Fix nested ? matchers

[mark-i-m]

fix #57597

I'm not 100% if this works yet...

cc @alercah

When this is ready (but perhaps not yet):

[petrochenkov]

LGTM, r=me once Travis is green

[rust-highfive]

The job x86_64-gnu-llvm-6.0 of your PR failed on Travis (raw log). Through arcane magic we have determined that the following fragments from the build log may contain information about the problem.

Click to expand the log.

travis_time:end:15f2dc7f:start=1547511467079056177,finish=1547511469206791470,duration=2127735293 $ git checkout -qf FETCH_HEAD travis_fold:end:git.checkout Encrypted environment variables have been removed for security reasons. See https://docs.travis-ci.com/user/pull-requests/#pull-requests-and-security-restrictions $ export SCCACHE_BUCKET=rust-lang-ci-sccache2 $ export SCCACHE_REGION=us-west-1 Setting environment variables from .travis.yml $ export IMAGE=x86_64-gnu-llvm-6.0 --- [01:12:40] .................................................................................................... 2500/5303 [01:12:44] .................................................................................................... 2600/5303 [01:12:48] .................................................................................................... 2700/5303 [01:12:54] .................................................................................................... 2800/5303 [01:12:58] .......F............................................................................................ 2900/5303 [01:13:06] .................................................................................................... 3100/5303 [01:13:10] ....................................................................................i............... 3200/5303 [01:13:14] .................................................................................................... 3300/5303 [01:13:18] ..............................................ii...i..ii............................................ 3400/5303 --- [01:14:39] [01:14:39] ---- [ui] ui/issues/issue-5067.rs stdout ---- [01:14:39] diff of stderr: [01:14:39] [01:14:39] - error: repetition matches empty token tree [01:14:39] - | [01:14:39] - | [01:14:39] - LL | ( $()* ) => {}; [01:14:39] - [01:14:39] - [01:14:39] - error: repetition matches empty token tree [01:14:39] - | [01:14:39] - | [01:14:39] - LL | ( $()+ ) => {}; [01:14:39] - [01:14:39] - [01:14:39] - error: repetition matches empty token tree [01:14:39] - | [01:14:39] - | [01:14:39] - LL | ( [$()*] ) => {}; [01:14:39] - [01:14:39] - [01:14:39] - error: repetition matches empty token tree [01:14:39] - | [01:14:39] - | [01:14:39] - LL | ( [$()+] ) => {}; [01:14:39] - [01:14:39] - [01:14:39] - error: repetition matches empty token tree [01:14:39] - | [01:14:39] - | [01:14:39] - LL | ( $($()* $(),* $(a)* $(a),* )* ) => {}; [01:14:39] - [01:14:39] - [01:14:39] - error: repetition matches empty token tree [01:14:39] - | [01:14:39] - | [01:14:39] - LL | ( $($()* $(),* $(a)* $(a),* )+ ) => {}; [01:14:39] - [01:14:39] - [01:14:39] - error: