Handle IND_STATIC in isRetainer

[ghc-hetmet.git] / rts / RetainerProfile.c

diff --git a/rts/RetainerProfile.c b/rts/RetainerProfile.c
index d14ba06..07a3db4 100644 (file)
--- a/rts/RetainerProfile.c
+++ b/rts/RetainerProfile.c
@@ -1054,6 +1054,10 @@ isRetainer( StgClosure *c )
     case PAP:
        // indirection
     case IND_PERM:
+    // IND_STATIC used to be an error, but at the moment it can happen
+    // as isAlive doesn't look through IND_STATIC as it ignores static
+    // closures. See trac #3956 for a program that hit this error.
+    case IND_STATIC:
     case BLACKHOLE:
        // static objects
     case CONSTR_STATIC:
@@ -1069,8 +1073,6 @@ isRetainer( StgClosure *c )
        //
        // Error case
        //
-       // IND_STATIC cannot be *c, *cp, *r in the retainer profiling loop.
-    case IND_STATIC:
        // CONSTR_NOCAF_STATIC
        // cannot be *c, *cp, *r in the retainer profiling loop.
     case CONSTR_NOCAF_STATIC: