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regression 1.46 -> 1.47 big-endian backtrace-related UI tests failing #77410

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regression 1.46 -> 1.47 big-endian backtrace-related UI tests failing#77410
#77731
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nagisa
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A-runtimeArea: std's runtime and "pre-main" init for handling backtraces, unwinds, stack overflowsC-bugCategory: This is a bug.O-PowerPCTarget: PowerPC processorsO-SPARCTarget: SPARC processorsO-SystemZTarget: SystemZ processors (s390x)P-highHigh priorityT-libsRelevant to the library team, which will review and decide on the PR/issue.T-libs-apiRelevant to the library API team, which will review and decide on the PR/issue.regression-from-stable-to-stablePerformance or correctness regression from one stable version to another.
@infinity0

Description

@infinity0
infinity0
opened on Oct 1, 2020
Contributor
test [ui] ui/backtrace-debuginfo.rs ... FAILED
test [ui] ui/backtrace.rs ... FAILED
test [ui] ui/std-backtrace.rs ... FAILED

In all cases, we are using gdb 9.2 and LLVM 10.

The tests themselves haven't changed since ~1.38, so it must be an actual behavioural change in rustc.

ui/backtrace-debuginfo.rs 
---- [ui] ui/backtrace-debuginfo.rs stdout ----


executing "/<<PKGBUILDDIR>>/build/s390x-unknown-linux-gnu/stage2/bin/rustc" "/<<PKGBUILDDIR>>/src/test/ui/backtrace-debuginfo.rs" "-Zthreads=1" "--target=s390x-unknown-linux-gnu" "--error-format" "json" "-Zui-testing" "-Zdeduplicate-diagnostics=no" "-C" "prefer-dynamic" "-o" "/<<PKGBUILDDIR>>/build/s390x-unknown-linux-gnu/test/ui/backtrace-debuginfo/a" "-Crpath" "-O" "-Zunstable-options" "-Lnative=/<<PKGBUILDDIR>>/build/s390x-unknown-linux-gnu/native/rust-test-helpers" "-Clinker=s390x-linux-gnu-gcc" "-g" "-Cllvm-args=-enable-tail-merge=0" "-Cllvm-args=-opt-bisect-limit=0" "-Cforce-frame-pointers=yes" "-L" "/<<PKGBUILDDIR>>/build/s390x-unknown-linux-gnu/test/ui/backtrace-debuginfo/auxiliary"
------stdout------------------------------

------stderr------------------------------
BISECT: NOT running pass (1) Simplify the CFG on function (_ZN100_$LT$core..slice..Iter$LT$T$GT$$u20$as$u20$core..iter..traits..double_ended..DoubleEndedIterator$GT$9next_back17hba41810a48013369E)
BISECT: NOT running pass (2) SROA on function (_ZN100_$LT$core..slice..Iter$LT$T$GT$$u20$as$u20$core..iter..traits..double_ended..DoubleEndedIterator$GT$9next_back17hba41810a48013369E)
[.. snip ..]
BISECT: NOT running pass (151906) Stack Slot Coloring on function (main)
BISECT: NOT running pass (151907) Machine Copy Propagation Pass on function (main)
BISECT: NOT running pass (151908) Machine Loop Invariant Code Motion on function (main)
BISECT: NOT running pass (151909) PostRA Machine Sink on function (main)
BISECT: NOT running pass (151910) Shrink Wrapping analysis on function (main)
BISECT: NOT running pass (151911) Control Flow Optimizer on function (main)
BISECT: NOT running pass (151912) Tail Duplication on function (main)
BISECT: NOT running pass (151913) Machine Copy Propagation Pass on function (main)
BISECT: NOT running pass (151914) If Converter on function (main)
BISECT: NOT running pass (151915) Branch Probability Basic Block Placement on function (main)
BISECT: NOT running pass (151916) SystemZ Instruction Shortening on function (main)
BISECT: NOT running pass (151917) SystemZ Comparison Elimination on function (main)
BISECT: NOT running pass (151918) PostRA Machine Instruction Scheduler on function (main)

------------------------------------------
executing "/<<PKGBUILDDIR>>/build/s390x-unknown-linux-gnu/test/ui/backtrace-debuginfo/a"
------stdout------------------------------
---------------------------------------
trace does not match position list
still need to find ["backtrace-debuginfo.rs:189", "backtrace-debuginfo.rs:125"]