repetition matches empty token tree [01:14:39] - | [01:14:39] - | [01:14:39] - LL | ( $(a $()+)* ) => {}; [01:14:39] - [01:14:39] - [01:14:39] - error: repetition matches empty token tree [01:14:39] - | [01:14:39] - | [01:14:39] - LL | ( $(a $()*)+ ) => {}; [01:14:39] - [01:14:39] - [01:14:39] - error: repetition matches empty token tree [01:14:39] - | [01:14:39] - | [01:14:39] - LL | (a $e1:expr $($(, a $e2:expr)*)*) => ([$e1 $($(, $e2)*)*]); [01:14:39] - [01:14:39] - [01:14:39] - error: repetition matches empty token tree [01:14:39] - | [01:14:39] - | [01:14:39] - LL | ( $()* ) => {} [01:14:39] - [01:14:39] - error: aborting due to 10 previous errors [01:14:39] - [01:14:39] - [01:14:39] - [01:14:39] [01:14:39] [01:14:39] error: failed to delete `/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/issues/issue-5067/issue-5067.stderr`: No such file or directory (os error 2) [01:14:39] note: Run with `RUST_BACKTRACE=1` for a backtrace. [01:14:39] [01:14:39] [01:14:39] failures: [01:14:39] failures: [01:14:39] [ui] ui/issues/issue-5067.rs [01:14:39] [01:14:39] test result: FAILED. 5279 passed; 1 failed; 23 ignored; 0 measured; 0 filtered out [01:14:39] [01:14:39] thread 'main' panicked at 'Some tests failed', src/tools/compiletest/src/main.rs:495:22 [01:14:39] [01:14:39] [01:14:39] command did not execute successfully: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage0-tools-bin/compiletest" "--compile-lib-path" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/lib" "--run-lib-path" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/lib/rustlib/x86_64-unknown-linux-gnu/lib" "--rustc-path" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "--src-base" "/checkout/src/test/ui" "--build-base" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui" "--stage-id" "stage2-x86_64-unknown-linux-gnu" "--mode" "ui" "--target" "x86_64-unknown-linux-gnu" "--host" "x86_64-unknown-linux-gnu" "--llvm-filecheck" "/usr/lib/llvm-6.0/bin/FileCheck" "--host-rustcflags" "-Crpath -O -Zunstable-options -Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "--target-rustcflags" "-Crpath -O -Zunstable-options -Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "--docck-python" "/usr/bin/python2.7" "--lldb-python" "/usr/bin/python2.7" "--gdb" "/usr/bin/gdb" "--quiet" "--llvm-version" "6.0.0\n" "--system-llvm" "--cc" "" "--cxx" "" "--cflags" "" "--llvm-components" "" "--llvm-cxxflags" "" "--adb-path" "adb" "--adb-test-dir" "/data/tmp/work" "--android-cross-path" "" "--color" "always" [01:14:39] [01:14:39] [01:14:39] failed to run: /checkout/obj/build/bootstrap/debug/bootstrap test [01:14:39] Build completed unsuccessfully in 0:04:49 [01:14:39] Build completed unsuccessfully in 0:04:49 [01:14:39] make: *** [check] Error 1 [01:14:39] Makefile:48: recipe for target 'check' failed The command "stamp sh -x -c "$RUN_SCRIPT"" exited with 2. travis_time:start:09f07e98 $ date && (curl -fs --head https://google.com | grep ^Date: | sed 's/Date: //g' || true) Tue Jan 15 01:32:39 UTC 2019 

