FTBFS - test failure in test_debug_tokenstream

[Dan Bungert]

Attempting to autopkgtest rust-proc-macro2 fails as follows:

thread 'main' panicked at 'assertion failed: `(left == right)`
  left: `"TokenStream [\n Group {\n delimiter: Bracket,\n stream: TokenStream [\n Ident {\n sym: a,\n span: bytes(2..3),\n },\n Punct {\n op: \'+\',\n spacing: Alone,\n span: bytes(4..5),\n },\n Literal {\n lit: 1,\n span: bytes(6..7),\n },\n ],\n span: bytes(1..8),\n },\n]"`,
 right: `"TokenStream [\n Group {\n delimiter: Bracket,\n stream: TokenStream [\n Ident {\n sym: a,\n span: bytes(979..980),\n },\n Punct {\n op: \'+\',\n spacing: Alone,\n span: bytes(981..982),\n },\n Literal {\n lit: 1,\n span: bytes(983..984),\n },\n ],\n span: bytes(978..985),\n },\n]"`', tests/test.rs:409:9

Smaller variants of the test has similar results, where the span bytes don't match expectations.

[Brian Murray (brian-murray)]

I'm unable to recreate this using autopkgtest with a qemu backend and package version 1.0.28-1 but its still clearly failing in our autopkgtest environment.

[Dan Bungert (dbungert)]

I just ran two autopkgtests using the schroot backend.

rust-proc-macro2-1.0.18-1 failed with:
thread 'lifetime_invalid' panicked at '"'a#" is not a valid Ident', src/fallback.rs:695:9

rust-proc-macro2-1.0.28-1 passes for me

[Jeremy Bícha (jbicha)]

This is fixed for Lunar and Mantic but the autopkgtests are still failing on Jammy

https://autopkgtest.ubuntu.com/packages/rust-proc-macro2