Peek for panic message in test output

Cargo.toml

@@ -12,7 +12,7 @@ authors = ["rust-analyzer team"]
 [profile.dev]
 # Disabling debug info speeds up builds a bunch,
 # and we don't rely on it for debugging that much.
-debug = 1
+debug = 0
 
 [profile.dev.package]
 # These speed up local tests.

crates/hir-ty/src/mir/eval.rs

@@ -428,6 +428,17 @@ impl MirEvalError {
         }
         Ok(())
     }
+
+    pub fn is_panic(&self) -> Option<&str> {
+        let mut err = self;
+        while let MirEvalError::InFunction(e, _) = err {
+            err = e;
+        }
+        match err {
+            MirEvalError::Panic(msg) => Some(msg),
+            _ => None,
+        }
+    }
 }
 
 impl std::fmt::Debug for MirEvalError {

crates/hir-ty/src/mir/eval/shim.rs

@@ -360,7 +360,7 @@ impl Evaluator<'_> {
                             ))
                         };
                     }
-                    let size = self.size_of_sized(&ty, locals, "begin panic arg")?;
+                    let size = self.size_of_sized(ty, locals, "begin panic arg")?;
                     let pointee = arg.interval.get(self)?;
                     arg = IntervalAndTy {
                         interval: Interval::new(Address::from_bytes(pointee)?, size),

crates/hir-ty/src/mir/eval/tests.rs

@@ -73,6 +73,13 @@ fn check_pass_and_stdio(ra_fixture: &str, expected_stdout: &str, expected_stderr
     }
 }
 
+fn check_panic(ra_fixture: &str, expected_panic: &str) {
+    let (db, file_ids) = TestDB::with_many_files(ra_fixture);
+    let file_id = *file_ids.last().unwrap();
+    let e = eval_main(&db, file_id).unwrap_err();
+    assert_eq!(e.is_panic().unwrap_or_else(|| panic!("unexpected error: {:?}", e)), expected_panic);
+}
+
 #[test]
 fn function_with_extern_c_abi() {
     check_pass(
@@ -96,13 +103,14 @@ fn panic_fmt() {
     //   -> core::panicking::const_panic_fmt
     //     -> #[rustc_const_panic_str] core::panicking::panic_display (hooked by CTFE for builtin panic)
     //       -> Err(ConstEvalError::Panic)
-    check_pass(
+    check_panic(
         r#"
 //- minicore: fmt, panic
 fn main() {
     panic!("hello, world!");
 }
     "#,
+        "hello, world!",
     );
 }
 
@@ -112,7 +120,7 @@ fn panic_display() {
     // -> panic_2021 (builtin macro redirection)
     //   -> #[rustc_const_panic_str] core::panicking::panic_display (hooked by CTFE for builtin panic)
     //     -> Err(ConstEvalError::Panic)
-    check_pass(
+    check_panic(
         r#"
 //- minicore: fmt, panic
 
@@ -120,6 +128,7 @@ fn main() {
     panic!("{}", "hello, world!");
 }
     "#,
+        "hello, world!",
     );
 }
 

crates/ide-diagnostics/src/tests.rs

@@ -293,6 +293,7 @@ fn minicore_smoke_test() {
         // This should be ignored since we conditionally remove code which creates single item use with braces
         config.disabled.insert("unused_braces".to_owned());
         config.disabled.insert("unused_variables".to_owned());
+        config.disabled.insert("remove-unnecessary-else".to_owned());
         check_diagnostics_with_config(config, &source);
     }
 

crates/ide/src/hover/tests.rs

@@ -7864,8 +7864,8 @@ impl Iterator for S {
                                 file_id: FileId(
                                     1,
                                 ),
-                                full_range: 6290..6498,
+                                full_range: 7791..7999,
-                                focus_range: 6355..6361,
+                                focus_range: 7856..7862,
                                 name: "Future",
                                 kind: Trait,
                                 container_name: "future",
@@ -7878,8 +7878,8 @@ impl Iterator for S {
                                 file_id: FileId(
                                     1,
                                 ),
-                                full_range: 7128..7594,
+                                full_range: 8629..9095,
-                                focus_range: 7172..7180,
+                                focus_range: 8673..8681,
                                 name: "Iterator",
                                 kind: Trait,
                                 container_name: "iterator",

crates/ide/src/syntax_highlighting/test_data/highlight_default_library.html

@@ -49,5 +49,5 @@ pre                 { color: #DCDCCC; background: #3F3F3F; font-size: 22px; padd
 
 <span class="keyword">fn</span> <span class="function declaration">main</span><span class="parenthesis">(</span><span class="parenthesis">)</span> <span class="brace">{</span>
     <span class="keyword">let</span> <span class="variable declaration">foo</span> <span class="operator">=</span> <span class="enum_variant default_library library">Some</span><span class="parenthesis">(</span><span class="numeric_literal">92</span><span class="parenthesis">)</span><span class="semicolon">;</span>
-    <span class="keyword">let</span> <span class="variable declaration">nums</span> <span class="operator">=</span> <span class="module default_library library">iter</span><span class="operator">::</span><span class="function default_library library">repeat</span><span class="parenthesis">(</span><span class="variable">foo</span><span class="operator">.</span><span class="method consuming default_library library">unwrap</span><span class="parenthesis">(</span><span class="parenthesis">)</span><span class="parenthesis">)</span><span class="semicolon">;</span>
+    <span class="keyword">let</span> <span class="variable declaration">nums</span> <span class="operator">=</span> <span class="module default_library library">iter</span><span class="operator">::</span><span class="function default_library library">repeat</span><span class="parenthesis">(</span><span class="variable">foo</span><span class="operator">.</span><span class="method default_library library">unwrap</span><span class="parenthesis">(</span><span class="parenthesis">)</span><span class="parenthesis">)</span><span class="semicolon">;</span>
 <span class="brace">}</span></code></pre>