I'm a bot! I can only do what humans tell me to, so if this was not helpful or you have suggestions for improvements, please ping or otherwise contact @TimNN. (Feature Requests)

[mark-i-m]

I've been getting the following seeming-unrelated ICE... (maybe from the recent rollup?). I tried rebasing, so hopefully it will be resolved. I have to go ATM...

warning: unreachable arm --> src/test/ui/pattern/const-pat-ice.rs:9:18 | 9 | &&&42 => {}, | ^^ | = note: #[warn(unreachable_code)] on by default warning: unreachable pattern --> src/test/ui/pattern/const-pat-ice.rs:10:9 | 10 | FOO => {}, | ^^^ | = note: #[warn(unreachable_patterns)] on by default thread 'rustc' panicked at 'assertion failed: rows.iter().all(|r| r.len() == v.len())', src/librustc_mir/hair/pattern/_match.rs:1068:5 note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace. stack backtrace: 0: std::sys::unix::backtrace::tracing::imp::unwind_backtrace 1: std::sys_common::backtrace::print 2: std::panicking::default_hook::{{closure}} 3: std::panicking::default_hook 4: rustc::util::common::panic_hook 5: std::panicking::rust_panic_with_hook 6: std::panicking::begin_panic 7: rustc_mir::hair::pattern::_match::is_useful 8: rustc_mir::hair::pattern::_match::is_useful_specialized 9: <core::iter::Map<I, F> as core::iter::iterator::Iterator>::try_fold 10: rustc_mir::hair::pattern::_match::is_useful 11: rustc_mir::hair::pattern::_match::is_useful_specialized 12: <core::iter::Map<I, F> as core::iter::iterator::Iterator>::try_fold 13: rustc_mir::hair::pattern::_match::is_useful 14: rustc_mir::hair::pattern::check_match::check_arms 15: rustc_mir::hair::pattern::_match::MatchCheckCtxt::create_and_enter 16: <rustc_mir::hair::pattern::check_match::MatchVisitor<'a, 'tcx> as rustc::hir::intravisit::Visitor<'tcx>>::visit_expr 17: <rustc_mir::hair::pattern::check_match::MatchVisitor<'a, 'tcx> as rustc::hir::intravisit::Visitor<'tcx>>::visit_expr 18: <rustc_mir::hair::pattern::check_match::MatchVisitor<'a, 'tcx> as rustc::hir::intravisit::Visitor<'tcx>>::visit_body 19: rustc::session::Session::track_errors 20: rustc_mir::hair::pattern::check_match::check_match 21: rustc::ty::query::__query_compute::check_match 22: rustc::ty::query::<impl rustc::ty::query::config::QueryAccessors<'tcx> for rustc::ty::query::queries::check_match<'tcx>>::compute 23: rustc::dep_graph::graph::DepGraph::with_task_impl 24: rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt<'a, 'gcx, 'tcx>>::try_get_with 25: <rustc_mir::hair::pattern::check_match::OuterVisitor<'a, 'tcx> as rustc::hir::intravisit::Visitor<'tcx>>::visit_body 26: rustc::hir::intravisit::walk_item 27: rustc::hir::Crate::visit_all_item_likes 28: rustc_mir::hair::pattern::check_match::check_crate 29: rustc::util::common::time 30: <std::thread::local::LocalKey<T>>::with 31: rustc::ty::context::TyCtxt::create_and_enter 32: rustc_driver::driver::compile_input 33: <scoped_tls::ScopedKey<T>>::set 34: rustc_driver::run_compiler 35: <scoped_tls::ScopedKey<T>>::set query stack during panic: #0 [check_match] processing `main` end of query stack error: internal compiler error: unexpected panic note: the compiler unexpectedly panicked. this is a bug. note: we would appreciate a bug report: https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.md#bug-reports note: rustc 1.33.0-dev running on x86_64-unknown-linux-gnu 

[rust-highfive]

The job x86_64-gnu-llvm-6.0 of your PR failed on Travis (raw log). Through arcane magic we have determined that the following fragments from the build log may contain information about the problem.

Click to expand the log.

