crash

[szecket]

Bug Description

   Compiling slint-lsp v1.10.0 (/Users/szecket/Documents/dev/slint-ui/slint/tools/lsp)
error: failed to run custom build command for `slint-lsp v1.10.0 (/Users/szecket/Documents/dev/slint-ui/slint/tools/lsp)`
note: To improve backtraces for build dependencies, set the CARGO_PROFILE_DEV_BUILD_OVERRIDE_DEBUG=true environment variable to enable debug information generation.

Caused by:
  process didn't exit successfully: `/Users/szecket/Documents/dev/slint-ui/slint/target/debug/build/slint-lsp-82fc24cdca6df15c/build-script-build` (exit status: 101)
  --- stderr
  thread 'main' panicked at internal/compiler/llr/lower_expression.rs:43:34:
  called `Option::unwrap()` on a `None` value
  stack backtrace:
     0:        0x104c9f030 - std::backtrace_rs::backtrace::libunwind::trace::h1577399c90b5d8c7
                                 at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/../../backtrace/src/backtrace/libunwind.rs:116:5
     1:        0x104c9f030 - std::backtrace_rs::backtrace::trace_unsynchronized::h1e626537f2a2dae5
                                 at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
     2:        0x104c9f030 - std::sys::backtrace::_print_fmt::hdfc6c57ce8e8814f
                                 at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/sys/backtrace.rs:66:9
     3:        0x104c9f030 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::hadba1856081fe8dc
                                 at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/sys/backtrace.rs:39:26
     4:        0x104cba6f4 - core::fmt::rt::Argument::fmt::h2642ab69bd81711d
                                 at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/core/src/fmt/rt.rs:177:76
     5:        0x104cba6f4 - core::fmt::write::h5358bd20891469bc
                                 at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/core/src/fmt/mod.rs:1189:21
     6:        0x104c9c22c - std::io::Write::write_fmt::hbf0611cc5d72cc91
                                 at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/io/mod.rs:1884:15
     7:        0x104c9eee4 - std::sys::backtrace::BacktraceLock::print::he2302a8c253c9a13
                                 at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/sys/backtrace.rs:42:9
     8:        0x104c9fe30 - std::panicking::default_hook::{{closure}}::hec1f77a77d7e7ffc
                                 at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/panicking.rs:268:22
     9:        0x104c9fc64 - std::panicking::default_hook::hdd59ab537dd27efb
                                 at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/panicking.rs:295:9
    10:        0x104ca0620 - std::panicking::rust_panic_with_hook::h533a16f5f89e4278
                                 at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/panicking.rs:801:13
    11:        0x104ca0270 - std::panicking::begin_panic_handler::{{closure}}::h168c3a4362c8e4df
                                 at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/panicking.rs:667:13
    12:        0x104c9f4f4 - std::sys::backtrace::__rust_end_short_backtrace::h601e3529ca2053df
                                 at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/sys/backtrace.rs:170:18
    13:        0x104c9ff50 - rust_begin_unwind
                                 at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/panicking.rs:665:5
    14:        0x104cea920 - core::panicking::panic_fmt::ha0f8363f677e0181
                                 at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/core/src/panicking.rs:76:14
    15:        0x104cea990 - core::panicking::panic::hdb1c1abf01ff1978
                                 at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/core/src/panicking.rs:148:5
    16:        0x104cea8b8 - core::option::unwrap_failed::hb903c8fd63cd2e84
                                 at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/core/src/option.rs:2009:5
    17:        0x1043ff55c - i_slint_compiler::llr::lower_expression::ExpressionLoweringCtx::map_property_reference::ha0a1abbd5a1ba5a4
    18:        0x10440107c - i_slint_compiler::llr::lower_expression::lower_assignment::hd5e5af7517480a44
    19:        0x1043ffc0c - i_slint_compiler::llr::lower_expression::lower_expression::h255c63b82409849b
    20:        0x1041adad8 - i_slint_compiler::llr::lower_expression::lower_expression::{{closure}}::h93d548e2b8be4c57
    21:        0x1045794e4 - core::iter::adapters::map::map_fold::{{closure}}::h7092264b89af57df
