prisma format panic due to non-UTF8 characters in comments.

[jkomyno]

Command: prisma format
Version: 4.3.1
Binary Version: c875e43600dfe042452e0b868f7a48b817b9640b
Report: https://prisma-errors.netlify.app/report/14385
OS: x64 darwin 21.6.0

Rust Stacktrace:

RuntimeError: unreachable
    at __rust_start_panic (<anonymous>:wasm-function[3967]:0x1f6d33)
    at rust_panic (<anonymous>:wasm-function[3214]:0x1f35d2)
    at std::panicking::rust_panic_with_hook::h84feca33bd4bd229 (<anonymous>:wasm-function[2199]:0x1d8c3a)
    at std::panicking::begin_panic_handler::{{closure}}::hd2eacd3bb9ff1eab (<anonymous>:wasm-function[2399]:0x1e16b9)
    at std::sys_common::backtrace::__rust_end_short_backtrace::h976699518d897fb1 (<anonymous>:wasm-function[3499]:0x1f5692)
    at rust_begin_unwind (<anonymous>:wasm-function[3068]:0x1f1976)
    at core::panicking::panic_fmt::hc171d095bc4a492d (<anonymous>:wasm-function[3083]:0x1f1ce6)
    at core::str::slice_error_fail_rt::hcb3b0ba086da6bd9 (<anonymous>:wasm-function[351]:0xfe377)
    at core::ops::function::FnOnce::call_once::ha875dc1ee2d6d5c2 (<anonymous>:wasm-function[3590]:0x1f5d14)
    at core::intrinsics::const_eval_select::h931998c74f012b97 (<anonymous>:wasm-function[3402]:0x1f4e50)

[jkomyno]

As it turns out:

• viewing the schema from this error report in VSCode reveals a bunch of warnings, especially about missing @unique attributes
• format crashes because of the comments in a non-latin alphabet. Removing the Thai comments allows us to run prisma format, which results in the following managed error:

Prisma schema loaded from prisma/schema.prisma
Error: Schema validation error - Error (query-engine-node-api library)
Error code: P1012
error: Error validating model "QrPayment": Ambiguous relation detected. The fields `payment` and `Payment` in model `QrPayment` both refer to `Payment`. Please provide different relation names for them by adding `@relation(<name>).
  -->  schema.prisma:166
   | 
165 |   loanId          String
166 |   payment         Payment?       @relation(fields: [paymentId], references: [id])
167 |   bblVerifyLogs   BblVerifyLog[] @relation("QrPaymentBblVerifyLog")
   | 

Validation Error Count: 1
[Context: getDmmf]

Prisma CLI Version : 4.5.0

[jkomyno]

I think we should stop panicking when running prisma format targeting a Prisma schema with non-UTF8 characters.
It seems we're able to properly attach warning spans in these kind of schema, but formatting just crashes hard as of v4.5.0.

[tomhoule]

Closing this as duplicate of #14895

See the comments and the linked PR: it's not about all comments, but only the path where we have a missing @relation attribute on a forward relation field. We have a bad newline-checking function there. It's part of the logic that adds fields and attributes during reformatting. Comments with multi-byte UTF-8 other than trailing comments in this particular case where we add an @relation all work.