Test failures with macrotest 1.1.0

Steps:

Starting at a830445e

nailing-cargo update -p macrotest
nailing-cargo -u test --workspace --all-features -- expand

Unexpected error output:

[much elided]
expand/select1.rs - different!
Diff [lines: 23 added, 0 removed]:
--------------------------
 //! Test case / example for `${select }`
 use std::fmt::Debug;
 use derive_deftly::{derive_deftly_adhoc, Deftly};
 use derive_deftly_tests::*;
 #[derive_deftly_adhoc]
 struct Both {
     #[deftly(left)]
     a: usize,
     #[deftly(right)]
     b: usize,
     #[deftly(right)]
     c: usize,
 }
 #[automatically_derived]
 impl ::core::default::Default for Both {
     #[inline]
     fn default() -> Both {
         Both {
             a: ::core::default::Default::default(),
             b: ::core::default::Default::default(),
             c: ::core::default::Default::default(),
         }
     }
 }
 #[automatically_derived]
 impl ::core::fmt::Debug for Both {
     #[inline]
     fn fmt(&self, f: &mut ::core::fmt::Formatter) -> ::core::fmt::Result {
         ::core::fmt::Formatter::debug_struct_field3_finish(
             f,
             "Both",
             "a",
             &self.a,
             "b",
             &self.b,
             "c",
             &&self.c,
         )
     }
 }
+struct Left {
+    a: usize,
+}
+#[automatically_derived]
+impl ::core::default::Default for Left {
+    #[inline]
+    fn default() -> Left {
+        Left {
+            a: ::core::default::Default::default(),
+        }
+    }
+}
+#[automatically_derived]
+impl ::core::fmt::Debug for Left {
+    #[inline]
+    fn fmt(&self, f: &mut ::core::fmt::Formatter) -> ::core::fmt::Result {
+        ::core::fmt::Formatter::debug_struct_field1_finish(f, "Left", "a", &&self.a)
+    }
+}
+struct Right {
+    b: usize,
+    c: usize,
+}
 fn main() {
     match (&Left::default().to_debug(), &"Left { a: 0 }") {
         (left_val, right_val) => {
             if !(*left_val == *right_val) {
                 let kind = ::core::panicking::AssertKind::Eq;
                 ::core::panicking::assert_failed(
                     kind,
                     &*left_val,
                     &*right_val,
                     ::core::option::Option::None,
                 );
             }
         }
     }
 }
 
--------------------------




thread 'macrotest_expand' panicked at /home/rustcargo/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/macrotest-1.1.0/src/expand.rs:174:9:
18 of 19 tests failed
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

assigned to @Diziet

changed title from Test failures with macrotest 1.0.0 to Test failures with macrotest 1.1.0

Turns out to be

• bug in proc_macro_crate https://github.com/bkchr/proc-macro-crate/issues/57
• induced by a bad API in toml_edit https://github.com/toml-rs/toml/issues/838
• triggered by (coincidentally) macro test switching to toml_edit, documented here https://github.com/eupn/macrotest/issues/123

MR to fix in proc-macro-crate https://github.com/bkchr/proc-macro-crate/pull/58

mentioned in commit 21f76dc2

mentioned in merge request !506 (merged)

mentioned in commit 5e182aeb

closed with commit 21f76dc2