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fix: Clean error when attemping to return a slice from Brillig to ACIR #4280
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Co-authored-by: Tom French <15848336+TomAFrench@users.noreply.github.com>
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Diagnostic::simple_error( | ||
primary_message, | ||
"If attempting to return a `Vec` type, `Vec` contains a slice internally.".to_string(), |
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I'm not a fan of these hyper-specific taglines which might not apply to the actual cause of the error from the user. If we're not specifically checking for Vec, we shouldn't mention it in the error message imo. Otherwise it makes the message sound more confusing / imprecise.
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Yeah that is a fair point. I tried to mitigate with the language "If attempting". I did it this way as this issues an error when we do codegen on the call which isn't super clear about the return type itself. I figured if a user wrote a struct with a slice in it they would know, but for Vec
they may be unsure as it is one of our stdlib types.
# Description ## Problem\* Resolves #4245 ## Summary\* This adds a type check for call expressions to check the arguments of a call to an unconstrained function from a constrained function. As we have two different runtime environments this makes type checking a bit more complicated. As a followup to this PR we could try and catch the error added here (#4280) sooner. However, if the unconstrained function uses generics we must still fall back to the "type check" in SSA/ACIR gen from PR #4280. This PR now errors for the snippet in issue with the below using `nargo check`: <img width="900" alt="Screenshot 2024-02-06 at 3 36 27 PM" src="https://github.com/noir-lang/noir/assets/43554004/6c037458-3182-4ea4-8470-050a1734b875"> ## Additional Context ## Documentation\* Check one: - [ ] No documentation needed. - [ ] Documentation included in this PR. - [ ] **[Exceptional Case]** Documentation to be submitted in a separate PR. # PR Checklist\* - [ ] I have tested the changes locally. - [ ] I have formatted the changes with [Prettier](https://prettier.io/) and/or `cargo fmt` on default settings.
# Description ## Problem\* Resolves <!-- Link to GitHub Issue --> Followup to #4280 which added a Brillig call check in SSA and #4281 which type checks the arguments to an unconstrained call. ## Summary\* #4280 added a type check that is only caught during SSA as it was simpler for comparing the runtimes of function as well as encompassing any use of generics for an unconstrained function definition. However, we can still catch the error earlier in type check. I also removed the specific tag-line as mentioned in this [comment](#4280 (comment)). However, as `Vec` is the only non-obvious place a slice may be used I think the specific tag-line is ok in this case. ## Additional Context ## Documentation\* Check one: - [ ] No documentation needed. - [ ] Documentation included in this PR. - [ ] **[Exceptional Case]** Documentation to be submitted in a separate PR. # PR Checklist\* - [ ] I have tested the changes locally. - [ ] I have formatted the changes with [Prettier](https://prettier.io/) and/or `cargo fmt` on default settings.
