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Incorrect compiler's suggestion on a #[derive(Deserialize)]
on struct with an Option
's field and custom deserialize_with
#106720
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A-diagnostics
Area: Messages for errors, warnings, and lints
T-compiler
Relevant to the compiler team, which will review and decide on the PR/issue.
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woshilapin
added
A-diagnostics
Area: Messages for errors, warnings, and lints
T-compiler
Relevant to the compiler team, which will review and decide on the PR/issue.
labels
Jan 11, 2023
@rustbot claim The current suggestion is comically bad 😆. |
@estebank This was pretty low on my todo list so that's all fine. |
estebank
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Mar 15, 2023
Hide invalid proc-macro suggestions and track spans coming from proc-macros pointing at attribute. Effectively, unless the proc-macro keeps user spans, suggestions will not be produced for the code they produce. Account for desugaring when checking if a span can be used for suggestions Fix rust-lang#106720.
matthiaskrgr
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Mar 16, 2023
Do not provide suggestions when the spans come from expanded code that doesn't point at user code Hide invalid proc-macro suggestions and track spans coming from proc-macros pointing at attribute. Effectively, unless the proc-macro keeps user spans, suggestions will not be produced for the code they produce. r? `@ghost` Fix rust-lang#107113, fix rust-lang#107976, fix rust-lang#107977, fix rust-lang#108748, fix rust-lang#106720, fix rust-lang#90557. Could potentially address rust-lang#50141, rust-lang#67373, rust-lang#55146, rust-lang#78862, rust-lang#74043, rust-lang#88514, rust-lang#83320, rust-lang#91520, rust-lang#104071. CC rust-lang#50122, rust-lang#76360.
matthiaskrgr
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Mar 17, 2023
Do not provide suggestions when the spans come from expanded code that doesn't point at user code Hide invalid proc-macro suggestions and track spans coming from proc-macros pointing at attribute. Effectively, unless the proc-macro keeps user spans, suggestions will not be produced for the code they produce. r? ``@ghost`` Fix rust-lang#107113, fix rust-lang#107976, fix rust-lang#107977, fix rust-lang#108748, fix rust-lang#106720, fix rust-lang#90557. Could potentially address rust-lang#50141, rust-lang#67373, rust-lang#55146, rust-lang#78862, rust-lang#74043, rust-lang#88514, rust-lang#83320, rust-lang#91520, rust-lang#104071. CC rust-lang#50122, rust-lang#76360.
estebank
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Apr 26, 2023
Hide invalid proc-macro suggestions and track spans coming from proc-macros pointing at attribute. Effectively, unless the proc-macro keeps user spans, suggestions will not be produced for the code they produce. Account for desugaring when checking if a span can be used for suggestions Fix rust-lang#106720.
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Labels
A-diagnostics
Area: Messages for errors, warnings, and lints
T-compiler
Relevant to the compiler team, which will review and decide on the PR/issue.
Given the following code (playground):
The current output is:
Ideally the output should look like (not sure of my proposition, but at least, the second part needs to change):
The compiler correctly identifies the code as incorrect, since the function used in
deserialize_with
returns abool
instead of anOption<bool>
. However, the suggestion of the compiler seems off.Discussion about this diagnostic problem has been started on URLO (see this thread).
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