+RTS -G1 is broken

A number of tests fail with +RTS -G1, including cgrun026. I had a quick look into it: This code in GarbageCollect:

  if (RtsFlags.GcFlags.generations == 1) {
      if (g0->blocks != NULL) {
          freeChain(g0->blocks);
          g0->blocks = NULL;
      }   
  }

doesn't set:

          g0->n_blocks = 0;

so causes an:

    ASSERT(countBlocks(gen->blocks) == gen->n_blocks);

test in Sanity to fail. Presumably setting n_blocks to 0 is the right thing to do.

Then, running with -DS, LOOKS_LIKE_INFO_PTR ends up being passed 0xAA...AA. I haven't looked further into this yet.

Once fixed, add a test (or perhaps make the codegen tests all be run with +RTS -G1?)

Trac metadata

Trac field	Value
Version	7.0.2
Type	Bug
TypeOfFailure	OtherFailure
Priority	high
Resolution	Unresolved
Component	Runtime System
Test case
Differential revisions
BlockedBy
Related
Blocking
CC
Operating system
Architecture