Squashed 'dmd2/' changes from 3443f38..fc63fd3

fc63fd3 fix Issue 7843 - Regression(2.059 beta): Informational warning fails to produce executable
5947676 fix Issue 7820 - regression(DMD 2.059head) Wrong error on forward reference to 'front' with -property switch
8789ad7 fix Issue 7815 - Mixin template forward reference (?) regression
41ad039 Merge pull request #862 from 9rnsr/fix7814
05224bd Merge pull request #859 from 9rnsr/fix7812
3c74279 Merge pull request #857 from 9rnsr/fix7808
3b6c54f Merge pull request #864 from donc/regression7786
9afb367 Fix typo in error message for 7786
6acabc2 Fix issue 7786 dmd crashes with invalid module name
7df0068 fix Issue 7814 - ICE(tocsym.c) using scope(failure) within foreach-range
2bf1c32 fix Issue 7812 - Segfault on invalid code during template match deduction with errors gagged
a4f7070 fix Issue 7808 - Nullable's alias this does not work with structs containing classes

git-subtree-dir: dmd2
git-subtree-split: fc63fd36d82117947f360496dcb625af99c16133

statement.c

@@ -4579,7 +4579,9 @@ Catch *Catch::syntaxCopy()
 }
 
 void Catch::semantic(Scope *sc)
-{   ScopeDsymbol *sym;
+{
+    if (type && type->deco)
+        return;
 
     //printf("Catch::semantic(%s)\n", ident->toChars());
 
@@ -4596,7 +4598,7 @@ void Catch::semantic(Scope *sc)
     }
 #endif
 
-    sym = new ScopeDsymbol();
+    ScopeDsymbol *sym = new ScopeDsymbol();
     sym->parent = sc->scopesym;
     sc = sc->push(sym);