https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80856
Bug ID: 80856
Summary: ICE from template local overload resolution
Product: gcc
Version: 7.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: joshkel at gmail dot com
Target Milestone: ---
Created attachment 41402
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41402&action=edit
Test case
Compiling the attached source file with no flags ("g++-7
EngineReportWriter.cpp") results in an internal compiler error:
EngineReportWriter.cpp: In function ‘T WrapToCycle(T) [with T = int]’:
EngineReportWriter.cpp:2:10: internal compiler error: Segmentation fault
inline T WrapToCycle(T degrees)
^~~~~~~~~~~
0x86f4b4a crash_signal
../../src/gcc/toplev.c:337
0x84d576b useless_type_conversion_p(tree_node*, tree_node*)
../../src/gcc/gimple-expr.c:85
0x83b4b8f types_compatible_p
../../src/gcc/gimple-expr.h:66
0x83b4b8f gimple_check_call_args
../../src/gcc/cgraph.c:3733
0x83b4b8f gimple_check_call_matching_types(gimple*, tree_node*, bool)
../../src/gcc/cgraph.c:3783
0x83b6304 symbol_table::create_edge(cgraph_node*, cgraph_node*, gcall*, long
long, int, bool)
../../src/gcc/cgraph.c:864
0x83b6529 cgraph_node::create_edge(cgraph_node*, gcall*, long long, int)
../../src/gcc/cgraph.c:900
0x83bbb06 execute
../../src/gcc/cgraphbuild.c:337
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <file:///usr/share/doc/gcc-7/README.Bugs> for instructions.
The bug appears to be triggered by the combination of a template plus local
function declarations plus overload resolution. If I move the local scope
function declarations to global scope, or if I change the function declarations
so that overload resolution isn't necessary, then the bug goes away.
This is on Ubuntu 14.04 x86, running GCC 7.1.0 from the Ubuntu Toolchain Test
PPA (https://launchpad.net/~ubuntu-toolchain-r/+archive/ubuntu/test).
Previous versions of GCC (including GCC 6.3.0 from the Ubuntu Toolchain Test
PPA) are unaffected.
GCC 7.1 on godbolt.org is also reporting errors: https://godbolt.org/g/eAYhqd
