diff --git a/std/base64.d b/std/base64.d
index c9f7b2942..5c7912b35 100644
--- a/std/base64.d
+++ b/std/base64.d
@@ -1430,6 +1430,7 @@ template Base64Impl(char Map62th, char Map63th, char Padding = '=')
  */
 class Base64Exception : Exception
 {
+    @safe pure nothrow
     this(string s, string fn = __FILE__, size_t ln = __LINE__)
     {
         super(s, fn, ln);
diff --git a/std/conv.d b/std/conv.d
index d0f577d83..737ce74e1 100644
--- a/std/conv.d
+++ b/std/conv.d
@@ -37,6 +37,7 @@ import std.format;
  */
 class ConvException : Exception
 {
+    @safe pure nothrow
     this(string s, string fn = __FILE__, size_t ln = __LINE__)
     {
         super(s, fn, ln);
@@ -65,6 +66,7 @@ private auto convError(S, T)(S source, int radix, string fn = __FILE__, size_t l
         fn, ln);
 }
 
+@safe pure/* nothrow*/  // lazy parameter bug
 private auto parseError(lazy string msg, string fn = __FILE__, size_t ln = __LINE__)
 {
     return new ConvException(text("Can't parse string: ", msg), fn, ln);
@@ -139,6 +141,7 @@ private
  */
 class ConvOverflowException : ConvException
 {
+    @safe pure nothrow
     this(string s, string fn = __FILE__, size_t ln = __LINE__)
     {
         super(s, fn, ln);
@@ -2169,7 +2172,7 @@ Target parse(Target, Source)(ref Source p)
     // static immutable string infinity = "infinity";
     // static immutable string nans = "nans";
 
-    ConvException bailOut(string msg = null, string fn = __FILE__, size_t ln = __LINE__)
+    ConvException bailOut()(string msg = null, string fn = __FILE__, size_t ln = __LINE__)
     {
         if (!msg)
             msg = "Floating point conversion error";
diff --git a/std/format.d b/std/format.d
index ea270bf8d..8b3920e56 100644
--- a/std/format.d
+++ b/std/format.d
@@ -51,11 +51,13 @@ version (DigitalMarsC)
  */
 class FormatException : Exception
 {
+    @safe pure nothrow
     this()
     {
         super("format error");
     }
 
+    @safe pure nothrow
     this(string msg, string fn = __FILE__, size_t ln = __LINE__, Throwable next = null)
     {
         super(msg, fn, ln, next);
diff --git a/std/net/curl.d b/std/net/curl.d
index c8ea19657..642519324 100644
--- a/std/net/curl.d
+++ b/std/net/curl.d
@@ -3357,6 +3357,7 @@ class CurlException : Exception
             line = The line number where the exception occurred.
             next = The previous exception in the chain of exceptions, if any.
       +/
+    @safe pure nothrow
     this(string msg,
          string file = __FILE__,
          size_t line = __LINE__,
@@ -3378,6 +3379,7 @@ class CurlTimeoutException : CurlException
             line = The line number where the exception occurred.
             next = The previous exception in the chain of exceptions, if any.
       +/
+    @safe pure nothrow
     this(string msg,
          string file = __FILE__,
          size_t line = __LINE__,
diff --git a/std/utf.d b/std/utf.d
index 6c28b5a7c..215aa8c07 100644
--- a/std/utf.d
+++ b/std/utf.d
@@ -45,8 +45,8 @@ class UTFException : Exception
     uint[4] sequence;
     size_t  len;
 
-
-    UTFException setSequence(uint[] data...) @safe pure nothrow
+    @safe pure nothrow
+    UTFException setSequence(uint[] data...)
     {
         import std.algorithm;
 
@@ -58,13 +58,13 @@ class UTFException : Exception
         return this;
     }
 
-
+    @safe pure nothrow
     this(string msg, string file = __FILE__, size_t line = __LINE__, Throwable next = null)
     {
         super(msg, file, line, next);
     }
 
-
+    @safe pure
     this(string msg, size_t index, string file = __FILE__, size_t line = __LINE__, Throwable next = null)
     {
         import std.string;
diff --git a/std/windows/registry.d b/std/windows/registry.d
index f3c7b62ca..452b2919a 100644
--- a/std/windows/registry.d
+++ b/std/windows/registry.d
@@ -68,11 +68,13 @@ class Win32Exception : Exception
 {
     int error;
 
+    @safe pure nothrow
     this(string message, string fn = __FILE__, size_t ln = __LINE__, Throwable next = null)
     {
         super(message, fn, ln, next);
     }
 
+    @safe pure
     this(string message, int errnum, string fn = __FILE__, size_t ln = __LINE__, Throwable next = null)
     {
         super(text(message, " (", errnum, ")"), fn, ln, next);
@@ -116,6 +118,7 @@ public:
         Params:
             message = The message associated with the exception.
      */
+    @safe pure
     this(string message, string fn = __FILE__, size_t ln = __LINE__, Throwable next = null)
     {
         super(message, fn, ln, next);
@@ -128,6 +131,7 @@ public:
             message = The message associated with the exception.
             error = The Win32 error number associated with the exception.
      */
+    @safe pure
     this(string message, int error, string fn = __FILE__, size_t ln = __LINE__, Throwable next = null)
     {
         super(message, error, fn, ln, next);
@@ -782,12 +786,14 @@ private void regProcessNthValue(HKEY hkey, scope void delegate(scope LONG delega
  */
 class Key
 {
+    @safe pure nothrow
     invariant()
     {
         assert(m_hkey !is null);
     }
 
 private:
+    @safe pure nothrow
     this(HKEY hkey, string name, bool created)
     in
     {
@@ -1147,12 +1153,14 @@ private:
  */
 class Value
 {
+    @safe pure nothrow
     invariant()
     {
         assert(m_key !is null);
     }
 
 private:
+    @safe pure nothrow
     this(Key key, string name, REG_VALUE_TYPE type)
     in
     {
@@ -1363,12 +1371,14 @@ foreach (string subkeyName; key.keyNames)
  */
 class KeyNameSequence
 {
+    @safe pure nothrow
     invariant()
     {
         assert(m_key !is null);
     }
 
 private:
+    @safe pure nothrow
     this(Key key)
     {
         m_key = key;
@@ -1458,12 +1468,14 @@ foreach (Key subkey; key.keys)
  */
 class KeySequence
 {
+    @safe pure nothrow
     invariant()
     {
         assert(m_key !is null);
     }
 
 private:
+    @safe pure nothrow
     this(Key key)
     {
         m_key = key;
@@ -1565,12 +1577,14 @@ foreach (string valueName; key.valueNames)
  */
 class ValueNameSequence
 {
+    @safe pure nothrow
     invariant()
     {
         assert(m_key !is null);
     }
 
 private:
+    @safe pure nothrow
     this(Key key)
     {
         m_key = key;
@@ -1659,12 +1673,14 @@ foreach (Value value; key.values)
  */
 class ValueSequence
 {
+    @safe pure nothrow
     invariant()
     {
         assert(m_key !is null);
     }
 
 private:
+    @safe pure nothrow
     this(Key key)
     {
         m_key = key;