Rollup merge of #119660 - RalfJung:const-ub-enum, r=oli-obk
remove an unnecessary stderr-per-bitwidth also update some regexp, `a(lloc)?` would no longer match now that we have compiletest itself do alloc ID normalization. r? ````@oli-obk````
This commit is contained in:
Matthias Krüger
GitHub
commit
34771e2f9a
@ -1,134 +0,0 @@
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error[E0080]: it is undefined behavior to use this value
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--> $DIR/ub-enum.rs:27:1
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LL | const BAD_ENUM: Enum = unsafe { mem::transmute(1usize) };
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| ^^^^^^^^^^^^^^^^^^^^ constructing invalid value at .<enum-tag>: encountered 0x0000000000000001, but expected a valid enum tag
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= note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
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= note: the raw bytes of the constant (size: $SIZE, align: $ALIGN) {
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HEX_DUMP
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}
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error[E0080]: evaluation of constant value failed
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--> $DIR/ub-enum.rs:30:1
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LL | const BAD_ENUM_PTR: Enum = unsafe { mem::transmute(&1) };
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| ^^^^^^^^^^^^^^^^^^^^^^^^ unable to turn pointer into integer
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= help: this code performed an operation that depends on the underlying bytes representing a pointer
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= help: the absolute address of a pointer is not known at compile-time, so such operations are not supported
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error[E0080]: evaluation of constant value failed
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--> $DIR/ub-enum.rs:33:1
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LL | const BAD_ENUM_WRAPPED: Wrap<Enum> = unsafe { mem::transmute(&1) };
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unable to turn pointer into integer
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= help: this code performed an operation that depends on the underlying bytes representing a pointer
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= help: the absolute address of a pointer is not known at compile-time, so such operations are not supported
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error[E0080]: it is undefined behavior to use this value
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--> $DIR/ub-enum.rs:45:1
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LL | const BAD_ENUM2: Enum2 = unsafe { mem::transmute(0usize) };
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| ^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value at .<enum-tag>: encountered 0x0000000000000000, but expected a valid enum tag
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= note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
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= note: the raw bytes of the constant (size: $SIZE, align: $ALIGN) {
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HEX_DUMP
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}
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error[E0080]: evaluation of constant value failed
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--> $DIR/ub-enum.rs:47:1
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LL | const BAD_ENUM2_PTR: Enum2 = unsafe { mem::transmute(&0) };
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^ unable to turn pointer into integer
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= help: this code performed an operation that depends on the underlying bytes representing a pointer
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= help: the absolute address of a pointer is not known at compile-time, so such operations are not supported
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error[E0080]: evaluation of constant value failed
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--> $DIR/ub-enum.rs:50:1
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LL | const BAD_ENUM2_WRAPPED: Wrap<Enum2> = unsafe { mem::transmute(&0) };
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unable to turn pointer into integer
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= help: this code performed an operation that depends on the underlying bytes representing a pointer
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= help: the absolute address of a pointer is not known at compile-time, so such operations are not supported
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error[E0080]: evaluation of constant value failed
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--> $DIR/ub-enum.rs:59:42
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LL | const BAD_ENUM2_UNDEF : Enum2 = unsafe { MaybeUninit { uninit: () }.init };
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ using uninitialized data, but this operation requires initialized memory
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error[E0080]: evaluation of constant value failed
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--> $DIR/ub-enum.rs:64:1
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LL | const BAD_ENUM2_OPTION_PTR: Option<Enum2> = unsafe { mem::transmute(&0) };
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unable to turn pointer into integer
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= help: this code performed an operation that depends on the underlying bytes representing a pointer
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= help: the absolute address of a pointer is not known at compile-time, so such operations are not supported
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error[E0080]: it is undefined behavior to use this value
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--> $DIR/ub-enum.rs:81:1
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LL | const BAD_UNINHABITED_VARIANT1: UninhDiscriminant = unsafe { mem::transmute(1u8) };
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value at .<enum-tag>: encountered an uninhabited enum variant
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= note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
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= note: the raw bytes of the constant (size: $SIZE, align: $ALIGN) {
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HEX_DUMP
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}
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error[E0080]: it is undefined behavior to use this value
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--> $DIR/ub-enum.rs:83:1
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LL | const BAD_UNINHABITED_VARIANT2: UninhDiscriminant = unsafe { mem::transmute(3u8) };
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value at .<enum-tag>: encountered an uninhabited enum variant
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= note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
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= note: the raw bytes of the constant (size: $SIZE, align: $ALIGN) {
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HEX_DUMP
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}
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error[E0080]: it is undefined behavior to use this value
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--> $DIR/ub-enum.rs:91:1
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LL | const BAD_OPTION_CHAR: Option<(char, char)> = Some(('x', unsafe { mem::transmute(!0u32) }));
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value at .<enum-variant(Some)>.0.1: encountered 0xffffffff, but expected a valid unicode scalar value (in `0..=0x10FFFF` but not in `0xD800..=0xDFFF`)
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= note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
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= note: the raw bytes of the constant (size: $SIZE, align: $ALIGN) {
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HEX_DUMP
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}
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error[E0080]: evaluation of constant value failed
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--> $DIR/ub-enum.rs:96:77
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LL | const BAD_UNINHABITED_WITH_DATA1: Result<(i32, Never), (i32, !)> = unsafe { mem::transmute(0u64) };
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| ^^^^^^^^^^^^^^^^^^^^ constructing invalid value at .<enum-tag>: encountered an uninhabited enum variant
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error[E0080]: evaluation of constant value failed
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--> $DIR/ub-enum.rs:98:77
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LL | const BAD_UNINHABITED_WITH_DATA2: Result<(i32, !), (i32, Never)> = unsafe { mem::transmute(0u64) };
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| ^^^^^^^^^^^^^^^^^^^^ constructing invalid value at .<enum-tag>: encountered an uninhabited enum variant
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error[E0080]: evaluation of constant value failed
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--> $SRC_DIR/core/src/mem/mod.rs:LL:COL
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= note: read discriminant of an uninhabited enum variant
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note: inside `discriminant::<Never>`
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--> $SRC_DIR/core/src/mem/mod.rs:LL:COL
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note: inside `TEST_ICE_89765`
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--> $DIR/ub-enum.rs:103:14
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LL | unsafe { std::mem::discriminant(&*(&() as *const () as *const Never)); };
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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error: aborting due to 14 previous errors
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For more information about this error, try `rustc --explain E0080`.