--- stdout
backtrace-debuginfo.rs:125
backtrace-debuginfo.rs:189

--- stderr
test case 0
thread 'main' panicked at 'explicit panic', /<<PKGBUILDDIR>>/src/test/ui/backtrace-debuginfo.rs:86:5
stack backtrace:
   0:      0x3ff7f781048 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hf75f205f89fe00ed
   1:      0x3ff7f898448 - core::fmt::write::h4f1c2070906884a3
   2:      0x3ff7f780a02 - std::io::Write::write_fmt::h226b2e1f14ad2764
   3:      0x3ff7f7c415e - std::panicking::default_hook::h9ae8480279f42440
   4:      0x3ff7f7c4ff8 - std::panicking::rust_panic_with_hook::haa0e4552a4685cd1
   5:      0x2aa08f936b6 - <unknown>
   6:      0x2aa08f934ee - <unknown>
   7:      0x2aa08f9e64e - <unknown>
   8:      0x2aa08f9102a - <unknown>
   9:      0x2aa08f91586 - <unknown>
  10:      0x2aa08f920cc - <unknown>
  11:      0x2aa08f93766 - <unknown>
  12:      0x2aa08f9354a - <unknown>
  13:      0x2aa08f93600 - <unknown>
  14:      0x3ff7f7c49e2 - std::panicking::try::do_call::hb8645513a8eb3708
  15:      0x3ff7f7c6834 - __rust_try.llvm.10017331706622121556
  16:      0x3ff7f7c5520 - std::rt::lang_start_internal::h8d96ae79e52a8f4b
  17:      0x2aa08f935ce - <unknown>
  18:      0x2aa08f9216e - <unknown>
  19:      0x3ff7f42b3ce - __libc_start_main
  20:      0x2aa08f834f4 - <unknown>
  21:                0x0 - <unknown>

---------------------------------------
trace does not match position list
still need to find ["backtrace-debuginfo.rs:189", "backtrace-debuginfo.rs:125"]

--- stdout
backtrace-debuginfo.rs:125
backtrace-debuginfo.rs:189

--- stderr
test case 1
thread 'main' panicked at 'explicit panic', /<<PKGBUILDDIR>>/src/test/ui/backtrace-debuginfo.rs:87:5
stack backtrace:
   0:      0x3ffa0201048 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hf75f205f89fe00ed
   1:      0x3ffa0318448 - core::fmt::write::h4f1c2070906884a3
   2:      0x3ffa0200a02 - std::io::Write::write_fmt::h226b2e1f14ad2764
   3:      0x3ffa024415e - std::panicking::default_hook::h9ae8480279f42440
   4:      0x3ffa0244ff8 - std::panicking::rust_panic_with_hook::haa0e4552a4685cd1
   5:      0x2aa182136b6 - <unknown>
   6:      0x2aa182134ee - <unknown>
   7:      0x2aa1821e64e - <unknown>
   8:      0x2aa182110c6 - <unknown>
   9:      0x2aa18211586 - <unknown>
  10:      0x2aa182120cc - <unknown>
  11:      0x2aa18213766 - <unknown>
  12:      0x2aa1821354a - <unknown>
  13:      0x2aa18213600 - <unknown>
  14:      0x3ffa02449e2 - std::panicking::try::do_call::hb8645513a8eb3708
  15:      0x3ffa0246834 - __rust_try.llvm.10017331706622121556
  16:      0x3ffa0245520 - std::rt::lang_start_internal::h8d96ae79e52a8f4b
  17:      0x2aa182135ce - <unknown>
  18:      0x2aa1821216e - <unknown>
  19:      0x3ff9feab3ce - __libc_start_main
  20:      0x2aa182034f4 - <unknown>
  21:                0x0 - <unknown>

---------------------------------------
trace does not match position list
still need to find ["backtrace-debuginfo.rs:189", "backtrace-debuginfo.rs:125", "backtrace-debuginfo.rs:88", "backtrace-debuginfo-aux.rs:6"]

--- stdout
backtrace-debuginfo-aux.rs:6
backtrace-debuginfo.rs:88
backtrace-debuginfo.rs:125
backtrace-debuginfo.rs:189

