https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79416
Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P2 |P3
CC| |jason at gcc dot gnu.org
Summary|[5/6/7 Regression] Internal |Internal compiler error for
|compiler error for |recursive template
|recursive template |expansion
|expansion |
--- Comment #3 from Jason Merrill <jason at gcc dot gnu.org> ---
This is about running out of stack, instantiating a ridiculous number of
functions that call each other. The error Martin sees in comment 1 is because
the old default instantiation limit of 500 was lower than the 800
instantiations the testcase wants to make of the 'nops' functions; since the
limit was raised to 900, we succeed in instantiating them, but then crash
running out of stack during ggc_collect. Comment 2 demonstrates that we can
get the same crash on older GCC by lowering the number of instantiations the
testcase requires, so this really isn't a regression.
A simple fix for the crash would be to raise the stack limit; doubling the
amount requested in the call to stack_limit_increase from toplev::main (from
64MB to 128MB) allows the testcase to proceed.
A difficult fix for the crash would be to reduce the stack consumption of the
GGC machinery.
