Allow up to 128MB stack size for build.rs

[nox]

No description provided.

[emilio]

Add a comment?

[nox]

@bors-servo r=emilio

[bors-servo]

📌 Commit 0ce2dae has been approved by emilio

[bors-servo]

⌛ Testing commit 0ce2dae with merge 0716de2...

[bors-servo]

☀️ Test successful - status-travis
Approved by: emilio
Pushing 0716de2 to master...

[Ygg01]

@nox What's causing Builder to take so much space?

[nox]

What do you mean?

…

-- Anthony Ramine

Le 26 avr. 2018 à 15:50, Ygg01 ***@***.***> a écrit : @nox What's causing Builder to take so much space? — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub, or mute the thread.

[Ygg01]

@nox To clarify - in comment it says it's we have Stack Overflow on Servo CI. I inferred that since you are limiting the Builder that's what's causing the stack overflow, and wondering in what cases does it overflow?

[nox]

I don't understand what you mean by Builder, given I added the thread builder to avoid a stack overflow. We don't know why that stack overflow occurs but it's probably the new syn version using more memory or something like that.

[Ygg01]

Mea culpa, I thought I saw Builder in old code. Anyway thanks for the response.

[nox]

You're welcome!

[SimonSapin]

I played a bit with different stack sizes on Linux x64. In debug mode, the build script fails when I take it under ~550 KB. The default stack size of macOS is apparently 512 KB. Release mode helps, I assume with inlining. The limit then is around ~130 KB.

Debug mode stack in gdb below. It looks like there is no infinite recursion bug, it’s just that syn’s parser is very recursive and we pass it deeply nested data. 257 stack frames total, 183 from syn::parse2.

