https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86740
Bug ID: 86740
Summary: ICE with hana and nested lambdas (tsubst_copy, at
cp/pt.c:15325)
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: markus at dreseler dot de
Target Milestone: ---
Created attachment 44467
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44467&action=edit
Test case
The attached file causes the following ICE:
gccice.cpp:35:26: internal compiler error: in tsubst_copy, at cp/pt.c:15325
std::cout << params << std::endl;
^~~~~~
0x599570 tsubst_copy
../../src/gcc/cp/pt.c:15325
0x6ce257 tsubst_copy
../../src/gcc/cp/pt.c:15301
0x6ce257 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
../../src/gcc/cp/pt.c:18843
0x6cf567 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
../../src/gcc/cp/pt.c:17782
0x6cf640 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
../../src/gcc/cp/pt.c:18630
0x6c1641 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
../../src/gcc/cp/pt.c:17412
0x6c4a04 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
../../src/gcc/cp/pt.c:16584
0x6c4a04 tsubst_decl
../../src/gcc/cp/pt.c:13723
0x6bcdf7 tsubst_copy
../../src/gcc/cp/pt.c:15431
0x6ce257 tsubst_copy
../../src/gcc/cp/pt.c:15301
0x6ce257 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
../../src/gcc/cp/pt.c:18843
0x6cf567 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
../../src/gcc/cp/pt.c:17782
0x6d0c69 tsubst_lambda_expr(tree_node*, tree_node*, int, tree_node*)
../../src/gcc/cp/pt.c:17553
0x6ce2df tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
../../src/gcc/cp/pt.c:18923
0x6ce8f6 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
../../src/gcc/cp/pt.c:18248
0x6c1641 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
../../src/gcc/cp/pt.c:17412
0x6c1425 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
../../src/gcc/cp/pt.c:16613
0x6c0cc8 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
../../src/gcc/cp/pt.c:16599
0x6c0bab tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
../../src/gcc/cp/pt.c:16896
0x6c1ffb tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
../../src/gcc/cp/pt.c:16866
I tried to cut the test case down as much as possible, but even seemingly
unrelated changes make the bug disappear. For example, try replacing YESSIR
with true.
First seen on g++-8 (Ubuntu 8.1.0-1ubuntu1) 8.1.0, but reproduced with svn
revision 263064. Command line is 'g++-8 -std=c++17 gccice.cpp'. Clang compiles
the file.
There is https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67411, which looks
somewhat similar, but the bug described there is already fixed.
