https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99336
Bug ID: 99336
Summary: [modules] ICE combining unordered_map, memory, module
partitions
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: practicaldesignbook at gmail dot com
Target Milestone: ---
Created attachment 50282
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=50282&action=edit
Input files A.cpp and Test.cpp with preprocessed source to trigger bug.
version: gcc version 11.0.1 20210301 (experimental)
target: x86_64-pc-linux-gnu
build options: -disable-multilib --enable-languages=c,c++,fortran,lto,objc
--no-create --no-recursion
g++ produces an internal compiler error when combining an unordered_map with a
module partition, but only if the <memory> header is also included. My original
code used a std::unique_ptr, but in reducing the bug to the minimal amount of
code, I discovered that usage of std::unique_ptr is not required to trigger the
bug. The bug is triggered by the inclusion of the <memory> header. Note, the
code compiles correctly if the memory header is not included.
g++ -fmodules-ts -std=c++20 -c A.cpp Test.cpp
Test.cpp:1:8: internal compiler error: in tree_node, at cp/module.cc:9157
1 | export module Test;
| ^~~~~~
0x69cde0 trees_out::tree_node(tree_node*)
../.././gcc/cp/module.cc:9157
0xa178c9 trees_out::core_vals(tree_node*)
../.././gcc/cp/module.cc:6027
0xa1aca4 trees_out::tree_node_vals(tree_node*)
../.././gcc/cp/module.cc:7168
0xa1aca4 trees_out::tree_value(tree_node*)
../.././gcc/cp/module.cc:8988
0xa16d64 trees_out::tree_node(tree_node*)
../.././gcc/cp/module.cc:9186
0xa178c9 trees_out::core_vals(tree_node*)
../.././gcc/cp/module.cc:6027
0xa1aca4 trees_out::tree_node_vals(tree_node*)
../.././gcc/cp/module.cc:7168
0xa1aca4 trees_out::tree_value(tree_node*)
../.././gcc/cp/module.cc:8988
0xa16d64 trees_out::tree_node(tree_node*)
../.././gcc/cp/module.cc:9186
0xa178c9 trees_out::core_vals(tree_node*)
../.././gcc/cp/module.cc:6027
0xa1aca4 trees_out::tree_node_vals(tree_node*)
../.././gcc/cp/module.cc:7168
0xa1aca4 trees_out::tree_value(tree_node*)
../.././gcc/cp/module.cc:8988
0xa16d64 trees_out::tree_node(tree_node*)
../.././gcc/cp/module.cc:9186
0xa178c9 trees_out::core_vals(tree_node*)
../.././gcc/cp/module.cc:6027
0xa1aca4 trees_out::tree_node_vals(tree_node*)
../.././gcc/cp/module.cc:7168
0xa1aca4 trees_out::tree_value(tree_node*)
../.././gcc/cp/module.cc:8988
0xa16d64 trees_out::tree_node(tree_node*)
../.././gcc/cp/module.cc:9186
0xa178c9 trees_out::core_vals(tree_node*)
../.././gcc/cp/module.cc:6027
0xa1aca4 trees_out::tree_node_vals(tree_node*)
../.././gcc/cp/module.cc:7168
0xa1aca4 trees_out::tree_value(tree_node*)
../.././gcc/cp/module.cc:8988
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