#0  0x000055555587d014 in core::cell::BorrowRef::new ()
#1  0x000055555587b89b in <core::cell::RefCell<T>>::try_borrow ()
#2  0x000055555587bbfb in <core::cell::RefCell<T>>::borrow ()
#3  0x0000555555884991 in proc_macro2::imp::Term::as_str::{{closure}} ()
#4  0x0000555555892999 in <std::thread::local::LocalKey<T>>::try_with ()
#5  0x0000555555892318 in <std::thread::local::LocalKey<T>>::with ()
#6  0x0000555555884964 in proc_macro2::imp::Term::as_str ()
#7  0x000055555586c269 in proc_macro2::Term::as_str ()
#8  0x0000555555779d59 in syn::ident::parsing::<impl syn::synom::Synom for syn::ident::Ident>::parse ()
#9  0x0000555555787247 in syn::path::parsing::<impl syn::synom::Synom for syn::path::PathSegment>::parse ()
#10 0x0000555555856b86 in <syn::punctuated::Punctuated<T, P>>::parse ()
#11 0x000055555584ae47 in <syn::punctuated::Punctuated<T, P>>::parse_separated_nonempty_with ()
#12 0x000055555584aaa4 in <syn::punctuated::Punctuated<T, P>>::parse_separated_nonempty ()
#13 0x0000555555784dbc in syn::path::parsing::<impl syn::synom::Synom for syn::path::Path>::parse ()
#14 0x000055555571ea9a in syn::expr::parsing::<impl syn::synom::Synom for syn::expr::ExprStruct>::parse ()
#15 0x00005555557f24b5 in syn::expr::parsing::atom_expr ()
#16 0x00005555557ef31d in syn::expr::parsing::trailer_expr ()
#17 0x00005555557eeba8 in syn::expr::parsing::unary_expr ()
#18 0x00005555557eb55d in syn::expr::parsing::cast_expr ()
#19 0x00005555557e9b92 in syn::expr::parsing::term_expr ()
#20 0x00005555557e8322 in syn::expr::parsing::arith_expr ()
#21 0x00005555557e6ab2 in syn::expr::parsing::shift_expr ()
#22 0x00005555557e4e52 in syn::expr::parsing::bitand_expr ()
#23 0x00005555557e346a in syn::expr::parsing::bitxor_expr ()
#24 0x00005555557e1802 in syn::expr::parsing::bitor_expr ()
#25 0x00005555557df5fa in syn::expr::parsing::compare_expr ()
#26 0x00005555557dde32 in syn::expr::parsing::and_expr ()
#27 0x00005555557dc682 in syn::expr::parsing::or_expr ()
#28 0x00005555557dadf2 in syn::expr::parsing::range_expr ()
#29 0x00005555557d9cc2 in syn::expr::parsing::placement_expr ()
#30 0x00005555557d819a in syn::expr::parsing::assign_expr ()
#31 0x00005555557d8091 in syn::expr::parsing::ambiguous_expr ()
#32 0x000055555571114f in syn::expr::parsing::<impl syn::synom::Synom for syn::expr::Expr>::parse ()
#33 0x000055555584d4e6 in <syn::punctuated::Punctuated<T, P>>::parse ()
#34 0x000055555584b2e3 in <syn::punctuated::Punctuated<T, P>>::parse_terminated_with ()
#35 0x000055555584ab04 in <syn::punctuated::Punctuated<T, P>>::parse_terminated ()
#36 0x00005555557f7e5d in syn::expr::parsing::and_call::{{closure}} ()
#37 0x00005555557a2e50 in syn::token::parsing::delim ()
#38 0x0000555555768984 in syn::token::Paren::parse ()
#39 0x00005555557f7e3d in syn::expr::parsing::and_call ()
#40 0x00005555557ef775 in syn::expr::parsing::trailer_expr ()
#41 0x00005555557eeba8 in syn::expr::parsing::unary_expr ()
#42 0x00005555557eb55d in syn::expr::parsing::cast_expr ()
#43 0x00005555557e9b92 in syn::expr::parsing::term_expr ()
#44 0x00005555557e8322 in syn::expr::parsing::arith_expr ()
#45 0x00005555557e6ab2 in syn::expr::parsing::shift_expr ()
#46 0x00005555557e4e52 in syn::expr::parsing::bitand_expr ()
#47 0x00005555557e346a in syn::expr::parsing::bitxor_expr ()
#48 0x00005555557e1802 in syn::expr::parsing::bitor_expr ()
#49 0x00005555557df5fa in syn::expr::parsing::compare_expr ()
#50 0x00005555557dde32 in syn::expr::parsing::and_expr ()
#51 0x00005555557dc682 in syn::expr::parsing::or_expr ()
#52 0x00005555557dadf2 in syn::expr::parsing::range_expr ()
#53 0x00005555557d9cc2 in syn::expr::parsing::placement_expr ()
#54 0x00005555557d819a in syn::expr::parsing::assign_expr ()
#55 0x00005555557d8091 in syn::expr::parsing::ambiguous_expr ()
