diff --git a/include/fmt/core.h b/include/fmt/core.h
index c946e12a64a8..2a3334225ef2 100644
--- a/include/fmt/core.h
+++ b/include/fmt/core.h
@@ -16,6 +16,9 @@
 #include <string>
 #include <type_traits>
 
+#undef FMT_EXCEPTIONS
+#define FMT_EXCEPTIONS 0
+
 // The fmt library version in the form major * 10000 + minor * 100 + patch.
 #define FMT_VERSION 80100
 
@@ -2059,7 +2062,8 @@ enum class presentation_type : unsigned char {
   general_upper,   // 'G'
   chr,             // 'c'
   string,          // 's'
-  pointer          // 'p'
+  pointer,         // 'p'
+  any              // 'y'
 };
 
 // Format specifiers for built-in and string types.
@@ -2475,6 +2479,8 @@ FMT_CONSTEXPR auto parse_presentation_type(Char type) -> presentation_type {
     return presentation_type::string;
   case 'p':
     return presentation_type::pointer;
+  case 'y':
+    return presentation_type::any;
   default:
     return presentation_type::none;
   }
@@ -2695,7 +2701,7 @@ class compile_parse_context
 template <typename ErrorHandler>
 FMT_CONSTEXPR void check_int_type_spec(presentation_type type,
                                        ErrorHandler&& eh) {
-  if (type > presentation_type::bin_upper && type != presentation_type::chr)
+  if (type > presentation_type::bin_upper && type != presentation_type::chr && type != presentation_type::any)
     eh.on_error("invalid type specifier");
 }
 
@@ -2703,8 +2709,8 @@ FMT_CONSTEXPR void check_int_type_spec(presentation_type type,
 template <typename Char, typename ErrorHandler = error_handler>
 FMT_CONSTEXPR auto check_char_specs(const basic_format_specs<Char>& specs,
                                     ErrorHandler&& eh = {}) -> bool {
-  if (specs.type != presentation_type::none &&
-      specs.type != presentation_type::chr) {
+  if (specs.type != presentation_type::none && specs.type != presentation_type::chr &&
+      specs.type != presentation_type::string && specs.type != presentation_type::any) {
     check_int_type_spec(specs.type, eh);
     return false;
   }
@@ -2747,6 +2753,7 @@ FMT_CONSTEXPR auto parse_float_type_spec(const basic_format_specs<Char>& specs,
     result.upper = true;
     FMT_FALLTHROUGH;
   case presentation_type::general_lower:
+  case presentation_type::any:
     result.format = float_format::general;
     break;
   case presentation_type::exp_upper:
@@ -2771,6 +2778,7 @@ FMT_CONSTEXPR auto parse_float_type_spec(const basic_format_specs<Char>& specs,
     break;
   default:
     eh.on_error("invalid type specifier");
+    result.format = float_format::general;
     break;
   }
   return result;
@@ -2779,23 +2787,27 @@ FMT_CONSTEXPR auto parse_float_type_spec(const basic_format_specs<Char>& specs,
 template <typename ErrorHandler = error_handler>
 FMT_CONSTEXPR auto check_cstring_type_spec(presentation_type type,
                                            ErrorHandler&& eh = {}) -> bool {
-  if (type == presentation_type::none || type == presentation_type::string)
+  if (type == presentation_type::none || type == presentation_type::string ||
+      type == presentation_type::any)
     return true;
-  if (type != presentation_type::pointer) eh.on_error("invalid type specifier");
-  return false;
+  if (type != presentation_type::pointer)
+    eh.on_error("invalid type specifier");
+  return true;
 }
 
 template <typename ErrorHandler = error_handler>
 FMT_CONSTEXPR void check_string_type_spec(presentation_type type,
                                           ErrorHandler&& eh = {}) {
-  if (type != presentation_type::none && type != presentation_type::string)
+  if (type != presentation_type::none && type != presentation_type::string &&
+      type != presentation_type::any)
     eh.on_error("invalid type specifier");
 }
 
 template <typename ErrorHandler>
 FMT_CONSTEXPR void check_pointer_type_spec(presentation_type type,
                                            ErrorHandler&& eh) {
-  if (type != presentation_type::none && type != presentation_type::pointer)
+  if (type != presentation_type::none && type != presentation_type::pointer &&
+      type != presentation_type::any)
     eh.on_error("invalid type specifier");
 }
 
diff --git a/include/fmt/format-inl.h b/include/fmt/format-inl.h
index 04ded48292e5..59f5c0c1afd6 100644
--- a/include/fmt/format-inl.h
+++ b/include/fmt/format-inl.h
@@ -34,10 +34,7 @@ namespace detail {
 FMT_FUNC void assert_fail(const char* file, int line, const char* message) {
   // Use unchecked std::fprintf to avoid triggering another assertion when
   // writing to stderr fails
-  std::fprintf(stderr, "%s:%d: assertion failed: %s", file, line, message);
-  // Chosen instead of std::abort to satisfy Clang in CUDA mode during device
-  // code pass.
-  std::terminate();
+  std::fprintf(stderr, "%s:%d: assertion failed: %s\n", file, line, message);
 }
 
