! { dg-do compile } ! PR 23765 : We used to incorrectly accept common blocks with no symbols common ! { dg-error "Syntax error" } common // ! { dg-error "Syntax error" } common /a/ ! { dg-error "Syntax error" } common /b/x/c/ ! { dg-error "Syntax error" } common y/d/ ! { dg-error "Syntax error" } common /e//f/ ! { dg-error "Syntax error" } common ///g/ ! { dg-error "Syntax error" } end