    22:        0x104596a3c - <core::slice::iter::Iter<T> as core::iter::traits::iterator::Iterator>::fold::h6bacfbbba4fc2683
    23:        0x104565a2c - <core::iter::adapters::map::Map<I,F> as core::iter::traits::iterator::Iterator>::fold::h6a773ad3193b550e
    24:        0x104572748 - core::iter::traits::iterator::Iterator::for_each::ha2658d089eab44f8
    25:        0x104337090 - alloc::vec::Vec<T,A>::extend_trusted::h9d7d7042cce7762c
    26:        0x10435488c - <alloc::vec::Vec<T,A> as alloc::vec::spec_extend::SpecExtend<T,I>>::spec_extend::hcb2e946fd16332dd
    27:        0x10432f05c - <alloc::vec::Vec<T> as alloc::vec::spec_from_iter_nested::SpecFromIterNested<T,I>>::from_iter::hf1207e5eea977c69
    28:        0x104354e90 - <alloc::vec::Vec<T> as alloc::vec::spec_from_iter::SpecFromIter<T,I>>::from_iter::h4c20c98e29eaab6b
    29:        0x1043518e4 - <alloc::vec::Vec<T> as core::iter::traits::collect::FromIterator<T>>::from_iter::h0d0e52e15d8189ef
    30:        0x1045707a8 - core::iter::traits::iterator::Iterator::collect::h7f7069a46f5f191b
    31:        0x1043ffb74 - i_slint_compiler::llr::lower_expression::lower_expression::h255c63b82409849b
    32:        0x10411dc34 - i_slint_compiler::llr::lower_to_item_tree::lower_global_expressions::h144529fb5559b494
    33:        0x1041179ec - i_slint_compiler::llr::lower_to_item_tree::lower_to_item_tree::h7caa655272519d80
    34:        0x104152594 - i_slint_compiler::generator::rust::generate::h8700becf935058d1
    35:        0x1040af474 - slint_build::compile_with_output_path::h9344a8c4a70e197b
    36:        0x1040aebc8 - slint_build::compile_with_config::ha87d9ae28acae24f
    37:        0x1040b00fc - slint_build::compile::h7008e743f7015ec0
    38:        0x1040d6b50 - build_script_build::main::hcea8566e7652a494
    39:        0x1040d41e4 - core::ops::function::FnOnce::call_once::hd0d4b6f48fbf72ca
    40:        0x1040e4b6c - std::sys::backtrace::__rust_begin_short_backtrace::hdb1ca354d9d7d483
    41:        0x1040dce24 - std::rt::lang_start::{{closure}}::h7d2054343e0db19c
    42:        0x104c97434 - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::h63129b5cef82c653
                                 at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/core/src/ops/function.rs:284:13
    43:        0x104c97434 - std::panicking::try::do_call::hc75001ce68de17ce
                                 at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/panicking.rs:557:40
    44:        0x104c97434 - std::panicking::try::hca490467fa33fe9e
                                 at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/panicking.rs:520:19
    45:        0x104c97434 - std::panic::catch_unwind::h4c361f6b6fc783c6
                                 at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/panic.rs:358:14
    46:        0x104c97434 - std::rt::lang_start_internal::{{closure}}::hac41dc746758e783
                                 at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/rt.rs:174:48
    47:        0x104c97434 - std::panicking::try::do_call::he06680f322313e18
                                 at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/panicking.rs:557:40
    48:        0x104c97434 - std::panicking::try::hcd65dba861b49988
                                 at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/panicking.rs:520:19
    49:        0x104c97434 - std::panic::catch_unwind::hbcff3448fe7d00ed
                                 at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/panic.rs:358:14
    50:        0x104c97434 - std::rt::lang_start_internal::hacda2dedffd2edb4
                                 at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/rt.rs:174:20
    51:        0x1040dcdfc - std::rt::lang_start::hf9755f77d8747486
    52:        0x1040d6bf8 - _main

Reproducible Code (if applicable)

Environment Details

• Slint Version:
• Platform/OS:
• Programming Language:
• Backend/Renderer:

Product Impact

No response

[ogoffart]

I'm going to seen more info.
It seems to be a crash when building the slint-lsp. But the slint-lsp builds fine (it is build in CI).
I guess this is some branch.
But i'd need a testcase to reproduce.

[szecket]

ok, it is a branch yes,
hunger/tobias/push-qvxpvxwosslm

into this branch I tried to add a

changed property.information => {
  self.viewport.y = 0;
}

to the scrollview in property-view.slint

[ogoffart]

The branch no longer exist, so i cannot investigate.
Since it is the same compiler error as in #7784 and it also involve change callback, i'll just assume this is duplicate of 7784 which i can reproduce so i'm going to close this one.