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Matthias Krüger eb8114bad7
Rollup merge of #128277 - RalfJung:offset_from_wildcard, r=oli-obk 
miri: fix offset_from behavior on wildcard pointers

offset_from wouldn't behave correctly when the "end" pointer was a wildcard pointer (result of an int2ptr cast) just at the end of the allocation. Fix that by expressing the "same allocation" check in terms of two `check_ptr_access_signed` instead of something specific to offset_from, which is both more canonical and works better with wildcard pointers.

The second commit just improves diagnostics: I wanted the "pointer is dangling (has no provenance)" message to say how many bytes of memory it expected to see (since if it were 0 bytes, this would actually be legal, so it's good to tell the user that it's not 0 bytes). And then I was annoying that the error looks so different for when you deref a dangling pointer vs an out-of-bounds pointer so I made them more similar.

Fixes https://github.com/rust-lang/miri/issues/3767
2024-07-29 11:42:34 +02:00
..
abi
Use more accurate span for addr_of! suggestion
2024-07-18 18:39:20 +00:00
alloc-error
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allocator
…
annotate-snippet
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anon-params
More accurate span for anonymous argument suggestion
2024-07-18 00:19:27 +00:00
argfile
…
argument-suggestions
Revert suggestion verbosity change
2024-07-22 22:51:53 +00:00
array-slice-vec
stabilize is_sorted
2024-07-28 03:11:54 +08:00
asm
Rollup merge of #127853 - folkertdev:naked-function-error-messages, r=bjorn3
2024-07-28 08:57:16 +02:00
associated-consts
avoid creating an Instance only to immediately disassemble it again
2024-07-18 11:58:16 +02:00
associated-inherent-types
Improve the impl and diag output of lint type_alias_bounds
2024-07-23 01:48:03 +02:00
associated-item
…
associated-type-bounds
Improve the impl and diag output of lint type_alias_bounds
2024-07-23 01:48:03 +02:00
associated-types
Remove logic to suggest clone of function output
2024-07-26 13:56:06 -04:00
async-await
Rollup merge of #128228 - slanterns:const_waker, r=dtolnay,oli-obk
2024-07-28 20:07:46 +02:00
attributes
Auto merge of #127042 - GrigorenkoPV:derivative, r=compiler-errors
2024-07-25 22:50:58 +00:00
auto-traits
Don't ICE when auto trait has assoc ty in old solver
2024-07-24 17:19:44 -04:00
autoref-autoderef
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auxiliary
…
backtrace
fix interleaved panic output
2024-07-12 11:52:04 -04:00
bench
…
binding
…
binop
…
blind
Accurate use rename suggestion span
2024-07-18 00:00:04 +00:00
block-result
…
borrowck
Rollup merge of #128172 - compiler-errors:non-self-arg, r=chenyukang
2024-07-25 16:48:21 +02:00
box
…
btreemap
…
builtin-superkinds
…
c-variadic
Use ordinal number in argument error
2024-07-14 13:50:09 +09:00
cast
Use ordinal number in argument error
2024-07-14 13:50:09 +09:00
cfg
When finding item gated behind a cfg flat, point at it
2024-07-12 18:52:52 +00:00
check-cfg
Auto merge of #127755 - no1wudi:master, r=michaelwoerister
2024-07-23 09:45:28 +00:00
closure_context
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closure-expected-type
…
closures
Note closure captures when reporting deferred cast to fn ptr failed
2024-07-22 21:51:44 -04:00
cmse-nonsecure
improve error reporting
2024-07-18 14:32:10 +02:00
codegen
Add a bunch of tests for #107975
2024-07-19 23:27:42 +03:00
codemap_tests
Be more accurate about calculating display_col from a BytePos
2024-07-18 20:08:38 +00:00
coercion
…
coherence
Auto merge of #127042 - GrigorenkoPV:derivative, r=compiler-errors
2024-07-25 22:50:58 +00:00
coinduction
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command
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compare-method
show unit output when there is only output diff in diagnostics
2024-07-06 21:00:30 +08:00
compiletest-self-test
…
conditional-compilation
Make parse error suggestions verbose and fix spans
2024-07-12 03:02:57 +00:00
confuse-field-and-method
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const_prop
…
const-generics
