lib/x86_64-linux-gnu/libclang-cpp.so.11(+0xa8c467)[0x7f26bd10c467] /usr/lib/x86_64-linux-gnu/libclang-cpp.so.11(+0xa8a276)[0x7f26bd10a276] /usr/lib/x86_64-linux-gnu/libclang-cpp.so.11(+0xa2b67f)[0x7f26bd0ab67f] /usr/lib/x86_64-linux-gnu/libclang-cpp.so.11(+0xa48932)[0x7f26bd0c8932] /usr/lib/x86_64-linux-gnu/libclang-cpp.so.11(+0xa480ce)[0x7f26bd0c80ce] /usr/lib/x86_64-linux-gnu/libclang-cpp.so.11(+0xa2ff6d)[0x7f26bd0aff6d] /usr/lib/x86_64-linux-gnu/libclang-cpp.so.11(+0xa81dc0)[0x7f26bd101dc0] /usr/lib/x86_64-linux-gnu/libclang-cpp.so.11(+0xa2ab34)[0x7f26bd0aab34] /usr/lib/x86_64-linux-gnu/libclang-cpp.so.11(_ZNK5clang4Expr21EvaluateAsInitializerERNS_7APValueERKNS_10ASTContextEPKNS_7VarDeclERN4llvm15SmallVectorImplISt4pairINS_14SourceLocationENS_17PartialDiagnosticEEEE+0x426)[0x7f26bd0abe86] /usr/lib/x86_64-linux-gnu/libclang-cpp.so.11(_ZNK5clang7VarDecl13evaluateValueERN4llvm15SmallVectorImplISt4pairINS_14SourceLocationENS_17PartialDiagnosticEEEE+0xa0)[0x7f26bd02b5a0] /usr/lib/x86_64-linux-gnu/libclang-cpp.so.11(_ZN5clang4Sema32CheckCompleteVariableDeclarationEPNS_7VarDeclE+0xc07)[0x7f26bd579957] /usr/lib/x86_64-linux-gnu/libclang-cpp.so.11(_ZN5clang4Sema20AddInitializerToDeclEPNS_4DeclEPNS_4ExprEb+0x15ec)[0x7f26bd577e3c] /usr/lib/x86_64-linux-gnu/libclang-cpp.so.11(_ZN5clang6Parser44ParseDeclarationAfterDeclaratorAndAttributesERNS_10DeclaratorERKNS0_18ParsedTemplateInfoEPNS0_12ForRangeInitE+0x121f)[0x7f26bce89a7f] /usr/lib/x86_64-linux-gnu/libclang-cpp.so.11(_ZN5clang6Parser14ParseDeclGroupERNS_15ParsingDeclSpecENS_17DeclaratorContextEPNS_14SourceLocationEPNS0_12ForRangeInitE+0x84d)[0x7f26bce8736d] /usr/lib/x86_64-linux-gnu/libclang-cpp.so.11(_ZN5clang6Parser30ParseDeclOrFunctionDefInternalERNS0_25ParsedAttributesWithRangeERNS_15ParsingDeclSpecENS_15AccessSpecifierE+0x33d)[0x7f26bcf1d92d] /usr/lib/x86_64-linux-gnu/libclang-cpp.so.11(_ZN5clang6Parser36ParseDeclarationOrFunctionDefinitionERNS0_25ParsedAttributesWithRangeEPNS_15ParsingDeclSpecENS_15AccessSpecifierE+0x17c)[0x7f26bcf1d33c] /usr/lib/x86_64-linux-gnu/libclang-cpp.so.11(_ZN5clang6Parser24ParseExternalDeclarationERNS0_25ParsedAttributesWithRangeEPNS_15ParsingDeclSpecE+0xaac)[0x7f26bcf1c4bc] /usr/lib/x86_64-linux-gnu/libclang-cpp.so.11(_ZN5clang6Parser17ParseTopLevelDeclERNS_9OpaquePtrINS_12DeclGroupRefEEEb+0x51c)[0x7f26bcf1a7fc] /usr/lib/x86_64-linux-gnu/libclang