src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/runtime/CompiledFunction.java

*** 150,159 ****
--- 150,163 ----
              return linkLogicClass;
          }
          return null;
      }
  
+     boolean convertsNumericArgs() {
+         return isSpecialization() && specialization.convertsNumericArgs();
+     }
+ 
      int getFlags() {
          return flags;
      }
  
      /**
*** 386,399 ****
              final Type[] callSiteType = toTypeWithoutCallee(callSiteMethodType, 1); // Always has callee
  
              int narrowWeightDelta = 0;
              int widenWeightDelta = 0;
              final int minParamsCount = Math.min(Math.min(thisParamCount, otherParamCount), callSiteParamCount);
              for(int i = 0; i < minParamsCount; ++i) {
!                 final int callSiteParamWeight = getParamType(i, callSiteType, csVarArg).getWeight();
                  // Delta is negative for narrowing, positive for widening
!                 final int thisParamWeightDelta = getParamType(i, thisType, thisVarArg).getWeight() - callSiteParamWeight;
                  final int otherParamWeightDelta = getParamType(i, otherType, otherVarArg).getWeight() - callSiteParamWeight;
                  // Only count absolute values of narrowings
                  narrowWeightDelta += Math.max(-thisParamWeightDelta, 0) - Math.max(-otherParamWeightDelta, 0);
                  // Only count absolute values of widenings
                  widenWeightDelta += Math.max(thisParamWeightDelta, 0) - Math.max(otherParamWeightDelta, 0);
--- 390,411 ----
              final Type[] callSiteType = toTypeWithoutCallee(callSiteMethodType, 1); // Always has callee
  
              int narrowWeightDelta = 0;
              int widenWeightDelta = 0;
              final int minParamsCount = Math.min(Math.min(thisParamCount, otherParamCount), callSiteParamCount);
+             final boolean convertsNumericArgs = cf.convertsNumericArgs();
              for(int i = 0; i < minParamsCount; ++i) {
!                 final Type callSiteParamType = getParamType(i, callSiteType, csVarArg);
!                 final Type thisParamType = getParamType(i, thisType, thisVarArg);
!                 if (!convertsNumericArgs && callSiteParamType.isBoolean() && thisParamType.isNumeric()) {
!                     // When an argument is converted to number by a function it is safe to "widen" booleans to numeric types.
!                     // However, we must avoid this conversion for generic functions such as Array.prototype.push.
!                     return false;
!                 }
!                 final int callSiteParamWeight = callSiteParamType.getWeight();
                  // Delta is negative for narrowing, positive for widening
!                 final int thisParamWeightDelta = thisParamType.getWeight() - callSiteParamWeight;
                  final int otherParamWeightDelta = getParamType(i, otherType, otherVarArg).getWeight() - callSiteParamWeight;
                  // Only count absolute values of narrowings
                  narrowWeightDelta += Math.max(-thisParamWeightDelta, 0) - Math.max(-otherParamWeightDelta, 0);
                  // Only count absolute values of widenings
                  widenWeightDelta += Math.max(thisParamWeightDelta, 0) - Math.max(otherParamWeightDelta, 0);