Rollup merge of #126575 - fmease:update-lint-type_alias_bounds, r=compiler-errors
2024-07-26 02:20:28 -04:00
const-ptr
improve dangling/oob errors and make them more uniform
2024-07-27 21:12:54 +02:00
consts
improve dangling/oob errors and make them more uniform
2024-07-27 21:12:54 +02:00
coroutine
Explain that coroutine can be marked static
2024-07-21 22:32:29 -04:00
coverage-attr
Make parse error suggestions verbose and fix spans
2024-07-12 03:02:57 +00:00
crate-loading
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cross
…
cross-crate
…
custom_test_frameworks
…
cycle-trait
…
debuginfo
Always use a colon in //@ normalize-*: headers
2024-07-11 12:23:44 +10:00
definition-reachable
…
delegation
Delegation: support coercion for target expression
2024-07-16 18:03:15 +03:00
dep-graph
…
deployment-target
…
deprecation
…
deref-patterns
…
derived-errors
…
derives
…
deriving
Mark format! with must_use hint
2024-07-06 14:24:20 +02:00
dest-prop
…
destructuring-assignment
…
diagnostic_namespace
Allows #[diagnostic::do_not_recommend] to supress trait impls in suggestions as well
2024-07-11 08:14:28 +02:00
diagnostic-flags
…
diagnostic-width
…
did_you_mean
Make parse error suggestions verbose and fix spans
2024-07-12 03:02:57 +00:00
directory_ownership
…
disallowed-deconstructing
…
dollar-crate
…
drop
Use more accurate span for addr_of! suggestion
2024-07-18 18:39:20 +00:00
drop-bounds
…
dropck
Rewrite dropck
2024-07-02 02:30:38 +01:00
dst
…
duplicate
Accurate use rename suggestion span
2024-07-18 00:00:04 +00:00
dyn-drop
…
dyn-keyword
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dyn-star
…
dynamically-sized-types
…
editions
…
empty
More accurate suggestions when writing wrong style of enum variant literal
2024-07-18 18:20:35 +00:00
entry-point
…
enum
More accurate suggestions when writing wrong style of enum variant literal
2024-07-18 18:20:35 +00:00
enum-discriminant
…
env-macro
…
error-codes
improve dangling/oob errors and make them more uniform
2024-07-27 21:12:54 +02:00
error-emitter
…
errors
rewrite and rename issue-107094 to rmake
2024-07-22 10:12:00 -04:00
explicit
…
explicit-tail-calls
doc fixups from review
2024-07-07 18:16:38 +02:00
expr
More accurate suggestions when writing wrong style of enum variant literal
2024-07-18 18:20:35 +00:00
extern
Rollup merge of #125042 - long-long-float:suggest-move-arg-outside, r=fmease
2024-07-17 16:22:26 +02:00
extern-flag
…
feature-gates
stabilize is_sorted
2024-07-28 03:11:54 +08:00
ffi-attrs
…
fmt
Make parse error suggestions verbose and fix spans
2024-07-12 03:02:57 +00:00
fn
Rollup merge of #125042 - long-long-float:suggest-move-arg-outside, r=fmease
2024-07-17 16:22:26 +02:00
fn-main
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for
…
for-loop-while
…
foreign
…
fuel
…
fully-qualified-type
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function-pointer
…
functional-struct-update
…
functions-closures
…
generic-associated-types
Revert suggestion verbosity change
2024-07-22 22:51:53 +00:00
generic-const-items
Split part of adt_const_params into unsized_const_params
2024-07-17 11:01:29 +01:00
generics
Revert suggestion verbosity change
2024-07-22 22:51:53 +00:00
half-open-range-patterns
Make parse error suggestions verbose and fix spans
2024-07-12 03:02:57 +00:00
hashmap
…
hello_world
…
higher-ranked
Auto merge of #127042 - GrigorenkoPV:derivative, r=compiler-errors
2024-07-25 22:50:58 +00:00
hygiene
Always use a colon in //@ normalize-*: headers
2024-07-11 12:23:44 +10:00
illegal-sized-bound
…
impl-header-lifetime-elision
…
impl-trait
Rollup merge of #127054 - compiler-errors:bound-ordering, r=fmease
2024-07-25 04:43:18 +02:00
implied-bounds
Auto merge of #127435 - GrigorenkoPV:tests-for-112905, r=cjgillot
2024-07-13 13:12:52 +00:00
imports
Do not use question as label
2024-07-24 21:03:27 +00:00
include-macros
…
incoherent-inherent-impls
…
indexing
…
inference
Split part of adt_const_params into unsized_const_params
2024-07-17 11:01:29 +01:00
infinite
…
inherent-impls-overlap-check
…
inline-const
avoid creating an Instance only to immediately disassemble it again
2024-07-18 11:58:16 +02:00
instrument-coverage
…
instrument-xray
…
interior-mutability