--- stderr
test case 2
thread 'main' panicked at 'explicit panic', /<<PKGBUILDDIR>>/src/test/ui/backtrace-debuginfo.rs:89:9
stack backtrace:
   0:      0x3ffadb01048 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hf75f205f89fe00ed
   1:      0x3ffadc18448 - core::fmt::write::h4f1c2070906884a3
   2:      0x3ffadb00a02 - std::io::Write::write_fmt::h226b2e1f14ad2764
   3:      0x3ffadb4415e - std::panicking::default_hook::h9ae8480279f42440
   4:      0x3ffadb44ff8 - std::panicking::rust_panic_with_hook::haa0e4552a4685cd1
   5:      0x2aa366936b6 - <unknown>
   6:      0x2aa366934ee - <unknown>
   7:      0x2aa3669e64e - <unknown>
   8:      0x2aa36693404 - <unknown>
   9:      0x2aa36693340 - <unknown>
  10:      0x2aa36691082 - <unknown>
  11:      0x2aa36691586 - <unknown>
  12:      0x2aa366920cc - <unknown>
  13:      0x2aa36693766 - <unknown>
  14:      0x2aa3669354a - <unknown>
  15:      0x2aa36693600 - <unknown>
  16:      0x3ffadb449e2 - std::panicking::try::do_call::hb8645513a8eb3708
  17:      0x3ffadb46834 - __rust_try.llvm.10017331706622121556
  18:      0x3ffadb45520 - std::rt::lang_start_internal::h8d96ae79e52a8f4b
  19:      0x2aa366935ce - <unknown>
  20:      0x2aa3669216e - <unknown>
  21:      0x3ffad7ab3ce - __libc_start_main
  22:      0x2aa366834f4 - <unknown>
  23:                0x0 - <unknown>

[.. snip .. many more examples like this ..]


------------------------------------------
stderr:
------------------------------------------
thread 'main' panicked at 'found some errors', /<<PKGBUILDDIR>>/src/test/ui/backtrace-debuginfo.rs:179:9
stack backtrace:
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

------------------------------------------
ui/backtrace.rs 
---- [ui] ui/backtrace.rs stdout ----


executing "/<<PKGBUILDDIR>>/build/s390x-unknown-linux-gnu/stage2/bin/rustc" "/<<PKGBUILDDIR>>/src/test/ui/backtrace.rs" "-Zthreads=1" "--target=s390x-unknown-linux-gnu" "--error-format" "json" "-Zui-testing" "-Zdeduplicate-diagnostics=no" "-C" "prefer-dynamic" "-o" "/<<PKGBUILDDIR>>/build/s390x-unknown-linux-gnu/test/ui/backtrace/a" "-Crpath" "-O" "-Zunstable-options" "-Lnative=/<<PKGBUILDDIR>>/build/s390x-unknown-linux-gnu/native/rust-test-helpers" "-Clinker=s390x-linux-gnu-gcc" "-g" "-L" "/<<PKGBUILDDIR>>/build/s390x-unknown-linux-gnu/test/ui/backtrace/auxiliary"
------stdout------------------------------

------stderr------------------------------

------------------------------------------
executing "/<<PKGBUILDDIR>>/build/s390x-unknown-linux-gnu/test/ui/backtrace/a"
------stdout------------------------------

------stderr------------------------------
thread 'main' panicked at 'bad output: thread 'main' panicked at 'explicit panic', /<<PKGBUILDDIR>>/src/test/ui/backtrace.rs:18:9
stack backtrace:
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
', /<<PKGBUILDDIR>>/src/test/ui/backtrace.rs:68:5
stack backtrace:
   0: rust_begin_unwind
   1: std::panicking::begin_panic_fmt
   2: <unknown>
   3: <unknown>
   4: <unknown>
   5: std::panicking::try::do_call
   6: __rust_try.llvm.10017331706622121556
   7: std::rt::lang_start_internal
   8: <unknown>
   9: __libc_start_main
  10: <unknown>
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

------------------------------------------

error: test run failed!
status: exit code: 101
command: "/<<PKGBUILDDIR>>/build/s390x-unknown-linux-gnu/test/ui/backtrace/a"
stdout:
------------------------------------------

------------------------------------------
stderr:
------------------------------------------
thread 'main' panicked at 'bad output: thread 'main' panicked at 'explicit panic', /<<PKGBUILDDIR>>/src/test/ui/backtrace.rs:18:9
stack backtrace:
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
', /<<PKGBUILDDIR>>/src/test/ui/backtrace.rs:68:5
stack backtrace:
   0: rust_begin_unwind
   1: std::panicking::begin_panic_fmt
   2: <unknown>
   3: <unknown>
   4: <unknown>
   5: std::panicking::try::do_call
   6: __rust_try.llvm.10017331706622121556
   7: std::rt::lang_start_internal
   8: <unknown>
   9: __libc_start_main
  10: <unknown>
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