#56 0x000055555571114f in syn::expr::parsing::<impl syn::synom::Synom for syn::expr::Expr>::parse ()
#57 0x0000555555719fb7 in syn::expr::parsing::<impl syn::synom::Synom for syn::expr::Arm>::parse ()
#58 0x0000555555778172 in syn::parsers::many0 ()
#59 0x00005555557fa634 in syn::expr::parsing::<impl syn::synom::Synom for syn::expr::ExprMatch>::parse::{{closure}} ()
#60 0x00005555557a96f0 in syn::token::parsing::delim ()
#61 0x0000555555767764 in syn::token::Brace::parse ()
#62 0x0000555555717644 in syn::expr::parsing::<impl syn::synom::Synom for syn::expr::ExprMatch>::parse ()
#63 0x00005555557f6859 in syn::expr::parsing::expr_nosemi ()
#64 0x000055555580617f in syn::expr::parsing::stmt_blockexpr ()
#65 0x000055555572561b in syn::expr::parsing::<impl syn::synom::Synom for syn::expr::Stmt>::parse ()
#66 0x0000555555722f0b in syn::expr::parsing::<impl syn::expr::Block>::parse_within ()
#67 0x000055555580239d in syn::expr::parsing::<impl syn::synom::Synom for syn::expr::Block>::parse::{{closure}} ()
#68 0x000055555579aa80 in syn::token::parsing::delim ()
#69 0x0000555555767624 in syn::token::Brace::parse ()
#70 0x0000555555722461 in syn::expr::parsing::<impl syn::synom::Synom for syn::expr::Block>::parse ()
#71 0x00005555557217f1 in syn::expr::parsing::<impl syn::synom::Synom for syn::expr::ExprBlock>::parse ()
#72 0x00005555557f4750 in syn::expr::parsing::atom_expr ()
#73 0x00005555557ef31d in syn::expr::parsing::trailer_expr ()
#74 0x00005555557eeba8 in syn::expr::parsing::unary_expr ()
#75 0x00005555557eb55d in syn::expr::parsing::cast_expr ()
#76 0x00005555557e9b92 in syn::expr::parsing::term_expr ()
#77 0x00005555557e8322 in syn::expr::parsing::arith_expr ()
#78 0x00005555557e6ab2 in syn::expr::parsing::shift_expr ()
#79 0x00005555557e4e52 in syn::expr::parsing::bitand_expr ()
#80 0x00005555557e346a in syn::expr::parsing::bitxor_expr ()
#81 0x00005555557e1802 in syn::expr::parsing::bitor_expr ()
#82 0x00005555557df5fa in syn::expr::parsing::compare_expr ()
#83 0x00005555557dde32 in syn::expr::parsing::and_expr ()
#84 0x00005555557dc682 in syn::expr::parsing::or_expr ()
#85 0x00005555557dadf2 in syn::expr::parsing::range_expr ()
#86 0x00005555557d9cc2 in syn::expr::parsing::placement_expr ()
#87 0x00005555557d819a in syn::expr::parsing::assign_expr ()
#88 0x00005555557d8091 in syn::expr::parsing::ambiguous_expr ()
#89 0x00005555557fbac4 in syn::expr::parsing::expr_closure ()
#90 0x00005555557f44bc in syn::expr::parsing::atom_expr ()
#91 0x00005555557ef31d in syn::expr::parsing::trailer_expr ()
#92 0x00005555557eeba8 in syn::expr::parsing::unary_expr ()
#93 0x00005555557eb55d in syn::expr::parsing::cast_expr ()
#94 0x00005555557e9b92 in syn::expr::parsing::term_expr ()
#95 0x00005555557e8322 in syn::expr::parsing::arith_expr ()
#96 0x00005555557e6ab2 in syn::expr::parsing::shift_expr ()
#97 0x00005555557e4e52 in syn::expr::parsing::bitand_expr ()
#98 0x00005555557e346a in syn::expr::parsing::bitxor_expr ()
#99 0x00005555557e1802 in syn::expr::parsing::bitor_expr ()
#100 0x00005555557df5fa in syn::expr::parsing::compare_expr ()
#101 0x00005555557dde32 in syn::expr::parsing::and_expr ()
#102 0x00005555557dc682 in syn::expr::parsing::or_expr ()
#103 0x00005555557dadf2 in syn::expr::parsing::range_expr ()
#104 0x00005555557d9cc2 in syn::expr::parsing::placement_expr ()
#105 0x00005555557d819a in syn::expr::parsing::assign_expr ()
#106 0x00005555557d8091 in syn::expr::parsing::ambiguous_expr ()
#107 0x000055555571114f in syn::expr::parsing::<impl syn::synom::Synom for syn::expr::Expr>::parse ()
#108 0x000055555584d4e6 in <syn::punctuated::Punctuated<T, P>>::parse ()
#109 0x000055555584b2e3 in <syn::punctuated::Punctuated<T, P>>::parse_terminated_with ()
#110 0x000055555584ab04 in <syn::punctuated::Punctuated<T, P>>::parse_terminated ()