…
internal
…
internal-lints
…
intrinsics
Always use a colon in //@ normalize-*: headers
2024-07-11 12:23:44 +10:00
invalid
…
invalid-compile-flags
…
invalid-module-declaration
…
invalid-self-argument
…
io-checks
Always use a colon in //@ normalize-*: headers
2024-07-11 12:23:44 +10:00
issues
Rollup merge of #127528 - estebank:ascii-control-chars, r=oli-obk
2024-07-25 04:43:19 +02:00
iterators
Gate the type length limit check behind a nightly flag
2024-07-12 21:16:09 -04:00
json
…
keyword
Do not use question as label
2024-07-24 21:03:27 +00:00
kindck
…
label
Make parse error suggestions verbose and fix spans
2024-07-12 03:02:57 +00:00
lang-items
Let InstCombine remove Clone shims inside Clone shims
2024-07-25 15:14:42 -04:00
late-bound-lifetimes
Revert suggestion verbosity change
2024-07-22 22:51:53 +00:00
layout
Rollup merge of #126152 - RalfJung:size_of_val_raw, r=saethlin
2024-07-24 18:00:35 +02:00
lazy-type-alias
LTA: Diag: Detect bivariant ty params that are only used recursively
2024-07-19 18:53:40 +02:00
lazy-type-alias-impl-trait
…
let-else
Make ; suggestions inline
2024-07-12 03:22:32 +00:00
lexer
Be more accurate about calculating display_col from a BytePos
2024-07-18 20:08:38 +00:00
lifetimes
Revert suggestion verbosity change
2024-07-22 22:51:53 +00:00
limits
Always use a colon in //@ normalize-*: headers
2024-07-11 12:23:44 +10:00
linkage-attr
…
lint
Rollup merge of #127017 - mu001999-contrib:dead/enhance, r=pnkfelix
2024-07-26 02:20:29 -04:00
liveness
Better span for "make binding mutable" suggestion
2024-07-04 02:02:21 +00:00
loops
…
lowering
…
lto
Don't output test artifacts into working directory
2024-07-21 13:45:55 -04:00
lub-glb
…
macro_backtrace
…
macros
Make missing_fragment_specifier an error in edition 2024
2024-07-27 05:33:24 -04:00
malformed
Be more accurate about calculating display_col from a BytePos
2024-07-18 20:08:38 +00:00
manual
…
marker_trait_attr
…
match
Match ergonomics 2024: test type inference
2024-07-05 11:17:49 -04:00
meta
…
methods
Revert suggestion verbosity change
2024-07-22 22:51:53 +00:00
mir
Add test
2024-07-21 21:42:10 +08:00
mir-dataflow
…
mismatched_types
Rollup merge of #125042 - long-long-float:suggest-move-arg-outside, r=fmease
2024-07-17 16:22:26 +02:00
missing
…
missing_non_modrs_mod
…
missing-trait-bounds
…
modules
…
modules_and_files_visibility
…
moves
Rollup merge of #124599 - estebank:issue-41708, r=wesleywiser
2024-07-11 17:01:36 +02:00
mut
Better span for "make binding mutable" suggestion
2024-07-04 02:02:21 +00:00
namespace
…
native-library-link-flags
Always use a colon in //@ normalize-*: headers
2024-07-11 12:23:44 +10:00
never_type
…
nll
Explain that coroutine can be marked static
2024-07-21 22:32:29 -04:00
no_std
…
non_modrs_mods
…
non_modrs_mods_and_inline_mods
…
not-panic
…
numbers-arithmetic
…
numeric
Tweak "field not found" suggestion when giving struct literal for tuple struct type
2024-07-18 18:20:35 +00:00
object-lifetime
…
object-safety
Rollup merge of #126090 - compiler-errors:supertrait-assoc-ty-unsoundness, r=lcnr
2024-07-26 00:57:20 +02:00
obsolete-in-place
…
offset-of
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on-unimplemented
…
operator-recovery
Make parse error suggestions verbose and fix spans
2024-07-12 03:02:57 +00:00
or-patterns
Improve "covered_by_many" error
2024-07-24 08:46:52 +02:00
overloaded
…
packed
Always use a colon in //@ normalize-*: headers
2024-07-11 12:23:44 +10:00
panic-handler
Always use a colon in //@ normalize-*: headers
2024-07-11 12:23:44 +10:00
panic-runtime
…
panics
Always use a colon in //@ normalize-*: headers
2024-07-11 12:23:44 +10:00
parallel-rustc
…
parser
Rollup merge of #128229 - tdittr:unsafe-extern-abi-error, r=compiler-errors
2024-07-26 19:03:08 -04:00
patchable-function-entry
…
pattern
Improve "covered_by_many" error
2024-07-24 08:46:52 +02:00
pin-macro
…
polymorphization
Make sure that args are compatible in resolve_associated_item
2024-07-24 22:59:57 -04:00
precondition-checks
…
print_type_sizes
…
privacy
Rollup merge of #126575 - fmease:update-lint-type_alias_bounds, r=compiler-errors
2024-07-26 02:20:28 -04:00
proc-macro
Improve spans on evaluated cfg_attrs.