crates/ide/src/syntax_highlighting/test_data/highlight_strings.html

@@ -158,9 +158,9 @@ pre                 { color: #DCDCCC; background: #3F3F3F; font-size: 22px; padd
     <span class="macro">println</span><span class="macro_bang">!</span><span class="parenthesis macro">(</span><span class="string_literal macro">"</span><span class="format_specifier">{</span><span class="variable">ничоси</span><span class="format_specifier">}</span><span class="string_literal macro">"</span><span class="comma macro">,</span> <span class="variable declaration macro">ничоси</span> <span class="operator macro">=</span> <span class="numeric_literal macro">92</span><span class="parenthesis macro">)</span><span class="semicolon">;</span>
 
     <span class="macro">println</span><span class="macro_bang">!</span><span class="parenthesis macro">(</span><span class="string_literal macro">"</span><span class="format_specifier">{</span><span class="format_specifier">:</span><span class="variable">x</span><span class="format_specifier">?</span><span class="format_specifier">}</span><span class="string_literal macro"> </span><span class="format_specifier">{</span><span class="format_specifier">}</span><span class="string_literal macro"> "</span><span class="comma macro">,</span> <span class="unresolved_reference macro">thingy</span><span class="comma macro">,</span> <span class="unresolved_reference macro">n2</span><span class="parenthesis macro">)</span><span class="semicolon">;</span>
-    <span class="macro default_library library">panic</span><span class="macro_bang">!</span><span class="parenthesis macro">(</span><span class="string_literal macro">"</span><span class="format_specifier">{</span><span class="format_specifier">}</span><span class="string_literal macro">"</span><span class="comma macro">,</span> <span class="numeric_literal macro">0</span><span class="parenthesis macro">)</span><span class="semicolon">;</span>
+    <span class="macro default_library library">panic</span><span class="macro_bang">!</span><span class="parenthesis macro">(</span><span class="string_literal macro">"{}"</span><span class="comma macro">,</span> <span class="numeric_literal macro">0</span><span class="parenthesis macro">)</span><span class="semicolon">;</span>
     <span class="macro default_library library">panic</span><span class="macro_bang">!</span><span class="parenthesis macro">(</span><span class="string_literal macro">"more </span><span class="format_specifier">{</span><span class="format_specifier">}</span><span class="string_literal macro">"</span><span class="comma macro">,</span> <span class="numeric_literal macro">1</span><span class="parenthesis macro">)</span><span class="semicolon">;</span>
-    <span class="macro default_library library">assert</span><span class="macro_bang">!</span><span class="parenthesis macro">(</span><span class="bool_literal macro">true</span><span class="comma macro">,</span> <span class="string_literal macro">"</span><span class="format_specifier">{</span><span class="format_specifier">}</span><span class="string_literal macro">"</span><span class="comma macro">,</span> <span class="numeric_literal macro">1</span><span class="parenthesis macro">)</span><span class="semicolon">;</span>
+    <span class="macro default_library library">assert</span><span class="macro_bang">!</span><span class="parenthesis macro">(</span><span class="bool_literal macro">true</span><span class="comma macro">,</span> <span class="string_literal macro">"{}"</span><span class="comma macro">,</span> <span class="numeric_literal macro">1</span><span class="parenthesis macro">)</span><span class="semicolon">;</span>
     <span class="macro default_library library">assert</span><span class="macro_bang">!</span><span class="parenthesis macro">(</span><span class="bool_literal macro">true</span><span class="comma macro">,</span> <span class="string_literal macro">"</span><span class="format_specifier">{</span><span class="format_specifier">}</span><span class="string_literal macro"> asdasd"</span><span class="comma macro">,</span> <span class="numeric_literal macro">1</span><span class="parenthesis macro">)</span><span class="semicolon">;</span>
     <span class="macro">toho</span><span class="macro_bang">!</span><span class="parenthesis macro">(</span><span class="string_literal macro">"{}fmt"</span><span class="comma macro">,</span> <span class="numeric_literal macro">0</span><span class="parenthesis macro">)</span><span class="semicolon">;</span>
     <span class="keyword">let</span> <span class="variable declaration">i</span><span class="colon">:</span> <span class="builtin_type">u64</span> <span class="operator">=</span> <span class="numeric_literal">3</span><span class="semicolon">;</span>

crates/test-utils/src/minicore.rs

@@ -28,7 +28,7 @@
 //!     env: option
 //!     eq: sized
 //!     error: fmt
-//!     fmt: option, result, transmute, coerce_unsized
+//!     fmt: option, result, transmute, coerce_unsized, copy, clone, derive
 //!     fn:
 //!     from: sized
 //!     future: pin
@@ -919,6 +919,7 @@ pub mod fmt {
             type Opaque;
         }
 
+        #[derive(Copy, Clone)]
         #[lang = "format_argument"]
         pub struct Argument<'a> {
             value: &'a Opaque,
@@ -986,6 +987,7 @@ pub mod fmt {
         }
     }
 
+    #[derive(Copy, Clone)]
     #[lang = "format_arguments"]
     pub struct Arguments<'a> {
         pieces: &'a [&'static str],
@@ -1421,6 +1423,7 @@ mod panicking {
 }
 // endregion:panic
 
+#[macro_use]
 mod macros {
     // region:panic
     #[macro_export]