#111 0x00005555557f956d in syn::expr::parsing::and_method_call::{{closure}} ()
#112 0x000055555579cb50 in syn::token::parsing::delim ()
#113 0x00005555557685c4 in syn::token::Paren::parse ()
#114 0x00005555557f8a4d in syn::expr::parsing::and_method_call ()
#115 0x00005555557efc5d in syn::expr::parsing::trailer_expr ()
#116 0x00005555557eeba8 in syn::expr::parsing::unary_expr ()
#117 0x00005555557eb55d in syn::expr::parsing::cast_expr ()
#118 0x00005555557e9b92 in syn::expr::parsing::term_expr ()
#119 0x00005555557e8322 in syn::expr::parsing::arith_expr ()
#120 0x00005555557e6ab2 in syn::expr::parsing::shift_expr ()
#121 0x00005555557e4e52 in syn::expr::parsing::bitand_expr ()
#122 0x00005555557e346a in syn::expr::parsing::bitxor_expr ()
#123 0x00005555557e1802 in syn::expr::parsing::bitor_expr ()
#124 0x00005555557df5fa in syn::expr::parsing::compare_expr ()
#125 0x00005555557dde32 in syn::expr::parsing::and_expr ()
#126 0x00005555557dc682 in syn::expr::parsing::or_expr ()
#127 0x00005555557dadf2 in syn::expr::parsing::range_expr ()
#128 0x00005555557d9cc2 in syn::expr::parsing::placement_expr ()
#129 0x00005555557d819a in syn::expr::parsing::assign_expr ()
#130 0x00005555557d8091 in syn::expr::parsing::ambiguous_expr ()
#131 0x000055555571114f in syn::expr::parsing::<impl syn::synom::Synom for syn::expr::Expr>::parse ()
#132 0x0000555555804444 in syn::expr::parsing::stmt_local ()
#133 0x000055555572543f in syn::expr::parsing::<impl syn::synom::Synom for syn::expr::Stmt>::parse ()
#134 0x0000555555722f0b in syn::expr::parsing::<impl syn::expr::Block>::parse_within ()
#135 0x000055555580239d in syn::expr::parsing::<impl syn::synom::Synom for syn::expr::Block>::parse::{{closure}} ()
#136 0x000055555579aa80 in syn::token::parsing::delim ()
#137 0x0000555555767624 in syn::token::Brace::parse ()
#138 0x0000555555722461 in syn::expr::parsing::<impl syn::synom::Synom for syn::expr::Block>::parse ()
#139 0x00005555557217f1 in syn::expr::parsing::<impl syn::synom::Synom for syn::expr::ExprBlock>::parse ()
#140 0x00005555557f7011 in syn::expr::parsing::expr_nosemi ()
#141 0x0000555555719eb1 in syn::expr::parsing::<impl syn::synom::Synom for syn::expr::Arm>::parse ()
#142 0x0000555555778172 in syn::parsers::many0 ()
#143 0x00005555557fa634 in syn::expr::parsing::<impl syn::synom::Synom for syn::expr::ExprMatch>::parse::{{closure}}
    ()
#144 0x00005555557a96f0 in syn::token::parsing::delim ()
#145 0x0000555555767764 in syn::token::Brace::parse ()
#146 0x0000555555717644 in syn::expr::parsing::<impl syn::synom::Synom for syn::expr::ExprMatch>::parse ()
#147 0x00005555557f6859 in syn::expr::parsing::expr_nosemi ()
#148 0x000055555580617f in syn::expr::parsing::stmt_blockexpr ()
#149 0x000055555572561b in syn::expr::parsing::<impl syn::synom::Synom for syn::expr::Stmt>::parse ()
#150 0x0000555555722f0b in syn::expr::parsing::<impl syn::expr::Block>::parse_within ()
#151 0x000055555580239d in syn::expr::parsing::<impl syn::synom::Synom for syn::expr::Block>::parse::{{closure}} ()
#152 0x000055555579aa80 in syn::token::parsing::delim ()
#153 0x0000555555767624 in syn::token::Brace::parse ()
#154 0x0000555555722461 in syn::expr::parsing::<impl syn::synom::Synom for syn::expr::Block>::parse ()
#155 0x00005555557217f1 in syn::expr::parsing::<impl syn::synom::Synom for syn::expr::ExprBlock>::parse ()
#156 0x00005555557f7011 in syn::expr::parsing::expr_nosemi ()
#157 0x0000555555719eb1 in syn::expr::parsing::<impl syn::synom::Synom for syn::expr::Arm>::parse ()
#158 0x0000555555778172 in syn::parsers::many0 ()
#159 0x00005555557fa634 in syn::expr::parsing::<impl syn::synom::Synom for syn::expr::ExprMatch>::parse::{{closure}}
    ()
#160 0x00005555557a96f0 in syn::token::parsing::delim ()
