OOM building Servo after Rustup - deep recursion in mir

[nrc]

#0  0x00007ffff7584da0 in oom::hc14cacb105af3859iub () from /usr/local/lib/libstd-8cf6ce90.so
#1  0x00007ffff64e9caf in raw_vec::_$LT$impl$GT$::double::double::h12412696929041978538 () from /usr/local/lib/librustc_mir-8cf6ce90.so
#2  0x00007ffff64e6260 in build::cfg::_$LT$impl$GT$::start_new_block::heb1b8380252b8530fna () from /usr/local/lib/librustc_mir-8cf6ce90.so
#3  0x00007ffff650b0e4 in build::matches::test::_$LT$impl$GT$::call_comparison_fn::h75cd7a8ef7591ed4HGb () from /usr/local/lib/librustc_mir-8cf6ce90.so
#4  0x00007ffff6509750 in build::matches::test::_$LT$impl$GT$::perform_test::h032a1e873b4f8bf31Ab () from /usr/local/lib/librustc_mir-8cf6ce90.so
#5  0x00007ffff6511b25 in build::matches::_$LT$impl$GT$::match_candidates::ha9db898a51f89f14tqc () from /usr/local/lib/librustc_mir-8cf6ce90.so
#6  0x00007ffff65120ee in build::matches::_$LT$impl$GT$::match_candidates::ha9db898a51f89f14tqc () from /usr/local/lib/librustc_mir-8cf6ce90.so
#7  0x00007ffff65120ee in build::matches::_$LT$impl$GT$::match_candidates::ha9db898a51f89f14tqc () from /usr/local/lib/librustc_mir-8cf6ce90.so
#8  0x00007ffff65120ee in build::matches::_$LT$impl$GT$::match_candidates::ha9db898a51f89f14tqc () from /usr/local/lib/librustc_mir-8cf6ce90.so
#9  0x00007ffff65120ee in build::matches::_$LT$impl$GT$::match_candidates::ha9db898a51f89f14tqc () from /usr/local/lib/librustc_mir-8cf6ce90.so
#10 0x00007ffff65120ee in build::matches::_$LT$impl$GT$::match_candidates::ha9db898a51f89f14tqc () from /usr/local/lib/librustc_mir-8cf6ce90.so
...
#120 0x00007ffff65120ee in build::matches::_$LT$impl$GT$::match_candidates::ha9db898a51f89f14tqc () from /usr/local/lib/librustc_mir-8cf6ce90.so
#121 0x00007ffff64febcc in build::expr::into::_$LT$impl$GT$::into_expr::hd474bc15d5db47d4w8a () from /usr/local/lib/librustc_mir-8cf6ce90.so
#122 0x00007ffff64ff70f in build::into::_$LT$impl$GT$::eval_into::h646bd1cee14f27349ob () from /usr/local/lib/librustc_mir-8cf6ce90.so
#123 0x00007ffff64fa3ca in build::expr::into::_$LT$impl$GT$::into_expr::hd474bc15d5db47d4w8a () from /usr/local/lib/librustc_mir-8cf6ce90.so
#124 0x00007ffff64ff70f in build::into::_$LT$impl$GT$::eval_into::h646bd1cee14f27349ob () from /usr/local/lib/librustc_mir-8cf6ce90.so
#125 0x00007ffff64e9c1e in build::into::_$LT$impl$GT$::eval_into::h653729f06b55769coqb () from /usr/local/lib/librustc_mir-8cf6ce90.so
#126 0x00007ffff64e81c8 in build::block::_$LT$impl$GT$::ast_block::h4dafd3792c8ce5263ka () from /usr/local/lib/librustc_mir-8cf6ce90.so
#127 0x00007ffff64e3b6e in build::construct::h9612d1f0ff18acc5Zba () from /usr/local/lib/librustc_mir-8cf6ce90.so
#128 0x00007ffff651ef95 in mir_map::_$LT$impl$GT$::visit_fn::h2e04acb1eab91708sbd () from /usr/local/lib/librustc_mir-8cf6ce90.so
#129 0x00007ffff651ced9 in mir_map::_$LT$impl$GT$::visit_item::ha51d31a4db6001c2s8c () from /usr/local/lib/librustc_mir-8cf6ce90.so
#130 0x00007ffff651ca8a in mir_map::_$LT$impl$GT$::visit_item::ha51d31a4db6001c2s8c () from /usr/local/lib/librustc_mir-8cf6ce90.so
#131 0x00007ffff651ca8a in mir_map::_$LT$impl$GT$::visit_item::ha51d31a4db6001c2s8c () from /usr/local/lib/librustc_mir-8cf6ce90.so
#132 0x00007ffff651c40c in mir_map::build_mir_for_crate::h410e26a41a34d6ccA6c () from /usr/local/lib/librustc_mir-8cf6ce90.so
#133 0x00007ffff7a49440 in driver::phase_3_run_analysis_passes::_$LT$closure$GT$::closure.21972 () from /usr/local/lib/librustc_driver-8cf6ce90.so
#134 0x00007ffff7a2c464 in middle::ty::context::_$LT$impl$GT$::create_and_enter::create_and_enter::h4307381944410836454 () from /usr/local/lib/librustc_driver-8cf6ce90.so
#135 0x00007ffff7a27855 in driver::phase_3_run_analysis_passes::h6779606147744044053 () from /usr/local/lib/librustc_driver-8cf6ce90.so
#136 0x00007ffff7a07ba3 in driver::compile_input::h773898ad93c34082aca () from /usr/local/lib/librustc_driver-8cf6ce90.so
#137 0x00007ffff7b63a3c in run_compiler::h89eb6260e132f685ssc () from /usr/local/lib/librustc_driver-8cf6ce90.so
#138 0x00007ffff7b60ab7 in sys_common::unwind::try::try_fn::try_fn::h9774174355030096594 () from /usr/local/lib/librustc_driver-8cf6ce90.so
#139 0x00007ffff756e339 in __rust_try () from /usr/local/lib/libstd-8cf6ce90.so
#140 0x00007ffff75623bc in sys_common::unwind::try::inner_try::h937939714e6f6031tus () from /usr/local/lib/libstd-8cf6ce90.so
#141 0x00007ffff7b60e05 in boxed::_$LT$impl$GT$::call_box::call_box::h2378443920150659394 () from /usr/local/lib/librustc_driver-8cf6ce90.so
#142 0x00007ffff75759f4 in sys::thread::_$LT$impl$GT$::new::thread_start::ha23768bb722fd035QUw () from /usr/local/lib/libstd-8cf6ce90.so
#143 0x00007ffff0c016aa in start_thread (arg=0x7fffeebff700) at pthread_create.c:333
#144 0x00007ffff71f6eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

The elided frames are all identical to the ones before and after.

Seems related, but different, to #29466

To repro, need to build Servo after a rustup, see this branch: servo/servo#8446. Occurs when building the script crate.

cc @nikomatsakis, @Manishearth

[nikomatsakis]

This is probably a dup of #29227. I'd be curious to know if it still occurs, as a partial fix has recently landed. I'm working on a more thorough fix now.

[Manishearth]

I'll check it out in tomorrow's nightly.

[nikomatsakis]

Minimized test case: https://gist.github.com/nikomatsakis/4cde4e099a20484efd15

[nikomatsakis]

triage: P-high (servo blocker)