json_view: a value that is not found has no bytes in its exception context (#6015)

include/nlohmann/detail/view/builder.hpp

@@ -1174,8 +1174,9 @@ indent_done:
             {
                 ++p;
             }
-            else if (NLOHMANN_VIEW_LIKELY(cur() >= '1' && cur() <= '9'))
+            else if (!negative || NLOHMANN_VIEW_LIKELY(cur() >= '1' && cur() <= '9'))
             {
+                // (without a sign, the dispatch saw a digit)
                 p = skip_digits(p + 1, e);
             }
             else

single_include/nlohmann/json_view.hpp

@@ -2479,8 +2479,9 @@ indent_done:
             {
                 ++p;
             }
-            else if (NLOHMANN_VIEW_LIKELY(cur() >= '1' && cur() <= '9'))
+            else if (!negative || NLOHMANN_VIEW_LIKELY(cur() >= '1' && cur() <= '9'))
             {
+                // (without a sign, the dispatch saw a digit)
                 p = skip_digits(p + 1, e);
             }
             else

tests/src/unit-allocator.cpp

@@ -1026,10 +1026,7 @@ TEST_CASE("insert() provides its documented exception guarantees (#5986)")
 }
 #endif
 
-// the no-exceptions CI job has no std::bad_alloc to catch; with iterator
-// debugging (MSVC STL debug builds) containers allocate inside noexcept
-// functions, so failing an allocation there terminates the program
-#if !defined(JSON_NOEXCEPTION) && !(defined(_ITERATOR_DEBUG_LEVEL) && _ITERATOR_DEBUG_LEVEL > 0)
+#if !defined(JSON_NOEXCEPTION)
 namespace
 {
 // the allocation numbered sweep_fail_at (counted from 1) throws; 0 never fails