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@ -1,7 +1,7 @@
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// stderr-per-bitwidth
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// Strip out raw byte dumps to make comparison platform-independent:
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// normalize-stderr-test "(the raw bytes of the constant) \(size: [0-9]*, align: [0-9]*\)" -> "$1 (size: $$SIZE, align: $$ALIGN)"
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// normalize-stderr-test "([0-9a-f][0-9a-f] |╾─*a(lloc)?[0-9]+(\+[a-z0-9]+)?─*╼ )+ *│.*" -> "HEX_DUMP"
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// normalize-stderr-test "([0-9a-f][0-9a-f] |╾─*ALLOC[0-9]+(\+[a-z0-9]+)?(<imm>)?─*╼ )+ *│.*" -> "HEX_DUMP"
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// normalize-stderr-test "0x0+" -> "0x0"
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#![feature(never_type)]
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#![allow(invalid_value)]
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@ -2,7 +2,7 @@ error[E0080]: it is undefined behavior to use this value
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--> $DIR/ub-enum.rs:27:1
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LL | const BAD_ENUM: Enum = unsafe { mem::transmute(1usize) };
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| ^^^^^^^^^^^^^^^^^^^^ constructing invalid value at .<enum-tag>: encountered 0x00000001, but expected a valid enum tag
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| ^^^^^^^^^^^^^^^^^^^^ constructing invalid value at .<enum-tag>: encountered 0x01, but expected a valid enum tag
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= note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
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= note: the raw bytes of the constant (size: $SIZE, align: $ALIGN) {
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@ -31,7 +31,7 @@ error[E0080]: it is undefined behavior to use this value
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--> $DIR/ub-enum.rs:45:1
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LL | const BAD_ENUM2: Enum2 = unsafe { mem::transmute(0usize) };
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| ^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value at .<enum-tag>: encountered 0x00000000, but expected a valid enum tag
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| ^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value at .<enum-tag>: encountered 0x0, but expected a valid enum tag
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= note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
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= note: the raw bytes of the constant (size: $SIZE, align: $ALIGN) {
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@ -1,6 +1,6 @@
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// Strip out raw byte dumps to make comparison platform-independent:
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// normalize-stderr-test "(the raw bytes of the constant) \(size: [0-9]*, align: [0-9]*\)" -> "$1 (size: $$SIZE, align: $$ALIGN)"
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// normalize-stderr-test "([0-9a-f][0-9a-f] |╾─*a(lloc)?[0-9]+(\+[a-z0-9]+)?─*╼ )+ *│.*" -> "HEX_DUMP"
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// normalize-stderr-test "([0-9a-f][0-9a-f] |╾─*ALLOC[0-9]+(\+[a-z0-9]+)?(<imm>)?─*╼ )+ *│.*" -> "HEX_DUMP"
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#![feature(core_intrinsics)]
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#![feature(never_type)]
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@ -1,6 +1,6 @@
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// Strip out raw byte dumps to make comparison platform-independent:
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// normalize-stderr-test "(the raw bytes of the constant) \(size: [0-9]*, align: [0-9]*\)" -> "$1 (size: $$SIZE, align: $$ALIGN)"
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// normalize-stderr-test "([0-9a-f][0-9a-f] |╾─*a(lloc)?[0-9]+(\+[a-z0-9]+)?─*╼ )+ *│.*" -> "HEX_DUMP"
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// normalize-stderr-test "([0-9a-f][0-9a-f] |╾─*ALLOC[0-9]+(\+[a-z0-9]+)?(<imm>)?─*╼ )+ *│.*" -> "HEX_DUMP"
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#![feature(never_type)]
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const _: &[!; 1] = unsafe { &*(1_usize as *const [!; 1]) }; //~ ERROR undefined behavior
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