🤖 I have created a release *beep* *boop* --- <details><summary>0.24.0</summary> ## [0.24.0](v0.23.0...v0.24.0) (2024-02-12) ### ⚠ BREAKING CHANGES * rename bigint_neg into bigint_sub (AztecProtocol/aztec-packages#4420) * Add expression width into acir (AztecProtocol/aztec-packages#4014) * init storage macro (AztecProtocol/aztec-packages#4200) * **acir:** Move `is_recursive` flag to be part of the circuit definition (AztecProtocol/aztec-packages#4221) * Sync commits from `aztec-packages` ([#4144](#4144)) ### Features * Add bit size to const opcode (AztecProtocol/aztec-packages#4385) ([158c8ce](158c8ce)) * Add brillig array index check ([#4127](#4127)) ([c29f85f](c29f85f)) * Add definitions for From and Into traits to Noir prelude ([#4169](#4169)) ([4421ce4](4421ce4)) * Add expression width into acir (AztecProtocol/aztec-packages#4014) ([158c8ce](158c8ce)) * Add instrumentation for tracking variables in debugging ([#4122](#4122)) ([c58d691](c58d691)) * Add option to print monomorphized program ([#4119](#4119)) ([80f7e29](80f7e29)) * Add support for overriding expression width ([#4117](#4117)) ([c8026d5](c8026d5)) * Add warnings for usage of restricted bit sizes ([#4234](#4234)) ([0ffc38b](0ffc38b)) * Allow bitshifts to be represented in SSA for brillig ([#4301](#4301)) ([d86ff1a](d86ff1a)) * Allow brillig to read arrays directly from memory (AztecProtocol/aztec-packages#4460) ([158c8ce](158c8ce)) * Allow globals to refer to any expression ([#4293](#4293)) ([479330e](479330e)) * Allow nested arrays and vectors in Brillig foreign calls (AztecProtocol/aztec-packages#4478) ([158c8ce](158c8ce)) * Allow variables and stack trace inspection in the debugger ([#4184](#4184)) ([bf263fc](bf263fc)) * **avm:** Back in avm context with macro - refactor context (AztecProtocol/aztec-packages#4438) ([158c8ce](158c8ce)) * **aztec-nr:** Initial work for aztec public vm macro (AztecProtocol/aztec-packages#4400) ([158c8ce](158c8ce)) * Deallocate stack items at the instruction level ([#4339](#4339)) ([8f024a8](8f024a8)) * Disable constraint bubbling pass ([#4131](#4131)) ([9ba2de6](9ba2de6)) * Disable unused variable checks on low-level and oracle functions ([#4179](#4179)) ([8f70e57](8f70e57)) * Evaluation of dynamic assert messages ([#4101](#4101)) ([c284e01](c284e01)) * Improve Error Handling for Cargo in Bootstrap Script ([#4211](#4211)) ([3a90849](3a90849)) * Init storage macro (AztecProtocol/aztec-packages#4200) ([158c8ce](158c8ce)) * **lsp:** Goto type reference for Struct ([#4091](#4091)) ([d56cac2](d56cac2)) * Move bounded_vec into the noir stdlib ([#4197](#4197)) ([c50621f](c50621f)) * Multiply first to allow more ACIR gen optimizations ([#4201](#4201)) ([882639d](882639d)) * Option expect method ([#4219](#4219)) ([8e042f2](8e042f2)) * Perform constraints on uncasted values if they are the same type ([#4303](#4303)) ([816fa85](816fa85)) * Remove predicate from `sort` intrinsic function ([#4228](#4228)) ([d646243](d646243)) * Remove replacement of boolean range opcodes with `AssertZero` opcodes ([#4107](#4107)) ([dac0e87](dac0e87)) * Replace bitwise ANDs used for truncation with `Instruction::Truncate` ([#4327](#4327)) ([eb67ff6](eb67ff6)) * Replace modulo operations with truncations where possible ([#4329](#4329)) ([70f2435](70f2435)) * Separate compilation and expression narrowing in `nargo` interface ([#4100](#4100)) ([62a4e37](62a4e37)) * Simplify all unsigned constant NOT instructions ([#4230](#4230)) ([fab4a6e](fab4a6e)) * Sync commits from `aztec-packages` ([#4144](#4144)) ([0205d3b](0205d3b)) * Use constraint