travis_time:end:00c2ddf3:start=1547579361463827115,finish=1547579365026042169,duration=3562215054 $ git checkout -qf FETCH_HEAD travis_fold:end:git.checkout Encrypted environment variables have been removed for security reasons. See https://docs.travis-ci.com/user/pull-requests/#pull-requests-and-security-restrictions $ export SCCACHE_BUCKET=rust-lang-ci-sccache2 $ export SCCACHE_REGION=us-west-1 Setting environment variables from .travis.yml $ export IMAGE=x86_64-gnu-llvm-6.0 --- [01:03:01] .................................................................................................... 2500/5306 [01:03:04] .................................................................................................... 2600/5306 [01:03:08] .................................................................................................... 2700/5306 [01:03:13] .................................................................................................... 2800/5306 [01:03:16] ...........F........................................................................................ 2900/5306 [01:03:23] .................................................................................................... 3100/5306 [01:03:27] ..........................................................................................i......... 3200/5306 [01:03:30] .................................................................................................... 3300/5306 [01:03:33] ....................................................ii...i...ii..................................... 3400/5306 --- [01:04:45] [01:04:45] ---- [ui] ui/issues/issue-5067.rs stdout ---- [01:04:45] diff of stderr: [01:04:45] [01:04:45] 1 error: repetition matches empty token tree [01:04:45] + --> $DIR/issue-5067.rs:9:8 [01:04:45] 3 | [01:04:45] 3 | [01:04:45] 4 LL | ( $()* ) => {}; [01:04:45] [01:04:45] 6 [01:04:45] 6 [01:04:45] 7 error: repetition matches empty token tree [01:04:45] + --> $DIR/issue-5067.rs:11:8 [01:04:45] 9 | [01:04:45] 9 | [01:04:45] 10 LL | ( $()+ ) => {}; [01:04:45] [01:04:45] 12 [01:04:45] 12 [01:04:45] 13 error: repetition matches empty token tree [01:04:45] + --> $DIR/issue-5067.rs:13:8 [01:04:45] 15 | [01:04:45] 15 | [01:04:45] + LL | ( $()? ) => {}; [01:04:45] + [01:04:45] + [01:04:45] + error: repetition matches empty token tree [01:04:45] + | [01:04:45] + | [01:04:45] 16 LL | ( [$()*] ) => {}; [01:04:45] 18 [01:04:45] [01:04:45] [01:04:45] 19 error: repetition matches empty token tree [01:04:45] + --> $DIR/issue-5067.rs:20:9 [01:04:45] 21 | [01:04:45] 21 | [01:04:45] 22 LL | ( [$()+] ) => {}; [01:04:45] [01:04:45] 24 [01:04:45] 24 [01:04:45] 25 error: repetition matches empty token tree [01:04:45] + --> $DIR/issue-5067.rs:22:9 [01:04:45] 27 | [01:04:45] 27 | [01:04:45] + LL | ( [$()?] ) => {}; [01:04:45] + [01:04:45] + [01:04:45] + error: repetition matches empty token tree [01:04:45] + | [01:04:45] + | [01:04:45] 28 LL | ( $($()* $(),* $(a)* $(a),* )* ) => {}; [01:04:45] 30 [01:04:45] [01:04:45] [01:04:45] 31 error: repetition matches empty token tree [01:04:45] + --> $DIR/issue-5067.rs:29:8 [01:04:45] 33 | [01:04:45] 33 | [01:04:45] 34 LL | ( $($()* $(),* $(a)* $(a),* )+ ) => {}; [01:04:45] [01:04:45] 36 [01:04:45] 36 [01:04:45] 37 error: repetition matches empty token tree [01:04:45] + --> $DIR/issue-5067.rs:31:8 [01:04:45] 39 | [01:04:45] 39 | [01:04:45] + LL | ( $($()* $(),* $(a)* $(a),* )? ) => {}; [01:04:45] + [01:04:45] + [01:04:45] + error: repetition matches empty token tree [01:04:45] + | [01:04:45] + | [01:04:45] + LL | ( $($()? $(),* $(a)? $(a),* )* ) => {}; [01:04:45] + [01:04:45] + [01:04:45] + error: repetition matches empty token tree [01:04:45] + | [01:04:45] + | [01:04:45] + LL | ( $($()? $(),* $(a)? $(a),* )+ ) => {}; [01:04:45] + [01:04:45] + [01:04:45] + error: repetition matches empty token tree [01:04:45] + | [01:04:45] + | [01:04:45] + LL | ( $($()? $(),* $(a)? $(a),* )? ) => {}; [01:04:45] + [01:04:45] + [01:04:45] + error: repetition matches empty token tree [01:04:45] + | [01:04:45] + | [01:04:45] 40 LL | ( $(a $()+)* ) => {}; [01:04:45] 42 [01:04:45] [01:04:45] [01:04:45] 43 error: repetition matches empty token tree [01:04:45] + --> $DIR/issue-5067.rs:49:12 [01:04:45] 45 | [01:04:45] 45 | [01:04:45] 46 LL | ( $(a $()*)+ ) => {}; [01:04:45] [01:04:45] 48 [01:04:45] 48 [01:04:45] 49 error: repetition matches empty token tree [01:04:45] + --> $DIR/issue-5067.rs:51:12 [01:04:45] 51 | [01:04:45] 51 | [01:04:45] + LL | ( $(a $()+)? ) => {}; [01:04:45] + [01:04:45] + [01:04:45] + error: repetition matches empty token tree [01:04:45] + | [01:04:45] + | [01:04:45] + LL | ( $(a $()?)+ ) => {}; [01:04:45] + [01:04:45] + [01:04:45] + error: repetition matches empty token tree [01:04:45] + | [01:04:45] + | [01:04:45] 52 LL | (a $e1:expr $($(, a $e2:expr)*)*) => ([$e1 $($(, $e2)*)*]); [01:04:45] 54 [01:04:45] [01:04:45] [01:04:45] 55 error: repetition matches empty token tree [01:04:45] + --> $DIR/issue-5067.rs:71:8 [01:04:45] 57 | [01:04:45] 57 | [01:04:45] - LL | ( $()* ) => {} [01:04:45] + LL | ( $()* ) => {}; [01:04:45] 60 [01:04:45] 60 [01:04:45] - error: aborting due to 1{};","highlight_start":8,"highlight_end":10}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"error: repetition matches empty token tree\n --> /checkout/src/test/ui/issues/issue-5067.rs:9:8\n |\nLL | ( $()* ) => {};\n | ^^\n\n"} [01:04:45] {"message":"repetition matches empty token tree","code":null,"level":"error","spans":[{"file_name":"/checkout/src/test/ui/issues/issue-5067.rs","byte_start":245,"byte_end":247,"line_start":11,"line_end":11,"column_start":8,"column_end":10,"is_primary":true,"text":[{"text":" ( $()+ ) => {};","highlight_start":8,"highlight_end":10}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"error: repetition matches empty token tree\n --> /checkout/src/test/ui/issues/issue-5067.rs:11:8\n |\nLL | ( $()+ ) => {};\n | ^^\n\n"} [01:04:45] {"message":"repetition matches empty token tree","code":null,"level":"error","spans":[{"file_name":"/checkout/src/test/ui/issues/issue-5067.rs","byte_start":316,"byte_end":318,"line_start":13,"line_end":13,"column_start":8,"column_end":10,"is_primary":true,"text":[{"text":" ( $()? ) => {};","highlight_start":8,"highlight_end":10}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"error: repetition matches empty token tree\n --> /checkout/src/test/ui/issues/issue-5067.rs:13:8\n |\nLL | ( $()? ) => {};\n | ^^\n\n"} [01:04:45] {"message":"repetition matches empty token tree","code":null,"level":"error","spans":[{"file_name":"/checkout/src/test/ui/issues/issue-5067.rs","byte_start":484,"byte_end":486,"line_start":18,"line_end":18,"column_start":9,"column_end":11,"is_primary":true,"text":[{"text":" ( [$()*] ) => {};","highlight_start":9,"highlight_end":11}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"error: repetition matches empty token tree\n --> /checkout/src/test/ui/issues/issue-5067.rs:18:9\n |\nLL | ( [$()*] ) => {};\n | ^^\n\n"} [01:04:45] {"message":"repetition matches empty token