#161 0x0000555555767764 in syn::token::Brace::parse ()
#162 0x0000555555717644 in syn::expr::parsing::<impl syn::synom::Synom for syn::expr::ExprMatch>::parse ()
#163 0x00005555557f3d4c in syn::expr::parsing::atom_expr ()
#164 0x00005555557ef31d in syn::expr::parsing::trailer_expr ()
#165 0x00005555557eeba8 in syn::expr::parsing::unary_expr ()
#166 0x00005555557eb55d in syn::expr::parsing::cast_expr ()
#167 0x00005555557e9b92 in syn::expr::parsing::term_expr ()
#168 0x00005555557e8322 in syn::expr::parsing::arith_expr ()
#169 0x00005555557e6ab2 in syn::expr::parsing::shift_expr ()
#170 0x00005555557e4e52 in syn::expr::parsing::bitand_expr ()
#171 0x00005555557e346a in syn::expr::parsing::bitxor_expr ()
#172 0x00005555557e1802 in syn::expr::parsing::bitor_expr ()
#173 0x00005555557df5fa in syn::expr::parsing::compare_expr ()
#174 0x00005555557dde32 in syn::expr::parsing::and_expr ()
#175 0x00005555557dc682 in syn::expr::parsing::or_expr ()
#176 0x00005555557dadf2 in syn::expr::parsing::range_expr ()
#177 0x00005555557d9cc2 in syn::expr::parsing::placement_expr ()
#178 0x00005555557d819a in syn::expr::parsing::assign_expr ()
#179 0x00005555557d8091 in syn::expr::parsing::ambiguous_expr ()
#180 0x000055555571114f in syn::expr::parsing::<impl syn::synom::Synom for syn::expr::Expr>::parse ()
#181 0x00005555555c9414 in core::ops::function::FnOnce::call_once ()
#182 0x00005555556b394f in <F as syn::synom::Parser>::parse2 ()
#183 0x0000555555681b0e in syn::parse2 ()
#184 0x0000555555674e75 in build_script_build::match_token::expand_match_token ()
#185 0x00005555556790fe in <build_script_build::match_token::MatchTokenParser as syn::gen::fold::Fold>::fold_expr ()
#186 0x00005555556a8b89 in syn::gen::fold::fold_arm ()
#187 0x0000555555643f2c in syn::gen::fold::Fold::fold_arm ()
#188 0x0000555555697192 in syn::gen::fold::fold_expr_match::{{closure}} ()
#189 0x00005555556b3280 in core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &'a mut F>::call_once
    ()
#190 0x00005555556678a4 in <core::option::Option<T>>::map ()
#191 0x000055555560e974 in <core::iter::Map<I, F> as core::iter::iterator::Iterator>::next ()
#192 0x000055555559fded in <alloc::vec::Vec<T> as alloc::vec::SpecExtend<T, I>>::spec_extend ()
#193 0x00005555555c147f in <alloc::vec::Vec<T> as alloc::vec::SpecExtend<T, I>>::from_iter ()
#194 0x00005555555c541a in <alloc::vec::Vec<T> as core::iter::traits::FromIterator<T>>::from_iter ()
#195 0x0000555555608c9a in core::iter::iterator::Iterator::collect ()
#196 0x0000555555597988 in <alloc::vec::Vec<T> as syn::gen::helper::fold::FoldHelper>::lift ()
#197 0x000055555569702b in syn::gen::fold::fold_expr_match ()
#198 0x0000555555641ecc in syn::gen::fold::Fold::fold_expr_match ()
#199 0x00005555556ab385 in syn::gen::fold::fold_expr ()
#200 0x000055555567900b in <build_script_build::match_token::MatchTokenParser as syn::gen::fold::Fold>::fold_expr ()
#201 0x00005555556af2fd in syn::gen::fold::fold_stmt ()
#202 0x0000555555678cfc in <build_script_build::match_token::MatchTokenParser as syn::gen::fold::Fold>::fold_stmt ()
#203 0x000055555568c237 in syn::gen::fold::fold_block::{{closure}} ()
#204 0x00005555556b0df0 in core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &'a mut F>::call_once
    ()
#205 0x00005555556653cf in <core::option::Option<T>>::map ()
#206 0x000055555560eb56 in <core::iter::Map<I, F> as core::iter::iterator::Iterator>::next ()
#207 0x00005555555abd88 in <alloc::vec::Vec<T> as alloc::vec::SpecExtend<T, I>>::spec_extend ()
#208 0x00005555555c1f1f in <alloc::vec::Vec<T> as alloc::vec::SpecExtend<T, I>>::from_iter ()
#209 0x00005555555c54fa in <alloc::vec::Vec<T> as core::iter::traits::FromIterator<T>>::from_iter ()
#210 0x0000555555608fba in core::iter::iterator::Iterator::collect ()
