$ cat crash.cpp void crash_me(unsigned short sz) { if (sz == 0) return; short iov[sz]; auto fce = [&iv = iov](short value) { iv[0] = 0; }; fce(1); } $ /usr/lib/gcc-snapshot/bin/g++ -c crash.cpp crash.cpp: In lambda function: crash.cpp:6:37: internal compiler error: Segmentation fault 6 | auto fce = [&iv = iov](short value) { iv[0] = 0; }; | ^ Please submit a full bug report, with preprocessed source if appropriate. Program received signal SIGSEGV, Segmentation fault. 0x00000000009273a0 in insert_capture_proxy(tree_node*) () (gdb) bt #0 0x00000000009273a0 in insert_capture_proxy(tree_node*) () #1 0x0000000000927e1e in ?? () #2 0x000000000092b0d8 in start_lambda_function(tree_node*, tree_node*) () #3 0x0000000000976a73 in ?? () #4 0x000000000097b1c3 in ?? () #5 0x000000000098887b in ?? () #6 0x0000000000965400 in ?? () #7 0x0000000000965bda in ?? () #8 0x0000000000966aa8 in ?? () #9 0x000000000096648e in ?? () #10 0x0000000000966a42 in ?? () #11 0x000000000096a870 in ?? () #12 0x000000000098eaca in ?? () #13 0x0000000000972953 in ?? () #14 0x000000000097449a in ?? () #15 0x0000000000974f2c in ?? () #16 0x0000000000975f09 in ?? () #17 0x0000000000975fe9 in ?? () #18 0x000000000098d7b6 in ?? () #19 0x000000000098e06c in ?? () #20 0x000000000098edca in ?? () #21 0x0000000000972953 in ?? () #22 0x0000000000995641 in ?? () #23 0x0000000000995dbd in c_parse_file() () #24 0x0000000000a980ec in c_common_parse_file() () #25 0x0000000000f21440 in ?? () #26 0x0000000000864568 in toplev::main(int, char**) () #27 0x0000000000867bef in main ()
Started with r253265.
Related to e.g. PR89138 - lambdas and VLAs don't play nicely together right now.
Author: jason Date: Fri Feb 22 02:47:33 2019 New Revision: 269094 URL: https://gcc.gnu.org/viewcvs?rev=269094&root=gcc&view=rev Log: PR c++/88394 - ICE with VLA init-capture. We mostly use is_normal_capture_proxy to decide whether or not to use DECL_CAPTURED_VARIABLE; we could just check whether it's set. VLA capture is still mostly broken, but this fixes this ICE. * lambda.c (is_normal_capture_proxy): Check DECL_CAPTURED_VARIABLE. Added: trunk/gcc/testsuite/g++.dg/cpp1y/lambda-init-vla1.C Modified: trunk/gcc/cp/ChangeLog trunk/gcc/cp/lambda.c
Fixed on trunk so far.
GCC 8.3 has been released.
The releases/gcc-8 branch has been updated by Jason Merrill <jason@gcc.gnu.org>: https://gcc.gnu.org/g:bf2fe5d49627ca757123f4425a029bd92c50fc05 commit r8-10068-gbf2fe5d49627ca757123f4425a029bd92c50fc05 Author: Jason Merrill <jason@redhat.com> Date: Tue Feb 25 21:29:03 2020 -0500 PR c++/88394 - ICE with VLA init-capture. We mostly use is_normal_capture_proxy to decide whether or not to use DECL_CAPTURED_VARIABLE; we could just check whether it's set. VLA capture is still mostly broken, but this fixes this ICE. gcc/cp/ChangeLog 2020-02-25 Jason Merrill <jason@redhat.com> PR c++/88394 - ICE with VLA init-capture. * lambda.c (is_normal_capture_proxy): Check DECL_CAPTURED_VARIABLE.
Fixed for 8.4.