tree","code":null,"level":"error","spans":[{"file_name":"/checkout/src/test/ui/issues/issue-5067.rs","byte_start":557,"byte_end":559,"line_start":20,"line_end":20,"column_start":9,"column_end":11,"is_primary":true,"text":[{"text":" ( [$()+] ) => {};","highlight_start":9,"highlight_end":11}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"error: repetition matches empty token tree\n --> /checkout/src/test/ui/issues/issue-5067.rs:20:9\n |\nLL | ( [$()+] ) => {};\n | ^^\n\n"} [01:04:45] {"message":"repetition matches empty token tree","code":null,"level":"error","spans":[{"file_name":"/checkout/src/test/ui/issues/issue-5067.rs","byte_start":630,"byte_end":632,"line_start":22,"line_end":22,"column_start":9,"column_end":11,"is_primary":true,"text":[{"text":" ( [$()?] ) => {};","highlight_start":9,"highlight_end":11}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"error: repetition matches empty token tree\n --> /checkout/src/test/ui/issues/issue-5067.rs:22:9\n |\nLL | ( [$()?] ) => {};\n | ^^\n\n"} [01:04:45] {"message":"repetition matches empty token tree","code":null,"level":"error","spans":[{"file_name":"/checkout/src/test/ui/issues/issue-5067.rs","byte_start":802,"byte_end":828,"line_start":27,"line_end":27,"column_start":8,"column_end":34,"is_primary":true,"text":[{"text":" ( $($()* $(),* $(a)* $(a),* )* ) => {};","highlight_start":8,"highlight_end":34}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"error: repetition matches empty token tree\n --> /checkout/src/test/ui/issues/issue-5067.rs:27:8\n |\nLL | ( $($()* $(),* $(a)* $(a),* )* ) => {};\n | ^^^^^^^^^^^^^^^^^^^^^^^^^^\n\n"} [01:04:45] {"message":"repetition matches empty token tree","code":null,"level":"error","spans":[{"file_name":"/checkout/src/test/ui/issues/issue-5067.rs","byte_start":897,"byte_end":923,"line_start":29,"line_end":29,"column_start":8,"column_end":34,"is_primary":true,"text":[{"text":" ( $($()* $(),* $(a)* $(a),* )+ ) => {};","highlight_start":8,"highlight_end":34}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"error: repetition matches empty token tree\n --> /checkout/src/test/ui/issues/issue-5067.rs:29:8\n |\nLL | ( $($()* $(),* $(a)* $(a),* )+ ) => {};\n | ^^^^^^^^^^^^^^^^^^^^^^^^^^\n\n"} [01:04:45] {"message":"repetition matches empty token tree","code":null,"level":"error","spans":[{"file_name":"/checkout/src/test/ui/issues/issue-5067.rs","byte_start":992,"byte_end":1018,"line_start":31,"line_end":31,"column_start":8,"column_end":34,"is_primary":true,"text":[{"text":" ( $($()* $(),* $(a)* $(a),* )? ) => {};","highlight_start":8,"highlight_end":34}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"error: repetition matches empty token tree\n --> /checkout/src/test/ui/issues/issue-5067.rs:31:8\n |\nLL | ( $($()* $(),* $(a)* $(a),* )? ) => {};\n | ^^^^^^^^^^^^^^^^^^^^^^^^^^\n\n"} [01:04:45] {"message":"repetition matches empty token tree","code":null,"level":"error","spans":[{"file_name":"/checkout/src/test/ui/issues/issue-5067.rs","byte_start":1087,"byte_end":1113,"line_start":33,"line_end":33,"column_start":8,"column_end":34,"is_primary":true,"text":[{"text":" ( $($()? $(),* $(a)? $(a),* )* ) => {};","highlight_start":8,"highlight_end":34}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"error: repetition matches empty token tree\n --> /checkout/src/test/ui/issues/issue-5067.rs:33:8\n |\nLL | ( $($()? $(),* $(a)? $(a),* )* ) => {};\n | ^^^^^^^^^^^^^^^^^^^^^^^^^^\n\n"} [01:04:45] {"message":"repetition matches empty token tree","code":null,"level":"error","spans":[{"file_name":"/checkout/src/test/ui/issues/issue-5067.rs","byte_start":1182,"byte_end":1208,"line_start":35,"line_end":35,"column_start":8,"column_end":34,"is_primary":true,"text":[{"text":" ( $($()? $(),* $(a)? $(a),* )+ ) => {};","highlight_start":8,"highlight_end":34}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"error: repetition matches empty token tree\n --> /checkout/src/test/ui/issues/issue-5067.rs:35:8\n |\nLL | ( $($()? $(),* $(a)? $(a),* )+ ) => {};\n | ^^^^^^^^^^^^^^^^^^^^^^^^^^\n\n"} [01:04:45] {"message":"repetition matches empty token tree","code":null,"level":"error","spans":[{"file_name":"/checkout/src/test/ui/issues/issue-5067.rs","byte_start":1277,"byte_end":1303,"line_start":37,"line_end":37,"column_start":8,"column_end":34,"is_primary":true,"text":[{"text":" ( $($()? $(),* $(a)? $(a),* )? ) => {};","highlight_start":8,"highlight_end":34}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"error: repetition matches empty token tree\n --> /checkout/src/test/ui/issues/issue-5067.rs:37:8\n |\nLL | ( $($()? $(),* $(a)? $(a),* )? ) => {};\n | ^^^^^^^^^^^^^^^^^^^^^^^^^^\n\n"} [01:04:45] {"message":"repetition matches empty token tree","code":null,"level":"error","spans":[{"file_name":"/checkout/src/test/ui/issues/issue-5067.rs","byte_start":1696,"byte_end":1698,"line_start":47,"line_end":47,"column_start":12,"column_end":14,"is_primary":true,"text":[{"text":" ( $(a $()+)* ) => {};","highlight_start":12,"highlight_end":14}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"error: repetition matches empty token tree\n --> /checkout/src/test/ui/issues/issue-5067.rs:47:12\n |\nLL | ( $(a $()+)* ) => {};\n | ^^\n\n"} [01:04:45] {"message":"repetition matches empty token tree","code":null,"level":"error","spans":[{"file_name":"/checkout/src/test/ui/issues/issue-5067.rs","byte_start":1773,"byte_end":1775,"line_start":49,"line_end":49,"column_start":12,"column_end":14,"is_primary":true,"text":[{"text":" ( $(a $()*)+ ) => {};","highlight_start":12,"highlight_end":14}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"error: repetition matches empty token tree\n --> /checkout/src/test/ui/issues/issue-5067.rs:49:12\n |\nLL | ( $(a $()*)+ ) => {};\n | ^^\n\n"} [01:04:45] {"message":"repetition matches empty token tree","code":null,"level":"error","spans":[{"file_name":"/checkout/src/test/ui/issues/issue-5067.rs","byte_start":1850,"byte_end":1852,"line_start":51,"line_end":51,"column_start":12,"column_end":14,"is_primary":true,"text":[{"text":" ( $(a $()+)? ) => {};","highlight_start":12,"highlight_end":14}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"error: repetition matches empty token tree\n --> /checkout/src/test/ui/issues/issue-5067.rs:51:12\n |\nLL | ( $(a $()+)? ) => {};\n | ^^\n\n"} [01:04:45] {"message":"repetition matches empty token tree","code":null,"level":"error","spans":[{"file_name":"/checkout/src/test/ui/issues/issue-5067.rs","byte_start":1927,"byte_end":1929,"line_start":53,"line_end":53,"column_start":12,"column_end":14,"is_primary":true,"text":[{"text":" ( $(a $()?)+ ) => {};","highlight_start":12,"highlight_end":14}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"error: repetition matches empty token tree\n --> /checkout/src/test/ui/issues/issue-5067.rs:53:12\n |\nLL | ( $(a $()?)