Bug? Neither IDE nor compiler detects the invalid string declaration: Private strMsg as string=""Hello world"

toby

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• Apr 25, 2025

• #1

B4X:

Private strMsg as string=""Hello world"  'I meant to type "Hello world"
log(strMsg) 'Empty string is printed

As shown, there is an extra double quote, by mistake, at the beginning of the text. And both IDE and compiler ignore Hello World" part once they reach the second double quote thinking it's an empty string.

 

Last edited: Apr 25, 2025

drgottjr

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• Apr 25, 2025

• #2

not ignored; doesn't compile here...

 

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• capture.jpg

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Last edited: Apr 26, 2025

toby

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• Apr 26, 2025

• #3

drgottjr said:

not ignored; doesn't compile here...

Click to expand...

It's strange. My screenshot shows that my B4A IDE behaves differently from yours. I'm using B4A 13.10 on 64-bit Windows 11, by the way.

 

toby

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• Apr 26, 2025

• #4

test project attached

 

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• extraQuote.zip

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toby

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• Apr 26, 2025

• #5

I've finally figured out how to reproduce

Step 1. Declare a valid string.

B4X:

Private strMsg as string="Hello world"

Step 2. Insert a double quote anywhere in the above string:

B4X:

Private strMsg as string="Hell"o world"

IDE will happily accept it without further validation while compiler would truncate the string at the insertion point. The above declaration will cause strMsg to contain "Hell" instead of expected "Hello World".

 

Last edited: Apr 27, 2025

Erel

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• Apr 27, 2025

• #6

Fixed for the next update.