 FMT_FUNC void throw_format_error(const char* message) {
diff --git a/include/fmt/format.h b/include/fmt/format.h
index 1a5ff230092e..d72bef031b97 100644
--- a/include/fmt/format.h
+++ b/include/fmt/format.h
@@ -40,6 +40,7 @@
 #include <stdexcept>     // std::runtime_error
 #include <system_error>  // std::system_error
 #include <utility>       // std::swap
+#include <cfloat>        // DBL_DIG
 
 #ifdef __cpp_lib_bit_cast
 #  include <bit>  // std::bitcast
@@ -95,10 +96,17 @@ FMT_END_NAMESPACE
 #      define FMT_THROW(x) throw x
 #    endif
 #  else
-#    define FMT_THROW(x)               \
-      do {                             \
-        FMT_ASSERT(false, (x).what()); \
-      } while (false)
+#    ifdef _DEBUG
+#      define FMT_THROW(x)            \
+        do {                          \
+          ::printf("%s\n", x.what()); \
+        } while (false)
+#    else
+#      define FMT_THROW(x)            \
+        do {                          \
+          static_cast<void>(x);       \
+        } while (false)
+#    endif
 #  endif
 #endif
 
@@ -1573,6 +1581,10 @@ FMT_CONSTEXPR FMT_INLINE auto write_int(OutputIt out, write_int_arg<T> arg,
   auto abs_value = arg.abs_value;
   auto prefix = arg.prefix;
   switch (specs.type) {
+  default:
+    throw_format_error("invalid type specifier");
+    FMT_FALLTHROUGH;
+  case presentation_type::any:
   case presentation_type::none:
   case presentation_type::dec: {
     if (specs.localized &&
@@ -1621,8 +1633,6 @@ FMT_CONSTEXPR FMT_INLINE auto write_int(OutputIt out, write_int_arg<T> arg,
   }
   case presentation_type::chr:
     return write_char(out, static_cast<Char>(abs_value), specs);
-  default:
-    throw_format_error("invalid type specifier");
   }
   return out;
 }
@@ -1993,6 +2003,31 @@ FMT_CONSTEXPR20 auto write(OutputIt out, T value,
   if (const_check(!is_supported_floating_point(value))) return out;
   float_specs fspecs = parse_float_type_spec(specs);
   fspecs.sign = specs.sign;
+
+  if (specs.type == presentation_type::fixed_lower) {
+    static const double prevPowerOfTen[17] = {1e-1, 1,    1e1,  1e2,  1e3, 1e4,
+                                              1e5,  1e6,  1e7,  1e8,  1e9, 1e10,
+                                              1e11, 1e12, 1e13, 1e14, 1e15};
+    if (specs.precision < 0) {
+      specs.precision = 6;
+    }
+    if (specs.precision > DBL_DIG || fabs(value) >= prevPowerOfTen[DBL_DIG - specs.precision + 1]) {
+      specs.precision = DBL_DIG;
+      fspecs.format = float_format::general;
+      fspecs.showpoint = specs.alt;
+    } else {
+#ifdef __cpp_if_constexpr
+      if constexpr (std::is_same<T, double>()) {
+#else
+      if (std::is_same<T, double>()) {
+#endif
+        if (fabs(value) < prevPowerOfTen[DBL_DIG - specs.precision]) {
+          value = static_cast<T>( std::nextafter(value, value >= 0.0 ? 1e15 : -1e15) );
+        }
+      }
+    }
+  }
+
   if (detail::signbit(value)) {  // value < 0 is false for NaN so use signbit.
     fspecs.sign = sign::minus;
     value = -value;
diff --git a/include/fmt/printf.h b/include/fmt/printf.h
index 19d550f6cf53..48acaeb3d339 100644
--- a/include/fmt/printf.h
+++ b/include/fmt/printf.h
@@ -128,6 +128,9 @@ template <typename T, typename Context> class arg_converter {
 
   template <typename U, FMT_ENABLE_IF(std::is_integral<U>::value)>
   void operator()(U value) {
+    if (type_ != 'd' && type_ != 'i' && type_ != 'o' && type_ != 'u' &&
+        type_ != 'x' && type_ != 'X')
+      return;
     bool is_signed = type_ == 'd' || type_ == 'i';
     using target_type = conditional_t<std::is_same<T, void>::value, U, T>;
     if (const_check(sizeof(target_type) <= sizeof(int))) {
@@ -250,8 +253,9 @@ class printf_arg_formatter : public arg_formatter<Char> {
     if (std::is_same<T, Char>::value) {
       format_specs fmt_specs = this->specs;
       if (fmt_specs.type != presentation_type::none &&
-          fmt_specs.type != presentation_type::chr) {
-        return (*this)(static_cast<int>(value));
+          fmt_specs.type != presentation_type::chr &&
+          fmt_specs.type != presentation_type::any) {
+        fmt_specs.type = presentation_type::chr;
       }
       fmt_specs.sign = sign::none;
       fmt_specs.alt = false;
diff --git a/src/format.cc b/src/format.cc
index ecb8cc79a6e9..9fb66076748e 100644
--- a/src/format.cc
+++ b/src/format.cc
@@ -5,6 +5,9 @@
 //
 // For the license information refer to format.h.
 
+#ifdef __GNUC__
+#pragma GCC visibility push(default)
+#endif
 #include "fmt/format-inl.h"
 
 FMT_BEGIN_NAMESPACE