diff --git a/basis/compiler/cfg/cfg.factor b/basis/compiler/cfg/cfg.factor
index a595a87b3b..035cc63b1e 100644
--- a/basis/compiler/cfg/cfg.factor
+++ b/basis/compiler/cfg/cfg.factor
@@ -4,6 +4,7 @@ USING: kernel math vectors arrays accessors namespaces ;
 IN: compiler.cfg
 
 TUPLE: basic-block < identity-tuple
+id
 number
 { instructions vector }
 { successors vector }
@@ -11,10 +12,13 @@ number
 
 : <basic-block> ( -- bb )
     basic-block new
+        \ basic-block counter >>id
         V{ } clone >>instructions
         V{ } clone >>successors
         V{ } clone >>predecessors ;
 
+M: basic-block hashcode* nip id>> ;
+
 TUPLE: cfg { entry basic-block } word label
 spill-area-size reps
 post-order linear-order
diff --git a/basis/compiler/tests/intrinsics.factor b/basis/compiler/tests/intrinsics.factor
index b2159e9c09..7fe5e2b601 100755
--- a/basis/compiler/tests/intrinsics.factor
+++ b/basis/compiler/tests/intrinsics.factor
@@ -585,16 +585,16 @@ TUPLE: alien-accessor-regression { b byte-array } { i fixnum } ;
     swap [
         { tuple } declare 1 slot
     ] [
-        0 slot
+        1 slot
     ] if ;
 
-[ t ] [ f B{ } mutable-value-bug-1 byte-array type-number = ] unit-test
+[ 0 ] [ f { } mutable-value-bug-1 ] unit-test
 
 : mutable-value-bug-2 ( a b -- c )
     swap [
-        0 slot
+        1 slot
     ] [
         { tuple } declare 1 slot
     ] if ;
 
-[ t ] [ t B{ } mutable-value-bug-2 byte-array type-number = ] unit-test
+[ 0 ] [ t { } mutable-value-bug-2 ] unit-test
diff --git a/core/io/pathnames/pathnames-docs.factor b/core/io/pathnames/pathnames-docs.factor
index 07664ba331..8dacef6f8c 100644
--- a/core/io/pathnames/pathnames-docs.factor
+++ b/core/io/pathnames/pathnames-docs.factor
@@ -134,7 +134,7 @@ $nl
 "If a pathname begins with " { $snippet "vocab:" } ", then it will be searched for in all current vocabulary roots (see " { $link "add-vocab-roots" } ")." ;
 
 ARTICLE: "io.pathnames.presentations" "Pathname presentations"
-"Pathname presentations are objects that wrap a pathname string.  Clicking a pathname presentation in the UI brings up the file in one of the supported editors. See " { $link "editor" } " for more details."
+"Pathname presentations are objects that wrap a pathname string. Clicking a pathname presentation in the UI brings up the file in one of the supported editors. See " { $link "editor" } " for more details."
 { $subsections
     pathname
     <pathname>