Remove unnecessary assert that unions have only one variant

gereeter · gereeter · commit da9791767bf9 · 2017-12-23T20:38:36.000-06:00
diff --git a/src/librustc/ty/layout.rs b/src/librustc/ty/layout.rs
@@ -1357,9 +1357,6 @@ impl<'a, 'tcx> LayoutDetails {
                     if packed && def.repr.align > 0 {
                         bug!("Union cannot be packed and aligned");
                     }
-                    if variants.len() != 1 {
-                        bug!("Union must be represented as a single variant");
-                    }
 
                     let mut align = if def.repr.packed() {
                         dl.i8_align

Original file line number	Diff line number	Diff line change
`@@ -1357,9 +1357,6 @@ impl<'a, 'tcx> LayoutDetails {`
`1357`	`1357`	`if packed && def.repr.align > 0 {`
`1358`	`1358`	`bug!("Union cannot be packed and aligned");`
`1359`	`1359`	`}`
`1360`		`- if variants.len() != 1 {`
`1361`		`- bug!("Union must be represented as a single variant");`
`1362`		`- }`
`1363`	`1360`
`1364`	`1361`	`let mut align = if def.repr.packed() {`
`1365`	`1362`	`dl.i8_align`