information to perform constant folding ([#4060](#4060)) ([9a4bf16](9a4bf16)) ### Bug Fixes * Accurate tracking of slice capacities across blocks ([#4240](#4240)) ([7420dbb](7420dbb)) * Allow function calls in global definitions ([#4320](#4320)) ([0dc205c](0dc205c)) * Allow performing bitwise NOT on unsigned integers ([#4229](#4229)) ([b3ddf10](b3ddf10)) * Apply generic arguments from trait constraints before instantiating identifiers ([#4121](#4121)) ([eb6fc0f](eb6fc0f)) * Apply range constraints to return values from unconstrained functions ([#4217](#4217)) ([3af2a89](3af2a89)) * Apply trait constraints from method calls ([#4152](#4152)) ([68c5486](68c5486)) * Better errors for missing `fn` keyword ([#4154](#4154)) ([057c208](057c208)) * Check for tests in all packages before failing due to an unsatisfied test filter ([#4114](#4114)) ([1107373](1107373)) * Clean error when attemping to return a slice from Brillig to ACIR ([#4280](#4280)) ([bcad4ec](bcad4ec)) * Correct result when assigning shared arrays in unconstrained code ([#4210](#4210)) ([bdd8a96](bdd8a96)) * **docs:** Codegen docs before cutting a new version ([#4183](#4183)) ([2914310](2914310)) * Ensure that destination register is allocated when moving between registers in brillig gen ([#4316](#4316)) ([ca0a56e](ca0a56e)) * Ensure that unconstrained entrypoint functions don't generate constraints ([#4292](#4292)) ([fae4ead](fae4ead)) * From field with constant values ([#4226](#4226)) ([593916b](593916b)) * **lsp:** Crash when file not in workspace ([#4146](#4146)) ([cf7130f](cf7130f)) * **lsp:** Replace panics with errors ([#4209](#4209)) ([26e9618](26e9618)) * Maintain correct type when simplifying `x ^ x` ([#4082](#4082)) ([9d83c2b](9d83c2b)) * Message formatting for assert statement ([#4323](#4323)) ([3972ead](3972ead)) * Prevent debugger crashing on circuits with no opcodes ([#4283](#4283)) ([2e32845](2e32845)) * Prevent declarations of blackbox functions outside of the stdlib ([#4177](#4177)) ([9fb6b09](9fb6b09)) * Remove panic from `init_log_level` in `acvm_js` ([#4195](#4195)) ([2e26530](2e26530)) * Respect order in bubble up for redundant asserts ([#4109](#4109)) ([189aa48](189aa48)) * Revert "correct result when assigning shared arrays" and added regression test ([#4333](#4333)) ([05e78b3](05e78b3)) * Save the data bus to the current function before generating others ([#4047](#4047)) ([0a5bd4f](0a5bd4f)) * Simplify constant assert messages into `ConstrainError::Static` ([#4287](#4287)) ([fd15052](fd15052)) * Ssa typing for array & slice indexes ([#4278](#4278)) ([4074bab](4074bab)) * Ssa typing for assign_lvalue_index ([#4289](#4289)) ([37f149c](37f149c)) * SSA typing for right shifts ([#4302](#4302)) ([41ee1aa](41ee1aa)) * Ssa typing of make_offset ([#4277](#4277)) ([e4378ee](e4378ee)) * Track graphs of item dependencies to find dependency cycles ([#4266](#4266)) ([61eabf1](61eabf1)) * Type check ACIR mutable reference passed to brillig ([#4281](#4281)) ([7e139de](7e139de)) * Update array method type signatures in the docs ([#4178](#4178)) ([7c0a955](7c0a955)) * Zero out input to `to_radix` calls if inactive ([#4116](#4116)) ([3f5bad3](3f5bad3)) ### Miscellaneous Chores * **acir:** Move `is_recursive` flag to be part of the circuit definition (AztecProtocol/aztec-packages#4221) ([158c8ce](158c8ce)) * Rename bigint_neg into bigint_sub (AztecProtocol/aztec-packages#4420) ([158c8ce](158c8ce)) </details> <details><summary>0.40.0</summary> ## [0.40.0](v0.39.0...v0.40.0) (2024-02-12) ### ⚠ BREAKING CHANGES * rename bigint_neg into