https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69756
Bug ID: 69756
Summary: Passing a multidimensional variable-length array into
a lambda (by reference) causes a segfault
Product: gcc
Version: 5.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: josutous at dodsi dot com
Target Milestone: ---
Version: gcc (GCC) 5.1.0,
Ubuntu 14.04 LTS (virtual machine)
gcc -v output:
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/local/libexec/gcc/x86_64-unknown-linux-gnu/5.1.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: ../gcc-5.1.0/configure --enable-cxx --enable-lto --enable-ssp
--with-isl=/usr/local --with-gmp=/usr/local --with-mpfr=/usr/local
--with-mpc=/usr/local --enable-ld=yes --enable-gold=yes --prefix=/usr/local
Thread model: posix
gcc version 5.1.0 (GCC)
command: g++ MWE.cpp -o mwe
Output:
MWE.cpp: In lambda function:
MWE.cpp:6:38: internal compiler error: in expand_expr_real_1, at expr.c:9608
int output = array[i4][i5][i6];
^
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
MWE.ii, generated by adding -save-temps to the command:
# 1 "MWE.cpp"
# 1 "<built-in>"
# 1 "<command-line>"
# 1 "/usr/include/stdc-predef.h" 1 3 4
# 1 "<command-line>" 2
# 1 "MWE.cpp"
int main() {
int i1 = 2, i2 = 3, i3 = 4;
int array[i1][i2][i3];
auto lambda = [&]() {
int i4 = 1, i5 = 2, i6 = 3;
int output = array[i4][i5][i6];
};
lambda();
}
Additional information:
Problem also occurs with two indices (int array [i1][i2]), but not with one
index (int array [i1]).
Tested on gcc.godbolt.org with GCC version 5.3.0, problem still occurs with
similar error message.