2024-07-24 21:03:52 +10:00
process
Always use a colon in //@ normalize-*: headers
2024-07-11 12:23:44 +10:00
process-termination
…
ptr_ops
…
pub
Rollup merge of #127656 - RalfJung:pub_use_of_private_extern_crate, r=petrochenkov
2024-07-18 18:10:15 +02:00
qualified
…
query-system
…
range
Make parse error suggestions verbose and fix spans
2024-07-12 03:02:57 +00:00
raw-ref-op
…
reachable
Explain why a given pattern is considered unreachable
2024-07-24 08:02:55 +02:00
recursion
Gate the type length limit check behind a nightly flag
2024-07-12 21:16:09 -04:00
recursion_limit
…
regions
…
repeat-expr
Account for let foo = expr; to suggest const foo: Ty = expr;
2024-07-11 20:39:24 +00:00
repr
Always use a colon in //@ normalize-*: headers
2024-07-11 12:23:44 +10:00
reserved
…
resolve
Rollup merge of #127557 - linyihai:issue-126694, r=compiler-errors
2024-07-26 02:20:30 -04:00
return
Use full expr span for return suggestion on type error/ambiguity
2024-06-30 23:11:54 -04:00
rfcs
Rollup merge of #127853 - folkertdev:naked-function-error-messages, r=bjorn3
2024-07-28 08:57:16 +02:00
rmeta
…
runtime
…
rust-2018
…
rust-2021
…
rust-2024
Rollup merge of #125889 - Nilstrieb:migrate-into-the-future, r=compiler-errors
2024-07-28 13:42:18 +02:00
rustc-env
…
rustdoc
Be more accurate about calculating display_col from a BytePos
2024-07-18 20:08:38 +00:00
sanitizer
CFI: Support provided methods on traits
2024-07-17 21:45:43 +00:00
self
Auto merge of #117967 - adetaylor:fix-lifetime-elision-bug, r=lcnr
2024-07-18 13:33:38 +00:00
sepcomp
…
shadowed
…
shell-argfiles
…
simd
Do not use question as label
2024-07-24 21:03:27 +00:00
single-use-lifetime
…
sized
remove unnecessary ignore-endian-big from stack-overflow-trait-infer test
2024-07-02 16:31:40 +02:00
span
Be more accurate about calculating display_col from a BytePos
2024-07-18 20:08:38 +00:00
specialization
Add ConstArgKind::Path and make ConstArg its own HIR node
2024-07-16 19:27:28 -07:00
stability-attribute
Migrate tests to use -Znext-solver
2024-06-30 17:08:45 +00:00
stable-mir-print
…
stack-protector
…
static
Rollup merge of #125834 - workingjubilee:weaken-thir-unsafeck-for-addr-of-static-mut, r=compiler-errors
2024-07-23 13:06:54 +02:00
statics
Auto merge of #127722 - BoxyUwU:new_adt_const_params_limitations, r=compiler-errors
2024-07-21 05:36:21 +00:00
stats
Add ConstArgKind::Path and make ConstArg its own HIR node
2024-07-16 19:27:28 -07:00
std
…
stdlib-unit-tests
…
str
Be more accurate about calculating display_col from a BytePos
2024-07-18 20:08:38 +00:00
structs
Revert suggestion verbosity change
2024-07-22 22:51:53 +00:00
structs-enums
…
suggestions
Fix a span error when parsing a wrong param of function.
2024-07-25 22:33:45 +08:00
svh
…
symbol-mangling-version
…
symbol-names
Split part of adt_const_params into unsized_const_params
2024-07-17 11:01:29 +01:00
sync
…
target-feature
rustc_target: fix UI tests for s390x
2024-07-17 07:55:22 +08:00
test-attrs
Update name of Windows abort constant to match platform documentation
2024-07-15 22:21:41 +00:00
thir-print
report pat no field error no recoverd struct variant
2024-07-11 00:18:47 +08:00
thread-local
…
threads-sendsync
…
tool-attributes
Fix diagnostic and add a test for it
2024-07-10 18:56:06 -04:00
track-diagnostics
Always use a colon in //@ normalize-*: headers
2024-07-11 12:23:44 +10:00
trait-bounds
Fix malformed suggestion for repeated maybe unsized bounds
2024-07-14 17:46:25 +05:30
traits
Auto merge of #121676 - Bryanskiy:polarity, r=petrochenkov
2024-07-26 20:14:16 +00:00
transmutability
Revert suggestion verbosity change
2024-07-22 22:51:53 +00:00
transmute
Always use a colon in //@ normalize-*: headers
2024-07-11 12:23:44 +10:00
treat-err-as-bug
Always use a colon in //@ normalize-*: headers
2024-07-11 12:23:44 +10:00
trivial-bounds
Improve the impl and diag output of lint type_alias_bounds
2024-07-23 01:48:03 +02:00
try-block
Use shorter span for float literal suggestion
2024-07-04 05:19:35 +00:00
try-trait
Start using #[diagnostic::do_not_recommend] in the standard library
2024-07-22 07:29:59 +02:00
tuple
Use ordinal number in argument error
2024-07-14 13:50:09 +09:00
type
Improve the impl and diag output of lint type_alias_bounds
2024-07-23 01:48:03 +02:00
type-alias
Suggest full trait ref (with placeholders) on unresolved assoc tys
2024-07-23 01:26:25 +02:00
type-alias-enum-variants
Revert suggestion verbosity change
2024-07-22 22:51:53 +00:00
type-alias-impl-trait
Do not assemble candidates for auto traits of opaque types in their defining scope
2024-07-24 16:00:48 +00:00
type-inference
…
typeck
Rollup merge of #127528 - estebank:ascii-control-chars, r=oli-obk
2024-07-25 04:43:19 +02:00
typeof
Account for let foo = expr; to suggest const foo: Ty = expr;
2024-07-11 20:39:24 +00:00
ufcs
Revert suggestion verbosity change
2024-07-22 22:51:53 +00:00
unboxed-closures
Revert suggestion verbosity change
2024-07-22 22:51:53 +00:00
underscore-imports
Do not use question as label
2024-07-24 21:03:27 +00:00
underscore-lifetime
…
uniform-paths
…
uninhabited
Explain why a given pattern is considered unreachable
2024-07-24 08:02:55 +02:00
union
…
unknown-unstable-lints
…
unop
…
unpretty
Always use a colon in //@ normalize-*: headers
2024-07-11 12:23:44 +10:00
unresolved
Do not use question as label
2024-07-24 21:03:27 +00:00
unsafe
Tweak raw-pointer field access and array indexing suggestions
2024-07-04 06:06:33 +00:00
unsized
Support ?Trait bounds in supertraits and dyn Trait under a feature gate
2024-07-25 20:53:33 +03:00
unsized-locals
…
unused-crate-deps
…
unwind-abis
…
use
…
variance
Remove logic to suggest clone of function output
2024-07-26 13:56:06 -04:00
variants
Accurate use rename suggestion span
2024-07-18 00:00:04 +00:00
version
…
warnings
…
wasm
…
wf
Revert "sort suggestions for object diagnostic"
2024-07-18 16:51:06 -04:00
where-clauses
…
while
…
windows-subsystem
rewrite test-harness to rmake
2024-07-02 11:37:59 -04:00
zero-sized
…
.gitattributes
…
alias-uninit-value.rs
…
allow-non-lint-warnings.rs
…
anonymous-higher-ranked-lifetime.rs
…
anonymous-higher-ranked-lifetime.stderr
…
artificial-block.rs
…
as-precedence.rs
…
assign-assign.rs
…
assign-imm-local-twice.rs
Better span for "make binding mutable" suggestion
2024-07-04 02:02:21 +00:00
assign-imm-local-twice.stderr
Better span for "make binding mutable" suggestion
2024-07-04 02:02:21 +00:00
assoc-lang-items.rs
…
assoc-lang-items.stderr
…
assoc-oddities-3.rs
…
associated-path-shl.rs
…
associated-path-shl.stderr
…
atomic-from-mut-not-available.rs
…
atomic-from-mut-not-available.stderr
…
attempted-access-non-fatal.rs
…
attempted-access-non-fatal.stderr
…
attr-bad-crate-attr.rs
…
attr-bad-crate-attr.stderr
…
attr-shebang.rs
…
attr-start.rs
…
attr-usage-inline.rs
…
attr-usage-inline.stderr
…
attrs-resolution-errors.rs
…
attrs-resolution-errors.stderr
…
attrs-resolution.rs
…
augmented-assignments-feature-gate-cross.rs
…
augmented-assignments-rpass.rs
…
augmented-assignments.rs
…
augmented-assignments.stderr
…
auto-instantiate.rs
…
auto-ref-slice-plus-ref.rs
…
auto-ref-slice-plus-ref.stderr
…
autoderef-full-lval.rs
…
autoderef-full-lval.stderr
…
bare-fn-implements-fn-mut.rs
…
bare-static-string.rs
…
big-literals.rs
…
bind-by-move.rs
…
bitwise.rs
…
bogus-tag.rs
…
bogus-tag.stderr
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borrow-by-val-method-receiver.rs
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bounds-lifetime.rs
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break-diverging-value.rs
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builtin-clone-unwind.rs
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can-copy-pod.rs
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cancel-clean-via-immediate-rvalue-ref.rs
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cannot-mutate-captured-non-mut-var.rs
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More accurate mutability suggestion
2024-07-04 05:36:34 +00:00
capture1.rs
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catch-unwind-bang.rs
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cenum_impl_drop_cast.rs
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char.rs
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class-cast-to-trait.rs
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class-method-missing.rs