+ ) => {};\n | ^^\n\n"} [01:04:45] {"message":"repetition matches empty token tree","code":null,"level":"error","spans":[{"file_name":"/checkout/src/test/ui/issues/issue-5067.rs","byte_start":2067,"byte_end":2085,"line_start":60,"line_end":60,"column_start":18,"column_end":36,"is_primary":true,"text":[{"text":" (a $e1:expr $($(, a $e2:expr)*)*) => ([$e1 $($(, $e2)*)*]);","highlight_start":18,"highlight_end":36}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"error: repetition matches empty token tree\n --> /checkout/src/test/ui/issues/issue-5067.rs:60:18\n |\nLL | (a $e1:expr $($(, a $e2:expr)*)*) => ([$e1 $($(, $e2)*)*]);\n | ^^^^^^^^^^^^^^^^^^\n\n"} [01:04:45] {"message":"repetition matches empty token tree","code":null,"level":"error","spans":[{"file_name":"/checkout/src/test/ui/issues/issue-5067.rs","byte_start":2275,"byte_end":2277,"line_start":71,"line_end":71,"column_start":8,"column_end":10,"is_primary":true,"text":[{"text":" ( $()* ) => {};","highlight_start":8,"highlight_end":10}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"error: repetition matches empty token tree\n --> /checkout/src/test/ui/issues/issue-5067.rs:71:8\n |\nLL | ( $()* ) => {};\n | ^^\n\n"} [01:04:45] {"message":"aborting due to 18 previous errors","code":null,"level":"error","spans":[],"children":[],"rendered":"error: aborting due to 18 previous errors\n\n"} [01:04:45] ------------------------------------------ [01:04:45] [01:04:45] thread '[ui] ui/issues/issue-5067.rs' panicked at 'explicit panic', src/tools/compiletest/src/runtest.rs:3245:9 [01:04:45] note: Run with `RUST_BACKTRACE=1` for a backtrace. --- [01:04:45] [01:04:45] thread 'main' panicked at 'Some tests failed', src/tools/compiletest/src/main.rs:495:22 [01:04:45] [01:04:45] [01:04:45] command did not execute successfully: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage0-tools-bin/compiletest" "--compile-lib-path" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/lib" "--run-lib-path" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/lib/rustlib/x86_64-unknown-linux-gnu/lib" "--rustc-path" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "--src-base" "/checkout/src/test/ui" "--build-base" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui" "--stage-id" "stage2-x86_64-unknown-linux-gnu" "--mode" "ui" "--target" "x86_64-unknown-linux-gnu" "--host" "x86_64-unknown-linux-gnu" "--llvm-filecheck" "/usr/lib/llvm-6.0/bin/FileCheck" "--host-rustcflags" "-Crpath -O -Zunstable-options -Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "--target-rustcflags" "-Crpath -O -Zunstable-options -Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "--docck-python" "/usr/bin/python2.7" "--lldb-python" "/usr/bin/python2.7" "--gdb" "/usr/bin/gdb" "--quiet" "--llvm-version" "6.0.0\n" "--system-llvm" "--cc" "" "--cxx" "" "--cflags" "" "--llvm-components" "" "--llvm-cxxflags" "" "--adb-path" "adb" "--adb-test-dir" "/data/tmp/work" "--android-cross-path" "" "--color" "always" [01:04:45] [01:04:45] [01:04:45] failed to run: /checkout/obj/build/bootstrap/debug/bootstrap test [01:04:45] Build completed unsuccessfully in 0:04:09 [01:04:45] Build completed unsuccessfully in 0:04:09 [01:04:45] make: *** [check] Error 1 [01:04:45] Makefile:48: recipe for target 'check' failed The command "stamp sh -x -c "$RUN_SCRIPT"" exited with 2. travis_time:start:0f4d6d45 $ date && (curl -fs --head https://google.com | grep ^Date: | sed 's/Date: //g' || true) Tue Jan 15 20:14:20 UTC 2019 --- travis_time:end:22066d4c:start=1547583262011044114,finish=1547583262016416477,duration=5372363 travis_fold:end:after_failure.3 travis_fold:start:after_failure.4 travis_time:start:00666b1c $ ln -s . checkout && for CORE in obj/cores/core.*; do EXE=$(echo $CORE | sed 's|obj/cores/core\.[0-9]*\.!checkout!\(.*\)|\1|;y|!|/|' 

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@petrochenkov travis is green 🍏

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📌 Commit aa1ce32 has been approved by petrochenkov