bigint_sub (AztecProtocol/aztec-packages#4420) * Add expression width into acir (AztecProtocol/aztec-packages#4014) * init storage macro (AztecProtocol/aztec-packages#4200) * **acir:** Move `is_recursive` flag to be part of the circuit definition (AztecProtocol/aztec-packages#4221) * Sync commits from `aztec-packages` ([#4144](#4144)) * Breaking changes from aztec-packages ([#3955](#3955)) * Rename Arithmetic opcode to AssertZero ([#3840](#3840)) * Remove unused methods on ACIR opcodes ([#3841](#3841)) * Remove partial backend feature ([#3805](#3805)) ### Features * Add bit size to const opcode (AztecProtocol/aztec-packages#4385) ([158c8ce](158c8ce)) * Add expression width into acir (AztecProtocol/aztec-packages#4014) ([158c8ce](158c8ce)) * Add instrumentation for tracking variables in debugging ([#4122](#4122)) ([c58d691](c58d691)) * Add support for overriding expression width ([#4117](#4117)) ([c8026d5](c8026d5)) * Allow brillig to read arrays directly from memory (AztecProtocol/aztec-packages#4460) ([158c8ce](158c8ce)) * Allow nested arrays and vectors in Brillig foreign calls (AztecProtocol/aztec-packages#4478) ([158c8ce](158c8ce)) * Allow variables and stack trace inspection in the debugger ([#4184](#4184)) ([bf263fc](bf263fc)) * **avm:** Back in avm context with macro - refactor context (AztecProtocol/aztec-packages#4438) ([158c8ce](158c8ce)) * **aztec-nr:** Initial work for aztec public vm macro (AztecProtocol/aztec-packages#4400) ([158c8ce](158c8ce)) * Aztec-packages ([#3754](#3754)) ([c043265](c043265)) * Breaking changes from aztec-packages ([#3955](#3955)) ([5be049e](5be049e)) * Evaluation of dynamic assert messages ([#4101](#4101)) ([c284e01](c284e01)) * Init storage macro (AztecProtocol/aztec-packages#4200) ([158c8ce](158c8ce)) * Remove range constraints from witnesses which are constrained to be constants ([#3928](#3928)) ([afe9c7a](afe9c7a)) * Remove replacement of boolean range opcodes with `AssertZero` opcodes ([#4107](#4107)) ([dac0e87](dac0e87)) * Speed up transformation of debug messages ([#3815](#3815)) ([2a8af1e](2a8af1e)) * Sync `aztec-packages` ([#4011](#4011)) ([fee2452](fee2452)) * Sync commits from `aztec-packages` ([#4068](#4068)) ([7a8f3a3](7a8f3a3)) * Sync commits from `aztec-packages` ([#4144](#4144)) ([0205d3b](0205d3b)) ### Bug Fixes * Deserialize odd length hex literals ([#3747](#3747)) ([4000fb2](4000fb2)) * Remove panic from `init_log_level` in `acvm_js` ([#4195](#4195)) ([2e26530](2e26530)) * Return error rather instead of panicking on invalid circuit ([#3976](#3976)) ([67201bf](67201bf)) ### Miscellaneous Chores * **acir:** Move `is_recursive` flag to be part of the circuit definition (AztecProtocol/aztec-packages#4221) ([158c8ce](158c8ce)) * Remove partial backend feature ([#3805](#3805)) ([0383100](0383100)) * Remove unused methods on ACIR opcodes ([#3841](#3841)) ([9e5d0e8](9e5d0e8)) * Rename Arithmetic opcode to AssertZero ([#3840](#3840)) ([836f171](836f171)) * Rename bigint_neg into bigint_sub (AztecProtocol/aztec-packages#4420) ([158c8ce](158c8ce)) </details> --- This PR was generated with [Release Please](https://github.com/googleapis/release-please). See [documentation](https://github.com/googleapis/release-please#release-please).
Description
Problem*
Resolves #2535
Summary*
We currently panic when attempting to return a slice from an unconstrained runtime to an ACIR runtime. In some cases such as in the linked issue the panic is not very clear at all.
New error:
Additional Context
Documentation*
Check one:
PR Checklist*
cargo fmt
on default settings.