Improved "Stack too deep" error message.

Closes #2080.

1 files changed, 7 insertions, 4 deletions

diff --git a/CompilerUtils.cpp b/CompilerUtils.cpp
index e3d8f7f9..3549ef98 100644
--- a/CompilerUtils.cpp
+++ b/CompilerUtils.cpp
@@ -142,22 +142,25 @@ void CompilerUtils::moveToStackVariable(VariableDeclaration const& _variable)
 	solAssert(stackPosition >= size, "Variable size and position mismatch.");
 	// move variable starting from its top end in the stack
 	if (stackPosition - size + 1 > 16)
-		BOOST_THROW_EXCEPTION(CompilerError() << errinfo_sourceLocation(_variable.getLocation())
-											  << errinfo_comment("Stack too deep."));
+		BOOST_THROW_EXCEPTION(
+			CompilerError() <<
+			errinfo_sourceLocation(_variable.getLocation()) <<
+			errinfo_comment("Stack too deep, try removing local variables.")
+		);
 	for (unsigned i = 0; i < size; ++i)
 		m_context << eth::swapInstruction(stackPosition - size + 1) << eth::Instruction::POP;
 }
 
 void CompilerUtils::copyToStackTop(unsigned _stackDepth, unsigned _itemSize)
 {
-	solAssert(_stackDepth <= 16, "Stack too deep.");
+	solAssert(_stackDepth <= 16, "Stack too deep, try removing local variables.");
 	for (unsigned i = 0; i < _itemSize; ++i)
 		m_context << eth::dupInstruction(_stackDepth);
 }
 
 void CompilerUtils::moveToStackTop(unsigned _stackDepth)
 {
-	solAssert(_stackDepth <= 15, "Stack too deep.");
+	solAssert(_stackDepth <= 15, "Stack too deep, try removing local variables.");
 	for (unsigned i = 0; i < _stackDepth; ++i)
 		m_context << eth::swapInstruction(1 + i);
 }