-cpp.so.11(_ZN5clang8ParseASTERNS_4SemaEbb+0x1fd)[0x7f26bce72fcd] /usr/lib/x86_64-linux-gnu/libclang-cpp.so.11(_ZN5clang14FrontendAction7ExecuteEv+0x48)[0x7f26be37e818] /usr/lib/x86_64-linux-gnu/libclang-cpp.so.11(_ZN5clang16CompilerInstance13ExecuteActionERNS_14FrontendActionE+0x641)[0x7f26be336dd1] /usr/lib/x86_64-linux-gnu/libclang-cpp.so.11(_ZN5clang25ExecuteCompilerInvocationEPNS_16CompilerInstanceE+0x63f)[0x7f26be3e2c5f] /usr/bin/clang++(_Z8cc1_mainN4llvm8ArrayRefIPKcEES2_Pv+0x9b0)[0x412370] /usr/bin/clang++[0x410691] /usr/lib/x86_64-linux-gnu/libclang-cpp.so.11(+0x1a02e22)[0x7f26be082e22] /usr/lib/x86_64-linux-gnu/libLLVM-11.so.1(_ZN4llvm20CrashRecoveryContext9RunSafelyENS_12function_refIFvvEEE+0xd7)[0x7f26bf9ef687] /usr/lib/x86_64-linux-gnu/libclang-cpp.so.11(_ZNK5clang6driver10CC1Command7ExecuteEN4llvm8ArrayRefINS2_8OptionalINS2_9StringRefEEEEEPNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEPb+0x140)[0x7f26be082380] /usr/lib/x86_64-linux-gnu/libclang-cpp.so.11(ZNK5clang6driver11Compilation14ExecuteCommandERKNS0_7CommandERPS3+0x2df)[0x7f26be05aaaf] /usr/lib/x86_64-linux-gnu/libclang-cpp.so.11(_ZNK5clang6driver11Compilation11ExecuteJobsERKNS0_7JobListERN4llvm15SmallVectorImplISt4pairIiPKNS0_7CommandEEEE+0x76)[0x7f26be05ac56] /usr/lib/x86_64-linux-gnu/libclang-cpp.so.11(_ZN5clang6driver6Driver18ExecuteCompilationERNS0_11CompilationERN4llvm15SmallVectorImplISt4pairIiPKNS0_7CommandEEEE+0xdc)[0x7f26be06ddfc] /usr/bin/clang++(main+0x2430)[0x410010] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xe7)[0x7f26bb951b97] /usr/bin/clang++(_start+0x2a)[0x40d91a] clang: error: clang frontend command failed due to signal (use -v to see invocation) clang version 11.0.0-++20200222063817+e48849a2404-1exp120200222174409.1519 Target: x86_64-pc-linux-gnu Thread model: posix InstalledDir: /usr/bin clang: note: diagnostic msg: PLEASE submit a bug report to https://bugs.llvm.org/ and include the crash backtrace, preprocessed source, and associated run script. clang: note: diagnostic msg: ******************** PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT: Preprocessed source(s) and associated run script(s) are located at: clang: note: diagnostic msg: /tmp/thread_11-8ccc99.cpp clang: note: diagnostic msg: /tmp/thread_11-8ccc99.sh clang: note: diagnostic msg: ******************** ninja: build stopped: subcommand failed.
