error: expected identifier, found `1234test`
  --> $DIR/issue-104088.rs:1:4
   |
LL | fn 1234test() {
   |    ^^^^^^^^ expected identifier
   |
help: identifiers cannot start with a number
  --> $DIR/issue-104088.rs:1:4
   |
LL | fn 1234test() {
   |    ^^^^

error: expected identifier, found `23name`
  --> $DIR/issue-104088.rs:9:9
   |
LL |     let 23name = 123;
   |         ^^^^^^ expected identifier
   |
help: identifiers cannot start with a number
  --> $DIR/issue-104088.rs:9:9
   |
LL |     let 23name = 123;
   |         ^^

error: expected identifier, found `2x`
  --> $DIR/issue-104088.rs:12:9
   |
LL |     let 2x: i32 = 123;
   |         ^^ expected identifier
   |
help: identifiers cannot start with a number
  --> $DIR/issue-104088.rs:12:9
   |
LL |     let 2x: i32 = 123;
   |         ^

error: expected identifier, found `1x`
  --> $DIR/issue-104088.rs:15:9
   |
LL |     let 1x = 123;
   |         ^^ expected identifier
   |
help: identifiers cannot start with a number
  --> $DIR/issue-104088.rs:15:9
   |
LL |     let 1x = 123;
   |         ^

error[E0308]: mismatched types
  --> $DIR/issue-104088.rs:5:12
   |
LL |     if let 2e1 = 123 {
   |            ^^^   --- this expression has type `{integer}`
   |            |
   |            expected integer, found floating-point number

error: aborting due to 5 previous errors

For more information about this error, try `rustc --explain E0308`.