#211 0x0000555555596e48 in <alloc::vec::Vec<T> as syn::gen::helper::fold::FoldHelper>::lift ()
#212 0x000055555568c170 in syn::gen::fold::fold_block ()
#213 0x0000555555640b03 in syn::gen::fold::Fold::fold_block ()
#214 0x00005555556a5f09 in syn::gen::fold::fold_impl_item_method ()
#215 0x000055555564385f in syn::gen::fold::Fold::fold_impl_item_method ()
#216 0x0000555555693052 in syn::gen::fold::fold_impl_item ()
#217 0x00005555556417b1 in syn::gen::fold::Fold::fold_impl_item ()
#218 0x0000555555693fa7 in syn::gen::fold::fold_item_impl::{{closure}} ()
#219 0x00005555556b2aa0 in core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &'a mut F>::call_once
    ()
#220 0x0000555555654b4f in <core::option::Option<T>>::map ()
#221 0x000055555560e366 in <core::iter::Map<I, F> as core::iter::iterator::Iterator>::next ()
#222 0x00005555555b65a8 in <alloc::vec::Vec<T> as alloc::vec::SpecExtend<T, I>>::spec_extend ()
#223 0x00005555555c169f in <alloc::vec::Vec<T> as alloc::vec::SpecExtend<T, I>>::from_iter ()
#224 0x00005555555c5bfa in <alloc::vec::Vec<T> as core::iter::traits::FromIterator<T>>::from_iter ()
#225 0x0000555555609b9a in core::iter::iterator::Iterator::collect ()
#226 0x0000555555594d48 in <alloc::vec::Vec<T> as syn::gen::helper::fold::FoldHelper>::lift ()
#227 0x0000555555693cfe in syn::gen::fold::fold_item_impl ()
#228 0x0000555555641871 in syn::gen::fold::Fold::fold_item_impl ()
#229 0x00005555556ae2fa in syn::gen::fold::fold_item ()
#230 0x000055555564409f in syn::gen::fold::Fold::fold_item ()
#231 0x00005555556ad785 in syn::gen::fold::fold_file::{{closure}} ()
#232 0x00005555556b2470 in core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &'a mut F>::call_once
    ()
#233 0x000055555566087f in <core::option::Option<T>>::map ()
#234 0x000055555560fd07 in <core::iter::Map<I, F> as core::iter::iterator::Iterator>::next ()
#235 0x00005555555ba918 in <alloc::vec::Vec<T> as alloc::vec::SpecExtend<T, I>>::spec_extend ()
#236 0x00005555555bf9ef in <alloc::vec::Vec<T> as alloc::vec::SpecExtend<T, I>>::from_iter ()
#237 0x00005555555c3f8a in <alloc::vec::Vec<T> as core::iter::traits::FromIterator<T>>::from_iter ()
#238 0x0000555555609c3a in core::iter::iterator::Iterator::collect ()
#239 0x0000555555595ac8 in <alloc::vec::Vec<T> as syn::gen::helper::fold::FoldHelper>::lift ()
#240 0x00005555556ad5d9 in syn::gen::fold::fold_file ()
#241 0x000055555564403c in syn::gen::fold::Fold::fold_file ()
#242 0x0000555555674a4d in build_script_build::match_token::expand ()
#243 0x000055555560581a in build_script_build::main::{{closure}} ()
#244 0x0000555555680484 in std::sys_common::backtrace::__rust_begin_short_backtrace ()
#245 0x000055555556eb14 in std::thread::Builder::spawn::{{closure}}::{{closure}} ()
#246 0x0000555555623282 in <std::panic::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once ()
#247 0x00005555555ef78f in std::panicking::try::do_call ()
#248 0x00007ffff78f632f in __rust_maybe_catch_panic () at libpanic_unwind/lib.rs:102
#249 0x00005555555ef692 in std::panicking::try ()
#250 0x00005555556232c8 in std::panic::catch_unwind ()
#251 0x000055555556e92a in std::thread::Builder::spawn::{{closure}} ()
#252 0x000055555556ec4b in <F as alloc::boxed::FnBox<A>>::call_box ()
#253 0x00007ffff78ed58c in _$LT$alloc..boxed..Box$LT$alloc..boxed..FnBox$LT$A$C$$u20$Output$u3d$R$GT$$u20$$u2b$$u20$$u27$a$GT$$u20$as$u20$core..ops..function..FnOnce$LT$A$GT$$GT$::call_once::h598f9713c9cb9093 ()
    at /checkout/src/liballoc/boxed.rs:798
#254 std::sys_common::thread::start_thread () at libstd/sys_common/thread.rs:24
#255 std::sys::unix::thread::Thread::new::thread_start () at libstd/sys/unix/thread.rs:90
#256 0x00007ffff765a0bc in start_thread () from /usr/lib/libpthread.so.0
#257 0x00007ffff71782ff in clone () from /usr/lib/libc.so.6