https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120911
--- Comment #1 from Jiangchang <jiangchangwu at smail dot nju.edu.cn> --- Compiler Explorer: https://gcc.godbolt.org/z/WdoEqM8sc ******************************************************************************* gcc version: Using built-in specs. COLLECT_GCC=gcc-trunk COLLECT_LTO_WRAPPER=/home/software/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/16.0.0/lto-wrapper Target: x86_64-pc-linux-gnu Configured with: ../gcc/configure --disable-multilib --disable-bootstrap --enable-languages=c,c++ --prefix=/home/software/gcc-trunk --enable-coverage --disable-werror --enable-checking=yes Thread model: posix Supported LTO compression algorithms: zlib gcc version 16.0.0 20250613 (experimental) (GCC) ******************************************************************************* Program: $ cat mutant.c int a = 1; extern int a __attribute__((weakref(""))); ******************************************************************************* Command Lines: $ gcc mutant.c mutant.c:1:5: error: 'weakref' symbol 'a' must have static linkage 1 | int a = 1; | ^ mutant.c:1:5: warning: 'weakref' attribute ignored because variable is initialized [-Wattributes] cc1: internal compiler error: in get, at cgraph.h:2829 0x5554b38 internal_error(char const*, ...) ../../gcc/gcc/diagnostic-global-context.cc:517 0x54d2d0a fancy_abort(char const*, int, char const*) ../../gcc/gcc/diagnostic.cc:1803 0x1589f3c varpool_node::get(tree_node const*) ../../gcc/gcc/cgraph.h:2829 0x2a8dbac varpool_node::analyze() ../../gcc/gcc/varpool.cc:535 0x142ec20 analyze_functions ../../gcc/gcc/cgraphunit.cc:1319 0x1434c51 symbol_table::finalize_compilation_unit() ../../gcc/gcc/cgraphunit.cc:2574 Please submit a full bug report, with preprocessed source (by using -freport-bug). Please include the complete backtrace with any bug report. See <https://gcc.gnu.org/bugs/> for instructions.
