Loops: copy reference to next entity before entering lambda

diff --git a/qcsrc/lib/iter.qh b/qcsrc/lib/iter.qh
index c21d02121347d34b79042a31809ccd421693ab3f..82448b931bed86c3788be433ea8fd9588b130145 100644 (file)
--- a/qcsrc/lib/iter.qh
+++ b/qcsrc/lib/iter.qh
@@ -23,10 +23,11 @@
        MACRO_BEGIN \
        { \
                int _i = 0; \
-               for (entity _it = list##_first; _it; (_it = _it.next, ++_i)) \
+               for (entity _it = list##_first, _next = NULL; _it; (_it = _next, ++_i)) \
                { \
                        const noref int i = _i; \
                        ITER_CONST noref entity it = _it; \
+                       _next = _it.next; \
                        if (cond) { LAMBDA(body) } \
                } \
        } MACRO_END