Shell script: (because I couldn't see how to make multiple attachments)
Crash reproducer for clang version 11.0.0-++20200222063817+e48849a2404-1exp120200222174409.1519
Driver args: "--driver-mode=g++" "-std=c++2a" "-fconstexpr-steps=2147483647" "-O3" "-std=gnu++2a" "-MD" "-MT" "CMakeFiles/cert.dir/src/threads/thread_0.cpp.o" "-MF" "CMakeFiles/cert.dir/src/threads/thread_0.cpp.o.d" "-o" "CMakeFiles/cert.dir/src/threads/thread_0.cpp.o" "-c" "/mnt/c/Users/cdgiessen/Documents/projects/cert/cert/src/threads/thread_0.cpp"
Original command: "/usr/lib/llvm-11/bin/clang" "-cc1" "-triple" "x86_64-pc-linux-gnu" "-emit-obj" "-disable-free" "-disable-llvm-verifier" "-discard-value-names" "-main-file-name" "thread_0.cpp" "-mrelocation-model" "static" "-mthread-model" "posix" "-mframe-pointer=none" "-fmath-errno" "-fdenormal-fp-math=ieee,ieee" "-fdenormal-fp-math-f32=ieee,ieee" "-fno-rounding-math" "-masm-verbose" "-mconstructor-aliases" "-munwind-tables" "-target-cpu" "x86-64" "-dwarf-column-info" "-fno-split-dwarf-inlining" "-debugger-tuning=gdb" "-resource-dir" "/usr/lib/llvm-11/lib/clang/11.0.0" "-dependency-file" "CMakeFiles/cert.dir/src/threads/thread_0.cpp.o.d" "-MT" "CMakeFiles/cert.dir/src/threads/thread_0.cpp.o" "-sys-header-deps" "-internal-isystem" "/usr/bin/../lib/gcc/x86_64-linux-gnu/7.4.0/../../../../include/c++/7.4.0" "-internal-isystem" "/usr/bin/../lib/gcc/x86_64-linux-gnu/7.4.0/../../../../include/x86_64-linux-gnu/c++/7.4.0" "-internal-isystem" "/usr/bin/../lib/gcc/x86_64-linux-gnu/7.4.0/../../../../include/x86_64-linux-gnu/c++/7.4.0" "-internal-isystem" "/usr/bin/../lib/gcc/x86_64-linux-gnu/7.4.0/../../../../include/c++/7.4.0/backward" "-internal-isystem" "/usr/local/include" "-internal-isystem" "/usr/lib/llvm-11/lib/clang/11.0.0/include" "-internal-externc-isystem" "/usr/include/x86_64-linux-gnu" "-internal-externc-isystem" "/include" "-internal-externc-isystem" "/usr/include" "-O3" "-std=gnu++2a" "-fdeprecated-macro" "-fdebug-compilation-dir" "/mnt/c/Users/cdgiessen/Documents/projects/cert/linux-build" "-fconstexpr-steps" "2147483647" "-ferror-limit" "19" "-fmessage-length" "0" "-fgnuc-version=4.2.1" "-fobjc-runtime=gcc" "-fcxx-exceptions" "-fexceptions" "-fdiagnostics-show-option" "-vectorize-loops" "-vectorize-slp" "-faddrsig" "-o" "CMakeFiles/cert.dir/src/threads/thread_0.cpp.o" "-x" "c++" "/mnt/c/Users/cdgiessen/Documents/projects/cert/cert/src/threads/thread_0.cpp"
"/usr/lib/llvm-11/bin/clang" "-cc1" "-triple" "x86_64-pc-linux-gnu" "-emit-obj" "-disable-free" "-disable-llvm-verifier" "-discard-value-names" "-main-file-name" "thread_0.cpp" "-mrelocation-model" "static" "-mthread-model" "posix" "-mframe-pointer=none" "-fmath-errno" "-fdenormal-fp-math=ieee,ieee" "-fdenormal-fp-math-f32=ieee,ieee" "-fno-rounding-math" "-masm-verbose" "-mconstructor-aliases" "-munwind-tables" "-target-cpu" "x86-64" "-dwarf-column-info" "-fno-split-dwarf-inlining" "-debugger-tuning=gdb" "-sys-header-deps" "-O3" "-std=gnu++2a" "-fdeprecated-macro" "-fconstexpr-steps" "2147483647" "-ferror-limit" "19" "-fmessage-length" "0" "-fgnuc-version=4.2.1" "-fobjc-runtime=gcc" "-fcxx-exceptions" "-fexceptions" "-fdiagnostics-show-option" "-vectorize-loops" "-vectorize-slp" "-faddrsig" "-x" "c++" "thread_0-0e75f1.cpp"