------------------------------------------
ui/std-backtrace.rs 
---- [ui] ui/std-backtrace.rs stdout ----


executing "/<<PKGBUILDDIR>>/build/s390x-unknown-linux-gnu/stage2/bin/rustc" "/<<PKGBUILDDIR>>/src/test/ui/std-backtrace.rs" "-Zthreads=1" "--target=s390x-unknown-linux-gnu" "--error-format" "json" "-Zui-testing" "-Zdeduplicate-diagnostics=no" "-C" "prefer-dynamic" "-o" "/<<PKGBUILDDIR>>/build/s390x-unknown-linux-gnu/test/ui/std-backtrace/a" "-Crpath" "-O" "-Zunstable-options" "-Lnative=/<<PKGBUILDDIR>>/build/s390x-unknown-linux-gnu/native/rust-test-helpers" "-Clinker=s390x-linux-gnu-gcc" "-g" "-L" "/<<PKGBUILDDIR>>/build/s390x-unknown-linux-gnu/test/ui/std-backtrace/auxiliary"
------stdout------------------------------

------stderr------------------------------

------------------------------------------
executing "/<<PKGBUILDDIR>>/build/s390x-unknown-linux-gnu/test/ui/std-backtrace/a"
------stdout------------------------------

------stderr------------------------------
thread 'main' panicked at 'assertion failed: String::from_utf8_lossy(&p.stdout).contains("backtrace::main")', /<<PKGBUILDDIR>>/src/test/ui/std-backtrace.rs:35:5
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

------------------------------------------

error: test run failed!
status: exit code: 101
command: "/<<PKGBUILDDIR>>/build/s390x-unknown-linux-gnu/test/ui/std-backtrace/a"
stdout:
------------------------------------------

------------------------------------------
stderr:
------------------------------------------
thread 'main' panicked at 'assertion failed: String::from_utf8_lossy(&p.stdout).contains("backtrace::main")', /<<PKGBUILDDIR>>/src/test/ui/std-backtrace.rs:35:5
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

------------------------------------------

Activity

infinity0

infinity0 commented on Oct 1, 2020

@infinity0
infinity0
on Oct 1, 2020
ContributorAuthor

@alexcrichton could this be related to #74682 ?

jonas-schievink
added
A-runtimeArea: std's runtime and "pre-main" init for handling backtraces, unwinds, stack overflows
C-bugCategory: This is a bug.
T-libsRelevant to the library team, which will review and decide on the PR/issue.
O-PowerPCTarget: PowerPC processors
O-SPARCTarget: SPARC processors
O-SystemZTarget: SystemZ processors (s390x)
regression-from-stable-to-stablePerformance or correctness regression from one stable version to another.
on Oct 1, 2020
rustbot
added
I-prioritizeIssue: Indicates that prioritization has been requested for this issue.
on Oct 1, 2020
alexcrichton

alexcrichton commented on Oct 1, 2020

@alexcrichton
alexcrichton
on Oct 1, 2020
Member

Seems likely! If this is happening on big-endian platforms then there's likely an issue with endianness in (most likely) src/backtrace/gimli/*.rs. It could also be in gimli itself or addr2line, but it seems most likely to be in the integration in the backtrace crate itself.

jyn514

jyn514 commented on Oct 7, 2020

@jyn514
jyn514
on Oct 7, 2020
Member

Related: #77424

camelid
added
T-libs-apiRelevant to the library API team, which will review and decide on the PR/issue.
on Oct 7, 2020
camelid

camelid commented on Oct 7, 2020

@camelid
camelid
on Oct 7, 2020
Member

Assigning P-high and removing I-prioritize as discussed in the prioritization working group.

camelid
added
I-nominated
and removed
I-prioritizeIssue: Indicates that prioritization has been requested for this issue.
on Oct 7, 2020

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A-runtimeArea: std's runtime and "pre-main" init for handling backtraces, unwinds, stack overflowsC-bugCategory: This is a bug.O-PowerPCTarget: PowerPC processorsO-SPARCTarget: SPARC processorsO-SystemZTarget: SystemZ processors (s390x)P-highHigh priorityT-libsRelevant to the library team, which will review and decide on the PR/issue.T-libs-apiRelevant to the library API team, which will review and decide on the PR/issue.regression-from-stable-to-stablePerformance or correctness regression from one stable version to another.

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      regression 1.46 -> 1.47 big-endian backtrace-related UI tests failing · Issue #77410 · rust-lang/rust