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cleanup-shortcircuit.rs
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close-over-big-then-small-data.rs
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command-line-diagnostics.rs
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Better span for "make binding mutable" suggestion
2024-07-04 02:02:21 +00:00
complex.rs
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conservative_impl_trait.rs
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constructor-lifetime-args.rs
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Revert suggestion verbosity change
2024-07-22 22:51:53 +00:00
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crate-leading-sep.rs
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custom-test-frameworks-simple.rs
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deep.rs
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default-method-parsing.rs
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defaults-well-formedness.rs
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deprecation-in-force-unstable.rs
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deref-rc.rs
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double-ref.rs
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early-ret-binop-add.rs
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error-festival.rs
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fact.rs
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global-scope.rs
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hello.rs
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impl-inherent-non-conflict.rs
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invalid_crate_type_syntax.rs
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loud_ui.rs
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max-min-classes.rs
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maybe-bounds.rs
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Support ?Trait bounds in supertraits and dyn Trait under a feature gate
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method-output-diff-issue-127263.rs
show unit output when there is only output diff in diagnostics
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2024-07-14 13:50:09 +09:00
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README.md
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rustc-error.rs
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short-error-format.rs
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sized-borrowed-pointer.rs
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sized-cycle-note.rs
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sized-owned-pointer.rs
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stable-addr-of.rs
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Gate the type length limit check behind a nightly flag
2024-07-12 21:16:09 -04:00
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unsigned-literal-negation.rs
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README.md

UI Tests

This folder contains rustc's UI tests.

Test Directives (Headers)

Typically, a UI test will have some test directives / headers which are special comments that tell compiletest how to build and intepret a test.

As part of an on-going effort to rewrite compiletest (see https://github.com/rust-lang/compiler-team/issues/536), a major change proposal to change legacy compiletest-style headers // <directive> to ui_test-style headers //@ <directive> was accepted (see https://github.com/rust-lang/compiler-team/issues/512.

An example directive is ignore-test. In legacy compiletest style, the header would be written as

// ignore-test

but in ui_test style, the header would be written as

//@ ignore-test

compiletest is changed to accept only //@ directives for UI tests (currently), and will reject and report an error if it encounters any comments // <content> that may be parsed as an legacy compiletest-style test header. To fix this, you should migrate to the ui_test-style header //@ <content>.