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authorEelco Dolstra <edolstra@gmail.com>2018-05-02T11·56+0200
committerEelco Dolstra <edolstra@gmail.com>2018-05-02T11·56+0200
commit53ec5ac69f59ac435b18297a594933e83e236766 (patch)
treef50797b3f3338de1d471a9b6f3b3e377813f09c9 /src/libexpr/attr-set.cc
parent548ad391d96d8922d0f8c35b5dd72bf4fb7e3ed1 (diff)
Fix some random -Wconversion warnings
Diffstat (limited to 'src/libexpr/attr-set.cc')
-rw-r--r--src/libexpr/attr-set.cc8
1 files changed, 5 insertions, 3 deletions
diff --git a/src/libexpr/attr-set.cc b/src/libexpr/attr-set.cc
index b284daa3c2f7..0474865c6d7d 100644
--- a/src/libexpr/attr-set.cc
+++ b/src/libexpr/attr-set.cc
@@ -24,13 +24,15 @@ static void * allocBytes(size_t n)
 /* Allocate a new array of attributes for an attribute set with a specific
    capacity. The space is implicitly reserved after the Bindings
    structure. */
-Bindings * EvalState::allocBindings(Bindings::size_t capacity)
+Bindings * EvalState::allocBindings(size_t capacity)
 {
-    return new (allocBytes(sizeof(Bindings) + sizeof(Attr) * capacity)) Bindings(capacity);
+    if (capacity > std::numeric_limits<Bindings::size_t>::max())
+        throw Error("attribute set of size %d is too big", capacity);
+    return new (allocBytes(sizeof(Bindings) + sizeof(Attr) * capacity)) Bindings((Bindings::size_t) capacity);
 }
 
 
-void EvalState::mkAttrs(Value & v, unsigned int capacity)
+void EvalState::mkAttrs(Value & v, size_t capacity)
 {
     if (capacity == 0) {
         v = vEmptySet;