fix todos regarding InvalidCycle

compiler/constrain/src/expr.rs

@@ -872,38 +872,35 @@ pub fn constrain_decls(
 ) -> Constraint {
     let mut constraint = Constraint::SaveTheEnvironment;
 
+    let mut env = Env {
+        home,
+        rigids: ImMap::default(),
+    };
+
     for decl in decls.iter().rev() {
-        // NOTE: rigids are empty because they are not shared between top-level definitions
+        // Clear the rigids from the previous iteration.
+        // rigids are not shared between top-level definitions
+        env.rigids.clear();
+
         match decl {
             Declaration::Declare(def) => {
                 constraint = exists_with_aliases(
                     aliases.clone(),
                     Vec::new(),
-                    constrain_def(
+                    constrain_def(&env, def, constraint),
-                        &Env {
-                            home,
-                            rigids: ImMap::default(),
-                        },
-                        def,
-                        constraint,
-                    ),
                 );
             }
             Declaration::DeclareRec(defs) => {
                 constraint = exists_with_aliases(
                     aliases.clone(),
                     Vec::new(),
-                    constrain_recursive_defs(
+                    constrain_recursive_defs(&env, defs, constraint),
-                        &Env {
-                            home,
-                            rigids: ImMap::default(),
-                        },
-                        defs,
-                        constraint,
-                    ),
                 );
             }
-            Declaration::InvalidCycle(_, _) => panic!("TODO handle invalid cycle"),
+            Declaration::InvalidCycle(_, _) => {
+                // invalid cycles give a canonicalization error. we skip them here.
+                continue;
+            }
         }
     }
 

compiler/constrain/src/uniq.rs

@@ -78,24 +78,33 @@ pub fn constrain_decls(
                     sharing::annotate_usage(&def.loc_expr.value, &mut var_usage);
                 }
             }
-            Declaration::InvalidCycle(_, _) => panic!("TODO handle invalid cycle"),
+            Declaration::InvalidCycle(_, _) => {
+                // any usage of a value defined in an invalid cycle will blow up
+                // so for the analysis usage by such values doesn't count
+                continue;
+            }
         }
     }
 
     aliases_to_attr_type(var_store, &mut aliases);
 
+    let mut env = Env {
+        home,
+        rigids: ImMap::default(),
+    };
+
     for decl in decls.iter().rev() {
-        // NOTE: rigids are empty because they are not shared between top-level definitions
+        // clear the set of rigids from the previous iteration.
+        // rigids are not shared between top-level definitions.
+        env.rigids.clear();
+
         match decl {
             Declaration::Declare(def) => {
                 constraint = exists_with_aliases(
                     aliases.clone(),
                     Vec::new(),
                     constrain_def(
-                        &Env {
+                        &env,
-                            home,
-                            rigids: ImMap::default(),
-                        },
                         var_store,
                         &var_usage,
                         &mut ImSet::default(),
@@ -109,10 +118,7 @@ pub fn constrain_decls(
                     aliases.clone(),
                     Vec::new(),
                     constrain_recursive_defs(
-                        &Env {
+                        &env,
-                            home,
-                            rigids: ImMap::default(),
-                        },
                         var_store,
                         &var_usage,
                         &mut ImSet::default(),
@@ -121,7 +127,10 @@ pub fn constrain_decls(
                     ),
                 );
             }
-            Declaration::InvalidCycle(_, _) => panic!("TODO handle invalid cycle"),
+            Declaration::InvalidCycle(_, _) => {
+                // invalid cycles give a canonicalization error. we skip them here.
+                continue;
+            }
         }
     }
 

compiler/reporting/tests/test_reporting.rs

@@ -1702,6 +1702,7 @@ mod test_reporting {
 
     #[test]
     fn circular_definition_self() {
+        // invalid recursion
         report_problem_as(
             indoc!(
                 r#"
@@ -1723,6 +1724,7 @@ mod test_reporting {
 
     #[test]
     fn circular_definition() {
+        // invalid mutual recursion
         report_problem_as(
             indoc!(
                 r#"